40 Lb Propane Tank Dimensions: Complete Size, Weight & Specs Guide
In this guide: Everything you need to know about 40 lb propane tank dimensions - covering exact height, diameter, and weight specifications, how dimensions compare across brands, how 40 lb tanks compare to other sizes, storage and clearance requirements, shipping dimensions, and answers to the most common questions about 40 lb propane tank size.
40 Lb Propane Tank Dimensions: Quick Answer
A standard 40 lb propane tank measures approximately 29–30 inches tall (without the valve guard collar) and approximately 12 inches in outer diameter. The empty weight - called the tare weight (TW) and stamped on the collar - is approximately 17–18 lbs. When filled to the DOT-required 80% level with 40 lbs of propane (~9.4 gallons), the total filled weight is approximately 57–58 lbs. The valve guard collar adds approximately 1–2 inches to the overall height, bringing the total height with guard to approximately 30–32 inches. These dimensions are consistent across all major brands - Worthington, Flame King, and Manchester - because all are manufactured to DOT 4BA or 4BW specifications, which define fixed minimum dimensions regardless of brand. The key variables that cause slight dimension variations are: the valve guard collar height (which differs by manufacturer), the specific toe ring design (which adds 1–2 inches at the base), and the presence or absence of an anti-tilt ring on the collar. Height without guard: ~29–30 inches. Height with guard: ~30–32 inches. Outer diameter: ~12 inches. Empty weight: ~17–18 lbs. Filled weight: ~57–58 lbs.
Bottom line: 40 lb propane tank = approximately 29–30 inches tall (without guard) × 12 inches diameter × approximately 17–18 lbs empty (57–58 lbs filled). All standard DOT 4BA/4BW certified 40 lb tanks share these dimensions within a 1–2 inch tolerance.
Exact 40 Lb Propane Tank Dimensions
Full Dimensional Specifications
| Dimension | Without Valve Guard | With Valve Guard | Notes |
|---|---|---|---|
| Overall height | ~29–30 inches | ~30–32 inches | Guard adds 1–2 inches |
| Outer diameter | ~12 inches | ~12 inches | Consistent across all brands |
| Valve guard height | 2–3 inches | - | Type 1 valve collar; varies by manufacturer |
| Collar height (anti-tilt ring) | 1.5–2.5 inches | - | Some models include this; adds to overall height |
| Base ring (toe ring) | 0.5–1 inch | - | Bottom reinforcement ring; adds to overall height |
| Total height (toe ring to guard top) | - | ~31–33 inches | Maximum dimension for packaging/shipping |
| Wall thickness (minimum) | 0.090–0.110 inches | - | DOT 4BA specification |
| Inner diameter | ~11.5 inches | - | After accounting for wall thickness |
The "height" of a 40 lb propane tank depends on which point you measure from and whether the valve guard is included. The most common measurement cited by manufacturers is the overall height without the valve guard, which is approximately 29–30 inches. When the valve guard collar is included (as when the tank is standing upright for storage), the total height is approximately 30–32 inches. The toe ring at the base adds approximately 0.5–1 inch to the standing height. For clearance planning, use approximately 33–34 inches as the total clearance height requirement for a standing 40 lb propane tank.
Component-by-Component Height Breakdown
| Component | Height | Location on Tank |
|---|---|---|
| Cylinder body | ~26–27 inches | Main propane container |
| Top dome | ~1–2 inches | Curved top section where valve mounts |
| Valve guard collar | ~2–3 inches | Covers valve; has carry handle |
| Anti-tilt ring (some models) | ~1.5–2.5 inches | Collar lip preventing tank from tipping |
| Base toe ring | ~0.5–1 inch | Bottom reinforcement ring |
| Total (with guard, with toe ring) | ~31–33 inches | Maximum standing height |
40 Lb Propane Tank Weight Specifications
Weight by Fill Level
| Weight Type | Approximate Value | Details |
|---|---|---|
| Tare weight (TW) - empty | ~17–18 lbs | Stamped on collar; exact value varies by ±0.5–1 lb |
| Filled weight (TW + 40 lbs propane) | ~57–58 lbs | TW + 40 lbs propane at 80% fill |
| Weight of propane (80% fill) | 40 lbs | DOT-regulated maximum fill weight |
| Volume of propane (80% fill) | ~9.4 gallons | 40 lbs ÷ 4.24 lbs/gallon at 60°F |
| Water capacity (100% volume) | ~47 lbs | Used to calculate fill weight |
| Propane density at 60°F | 4.24 lbs/gallon | Standard reference |
| Tank + full propane + accessories | ~59–60 lbs | If tank cover, gauge, or other accessories installed |
The tare weight (TW) stamped on the collar is the single most important weight measurement for a 40 lb propane tank. Always use the exact TW stamped on your specific tank - not the approximate 17–18 lbs - when calculating how much propane is in your tank using the weigh test formula: Gallons remaining = (Total Weight − TW) ÷ 4.24 lbs/gallon.
How 40 Lb Propane Tank Dimensions Compare to Other Sizes
Side-by-Side Dimensional Comparison
| Tank Size | Propane Capacity | Height (approx.) | Diameter (approx.) | Empty Weight | Filled Weight | Gallons (approx.) |
|---|---|---|---|---|---|---|
| 5 lb | 5 lbs | ~12 inches | ~8 inches | ~8–9 lbs | ~13–14 lbs | ~1.2 gal |
| 10 lb | 10 lbs | ~18 inches | ~9 inches | ~10–11 lbs | ~20–21 lbs | ~2.4 gal |
| 20 lb | 20 lbs | ~18 inches | ~12 inches | ~13–14 lbs | ~33–34 lbs | ~4.7 gal |
| 30 lb | 30 lbs | ~24 inches | ~12 inches | ~15–17 lbs | ~45–47 lbs | ~7.1 gal |
| 40 lb | 40 lbs | ~29–30 inches | ~12 inches | ~17–18 lbs | ~57–58 lbs | ~9.4 gal |
| 100 lb | 100 lbs | ~48–52 inches | ~14–15 inches | ~30–35 lbs | ~130–135 lbs | ~23.6 gal |
| 420 lb | 420 lbs | ~60+ inches | ~24+ inches | ~180–200 lbs | ~600–620 lbs | ~99 gal |
The 40 lb propane tank shares the same outer diameter (~12 inches) as the 20 lb and 30 lb sizes, but is significantly taller - approximately 29–30 inches versus approximately 18 inches for the 20 lb tank. This height difference is the primary physical distinction between a 40 lb tank and the smaller consumer cylinders. The 100 lb tank is noticeably wider (~14–15 inches diameter) in addition to being significantly taller (~48–52 inches).
Height Comparison Visual Reference
| Tank Size | Relative Height (text) | Height in Inches |
|---|---|---|
| 5 lb | ■ | ~12" |
| 10 lb | ■ ■ | ~18" |
| 20 lb | ■ ■ | ~18" |
| 30 lb | ■ ■ ■ | ~24" |
| 40 lb | ■ ■ ■ ■ ■ | ~29–30" |
| 100 lb | ■ ■ ■ ■ ■ ■ ■ ■ | ~48–52" |
40 Lb Propane Tank: Valve Guard and Collar Dimensions
Valve Guard Specifications
| Component | Specification | Notes |
|---|---|---|
| Valve guard height | 2–3 inches | Overhangs valve for protection |
| Valve guard width | ~12 inches (matches tank) | Full-width collar design |
| Carry handle | Integrated in guard | Yes - for one-person carrying |
| Handle position | Top of valve guard | Ergonomic carry position |
| Anti-tilt ring | 1.5–2.5 inches protrusion | Prevents tank from rolling/tipping |
| Valve opening | 1-5/16" UNS female ACME | Standard Type 1 thread |
| Valve guard material | Steel (same as tank) | Painted or powder-coated |
The valve guard on a 40 lb propane tank serves three functions: (1) It protects the Type 1 valve from impact damage during handling and transport. (2) It includes an integrated carry handle that allows one person to carry the tank by the collar. (3) The anti-tilt ring on the collar prevents the tank from rolling when set on its side. When planning storage space, account for the full guard height of approximately 30–32 inches from the floor to the top of the guard.
Storage and Clearance Requirements for 40 Lb Propane Tanks
Indoor Storage Requirements (Permanent Installations Only)
| Requirement | Specification | Code Reference |
|---|---|---|
| Minimum room volume | 50 cubic feet per 1,000 BTU/hr of connected load | NFPA 58 |
| Maximum indoor cylinder size | 2.1 lbs water capacity (~1.75 lbs propane) for non-permanent use | DOT / NFPA 58 |
| Permanent indoor installations | Permitted with proper piping, shutoff, and ventilation | Local code varies |
| Ventilation requirement | Must have ventilation to outside at grade level | NFPA 58 |
| Shutoff valve location | Within 3 feet of appliance; readily accessible | NFPA 58 |
| Clearance from ignition sources | 5 feet minimum from sparks, flames, electrical devices | NFPA 58 |
| Floor material | Non-combustible floor or protected floor | NFPA 58 |
| Wall clearance | 0 inches (tank may contact wall) | NFPA 58 |
| Seismic anchoring | Required in seismic zones | Local code |
For non-permanent indoor use (portable appliances): only cylinders with 2.1 lbs water capacity or less may be used indoors. A 40 lb propane tank has approximately 47 lbs water capacity - far exceeding this limit - and must never be used indoors for portable applications. The 40 lb tank is permitted for permanent indoor installations only when properly piped, vented, and installed by a licensed propane technician.
Outdoor Storage Clearance Requirements
| Requirement | Specification | Notes |
|---|---|---|
| Minimum distance from building opening | 5 feet from windows, doors, and building air intakes | NFPA 58 |
| Minimum distance from ignition sources | 10 feet from sparks, open flames, electrical devices | NFPA 58 |
| Above-ground tank spacing | 3 feet from nearest other propane tank | NFPA 58 |
| Below-ground burial depth | Minimum 12 inches of cover; varies by local code | DOT / local code |
| Fence enclosure | Permitted; no specific minimum distance from fence | NFPA 58 |
| Vehicle parking clearance | 10 feet minimum from parked vehicles | NFPA 58 / local code |
| Sloped surface | Tank must be on level surface; never on slope > 6 degrees | Best practice |
Shipping Carton Dimensions (Retail Packaging)
| Dimension | Approximate Value | Notes |
|---|---|---|
| Carton height | ~32–34 inches | Accommodates tank + guard + packaging |
| Carton width | ~13–14 inches | Slightly larger than tank diameter |
| Carton depth | ~13–14 inches | Square carton for cylinder |
| Carton weight (full) | ~58–60 lbs | Tank filled + carton |
| Units per pallet | 12–24 units | Varies by manufacturer and pallet size |
40 Lb Propane Tank: Diameter, Wall Thickness, and Pressure Ratings
Structural Specifications
| Specification | Value | Notes |
|---|---|---|
| Outer diameter | ~12 inches (304.8 mm) | Consistent across all DOT 4BA tanks |
| Inner diameter | ~11.7–11.8 inches | After wall thickness |
| Wall thickness (minimum) | 0.090–0.110 inches | DOT 4BA specification |
| Wall thickness (typical) | 0.095–0.105 inches | Manufacturer varies |
| Material | ASTM A 525 or equivalent steel | Hot-dip galvanized or primer + paint |
| Construction method | Welded longitudinal seam | High-frequency welding |
| Maximum working pressure | 250 psi | At 70°F |
| Test pressure | 500 psi | Hydrostatic test at factory |
| Relief valve set pressure | 375 psi | Factory-set; DOT-required |
| Design stress | 24,000 psi (max) | For 4BA specification |
The 12-inch outer diameter of the 40 lb propane tank is not arbitrary - it is defined by the DOT 4BA specification, which sets the minimum wall thickness based on the tank's water capacity and maximum working pressure. The 12-inch diameter is large enough to provide structural stability (the tank will not roll freely and can stand upright without support) while remaining narrow enough to pass through standard doorways (30-inch minimum width). This makes the 40 lb tank the largest portable propane cylinder that can be transported through a standard residential doorway.
Why the 12-Inch Diameter Is Standard
| Reason | Explanation |
|---|---|
| DOT 4BA specification | The DOT 4BA specification defines a fixed outer diameter relationship to water capacity; 40 lb water capacity tanks fall at ~12 inches |
| Standardization | All major manufacturers (Worthington, Flame King, Manchester) use the same mold/form dimensions for 40 lb tanks |
| Structural stability | 12 inches provides a low center of gravity; tank stands upright without support |
| Standard doorways | 12-inch diameter fits through standard 30-inch residential doorways |
| Forklift mounting compatibility | Standard forklift cylinder cradles are designed around the 12-inch diameter |
| Rack and bracket compatibility | Most RV and trailer propane tank brackets are designed for 12-inch diameter cylinders |
Brand Comparison: 40 Lb Propane Tank Dimensions by Manufacturer
Manufacturer Dimensional Comparison
| Brand / Model | Overall Height | Diameter | Empty Weight (TW) | Valve Guard Style |
|---|---|---|---|---|
| Worthington Pro Grade 302018 | ~29–30 inches | ~12 inches | ~17–18 lbs | Standard collar with handle |
| Flame King (various models) | ~29–30 inches | ~12 inches | ~17–18 lbs | Standard collar; powder coat option |
| Manchester 40 lb | ~29–30 inches | ~12 inches | ~17–18 lbs | Standard collar with handle |
| Blue Rhino exchange tank | ~29–30 inches | ~12 inches | ~17–18 lbs | Exchange program; specific branding |
| AmeriGas exchange tank | ~29–30 inches | ~12 inches | ~17–18 lbs | Exchange program; specific branding |
| Generic DOT 4BA tank | ~29–30 inches | ~12 inches | ~17–18 lbs | Standard |
All DOT 4BA or 4BW certified 40 lb propane tanks share the same core dimensions: approximately 29–30 inches tall (without guard) and approximately 12 inches in diameter. The variations between brands are limited to: the specific height of the valve guard collar (2–3 inches, ±0.5 inches between manufacturers), the presence or absence of an anti-tilt ring on the collar (adds 1.5–2.5 inches to the collar height), the finish (basic paint vs. powder coat), and the tare weight stamp (±0.5–1 lb variation in empty weight). When comparing dimensions across brands, assume approximately ±1 inch height tolerance and approximately ±0.5 lb weight tolerance.
40 Lb Propane Tank Dimensions: Common Questions About Size
Fitting Through Doorways and Spaces
| Space Requirement | Dimensions | Fits a 40 lb Tank? |
|---|---|---|
| Standard residential doorway | 30 inches wide × 80 inches tall | ✅ Yes (diameter 12" < 30"; height ~30–32" < 80") |
| Standard exterior door | 36 inches wide × 80 inches tall | ✅ Yes |
| Compact car trunk | Varies; typically ~36" × ~20" opening | ⚠️ May fit but heavy (~58 lbs); not recommended |
| SUV / minivan cargo area | Varies; typically ~48" × ~30" | ✅ Yes |
| Pickup truck bed | Varies; typically 5–8 feet long × ~50–70" wide | ✅ Yes |
| RV basement storage compartment | Varies; typically 30–48" × 24–36" | ✅ Yes (most RV compartments designed for this) |
| Small closet (temporary storage) | ~36" × ~24" × 80" tall | ✅ Yes (if outdoor appliance) |
| Interior closet | - | ❌ Never store 40 lb tanks indoors unless permanent installation |
How to Measure Your 40 Lb Propane Tank
| Measurement | How to Take It | Tools Needed |
|---|---|---|
| Overall height (without guard) | Floor to top of cylinder dome (below collar) | Tape measure |
| Overall height (with guard) | Floor to top of valve guard | Tape measure |
| Outer diameter | Wrap tape measure around tank at center; divide by π | Soft tape measure |
| Tare weight (TW) | Read stamped value on collar ring | None - just read the stamp |
| Filled weight | Weigh tank on platform scale | Bathroom scale (subtract your weight) or platform scale |
| Height to top of valve guard | Floor to highest point of valve guard | Tape measure |
Frequently Asked Questions
Q1: What are the exact dimensions of a 40 lb propane tank?
A standard 40 lb propane tank measures approximately 29–30 inches tall (from the base to the top of the cylinder dome, without the valve guard collar) and approximately 12 inches in outer diameter. With the valve guard collar installed, the total height is approximately 30–32 inches. The base toe ring adds approximately 0.5–1 inch to the standing height from floor to base. For clearance planning, a standing 40 lb propane tank requires approximately 33–34 inches of vertical clearance. These dimensions are consistent across all DOT 4BA/4BW certified 40 lb tanks from any manufacturer, with a tolerance of approximately ±1 inch in height and ±0.5 inch in diameter. The key dimensional variable is the valve guard height, which varies by approximately 0.5–1 inch between manufacturers.
Q2: How much does a 40 lb propane tank weigh empty and filled?
A 40 lb propane tank weighs approximately 17–18 lbs empty (the tare weight, stamped as TW on the collar). When filled to the DOT-required 80% level with 40 lbs of propane (~9.4 gallons), the total filled weight is approximately 57–58 lbs. The exact empty weight varies slightly between manufacturers (typically ±0.5–1 lb) and is stamped on the collar of each individual tank. Always use the exact TW stamped on your specific tank - not the approximate 17–18 lbs - when calculating propane remaining using the weigh test: Gallons = (Total Weight − TW) ÷ 4.24 lbs/gallon. The valve guard collar adds approximately 1–2 lbs to the total weight but is already included in the stamped TW. Accessories such as tank covers, external gauges, or mounting hardware add additional weight on top of the filled tank weight.
Q3: How do 40 lb propane tank dimensions compare to a 20 lb tank?
The 40 lb and 20 lb propane tanks share the same outer diameter of approximately 12 inches, but differ significantly in height. A 20 lb propane tank measures approximately 18 inches tall, while a 40 lb tank measures approximately 29–30 inches tall - approximately 11–12 inches taller. The 40 lb tank holds exactly 2× more propane (40 lbs vs. 20 lbs = ~9.4 gallons vs. ~4.7 gallons) but is not twice the physical size in every dimension - only the height doubles, while the diameter remains the same. This is because both tanks are built to the same DOT 4BA specification, which defines a fixed outer diameter of approximately 12 inches for this water capacity range. The 20 lb tank is shorter because it has a shorter cylinder body (approximately 15 inches of cylinder height vs. approximately 26–27 inches for the 40 lb tank). The 40 lb tank's greater height is its primary distinction from the 20 lb tank.
Q4: Can a 40 lb propane tank fit through a standard doorway?
Yes - a 40 lb propane tank fits through a standard 30-inch-wide residential doorway with approximately 18 inches of clearance on either side of the 12-inch diameter tank. The standing height of approximately 30–32 inches (with valve guard) is well below the standard 80-inch door height. To move a 40 lb propane tank through a doorway: (1) Stand the tank upright and tilt it slightly toward you. (2) The 12-inch diameter passes easily through a 30-inch opening. (3) Have a second person guide the top of the tank through the doorway as you walk forward. (4) The tank's 57–58 lb filled weight makes this a two-person job for most people. For narrow doors (less than 30 inches wide), the tank cannot fit. For any doorway with a height less than 32 inches, the tank with valve guard cannot fit standing upright and would need to be laid on its side - but propane tanks must always be transported and stored upright, never on their side.
Q5: How much vertical clearance does a 40 lb propane tank need?
A standing 40 lb propane tank requires approximately 33–34 inches of vertical clearance from the floor to the lowest overhead obstruction. This measurement includes: the base toe ring (approximately 0.5–1 inch), the cylinder body and dome (approximately 27–28 inches), and the valve guard collar (approximately 2–3 inches). The standard 40 lb tank without a valve guard collar (or with a low-profile guard) requires approximately 30–31 inches of clearance. For storage in tight spaces such as RV compartments, basement lockers, or enclosed trailers, measure your available clearance and compare it to these dimensions. Allow an additional 2–3 inches of clearance for maneuverability when installing or removing the tank. Most enclosed propane tank compartments on RVs and trailers are designed to accommodate the 40 lb tank's dimensions with 2–4 inches of additional clearance for installation ease.
Q6: What is the wall thickness of a 40 lb propane tank?
A 40 lb propane tank has a minimum wall thickness of approximately 0.090–0.110 inches (90–110 thousandths of an inch), as required by DOT 4BA specification. The actual manufactured wall thickness is typically between 0.095 and 0.105 inches - slightly above the minimum - to provide a safety margin and account for normal manufacturing tolerances. This thin steel wall is why propane tanks must be protected from physical impact, why severe rust or corrosion is a safety concern, and why dented tanks must be removed from service. The wall thickness is not visible from the outside and cannot be measured without specialized equipment. The corrosion process gradually thins the wall over many years, which is why tanks with visible rust pitting must be replaced - the pitting represents localized wall thickness reduction that compromises the tank's pressure rating.
Q7: Is a 40 lb propane tank the same size as a standard BBQ grill tank?
No - a standard BBQ grill tank is typically a 20 lb propane tank, not a 40 lb tank. A standard 20 lb propane tank (the kind you see at gas stations and hardware stores for BBQ grills) measures approximately 18 inches tall × 12 inches in diameter and holds approximately 20 lbs (~4.7 gallons) of propane. A 40 lb propane tank is approximately 29–30 inches tall × 12 inches in diameter - about 11–12 inches taller than a BBQ grill tank. The 40 lb tank holds exactly 2× more propane than the 20 lb tank but is not twice the diameter - the diameter is the same (both are 12 inches). The 40 lb tank is approximately the height of two stacked 20 lb tanks, making it a significant step up in size. Some gas grill models - particularly large commercial or industrial grills - may use 40 lb tanks as their propane source, but the standard home BBQ grill uses a 20 lb tank.
Q8: What is the DOT 4BA specification and why does it define 40 lb tank dimensions?
DOT 4BA is a U.S. Department of Transportation specification for welded steel refrigerant gas cylinders, which is also the primary specification for consumer and commercial propane cylinders in the 40 lb capacity range. The DOT 4BA specification defines: the minimum wall thickness (based on water capacity and maximum working pressure), the test pressure (500 psi), the maximum working pressure (250 psi), the required relief valve setting (375 psi), the materials of construction (specific steel grades), and the manufacturing and testing standards for all certified cylinders. The 40 lb propane tank's dimensions are largely a consequence of the physics of DOT 4BA: the specification requires a minimum wall thickness of 0.090–0.110 inches, and for a tank designed to hold approximately 47 lbs of water capacity at 250 psi, the resulting cylinder geometry that meets the specification's structural requirements produces approximately a 12-inch diameter and approximately 29–30 inches of cylinder height. This is why all 40 lb propane tanks - regardless of brand - share essentially the same dimensions: they are all built to the same physics-defined DOT specification.
The Bottom Line: 40 Lb Propane Tank Dimensions
The 40 lb propane tank measures approximately 29–30 inches tall (without valve guard) × approximately 12 inches in outer diameter × approximately 17–18 lbs empty (57–58 lbs filled). With the valve guard collar installed, the total standing height is approximately 30–32 inches. These dimensions are defined by the DOT 4BA specification and are consistent across all major manufacturers (Worthington, Flame King, Manchester, and exchange programs) with a tolerance of approximately ±1 inch. The 12-inch diameter is the same as the smaller 20 lb and 30 lb sizes; only the height increases with capacity. The 40 lb tank's height (approximately 29–30 inches) makes it the tallest commonly available portable propane cylinder that still fits through a standard 30-inch residential doorway. For storage, allow approximately 33–34 inches of vertical clearance and ensure the storage location is level, ventilated, and away from ignition sources.
Key takeaways:
| Takeaway | Detail |
|---|---|
| ✅ Height without guard: ~29–30 inches | Floor to top of cylinder dome |
| ✅ Height with guard: ~30–32 inches | Full standing height |
| ✅ Diameter: ~12 inches | All DOT 4BA/4BW tanks share this |
| ✅ Empty weight: ~17–18 lbs | TW stamped on collar; use exact value |
| ✅ Filled weight: ~57–58 lbs | TW + 40 lbs propane |
| ✅ DOT 4BA/4BW specification | Defines all dimensions consistently |
| ✅ Same diameter as 20 lb and 30 lb tanks | Only height differs |
| ✅ Fits through standard 30-inch doorway | 12" diameter; ~32" height |
| ✅ Wall thickness: 0.090–0.110 inches | Minimum; per DOT specification |
| ✅ Toe ring adds ~0.5–1 inch | Base reinforcement ring |
| ✅ Valve guard adds ~2–3 inches | Top collar with carry handle |
| ✅ Requires ~33–34 inches vertical clearance | For storage planning |
Remember:
40 lb propane tank = ~29–30" tall × ~12" diameter (without guard)
With valve guard: ~30–32" total standing height
Filled weight: ~57–58 lbs (empty ~17–18 lbs + 40 lbs propane)
DOT 4BA specification defines dimensions consistently across all brands
12" diameter = same as 20 lb and 30 lb tanks
40 lb tank is ~11–12" taller than 20 lb tank
100 lb tank is ~48–52" tall × ~14–15" diameter - much larger
Valve guard collar: ~2–3" tall; integrated carry handle
Anti-tilt ring on collar: ~1.5–2.5" protrusion; prevents rolling
Base toe ring: ~0.5–1"; bottom reinforcement
Storage clearance: ~33–34" vertical
Fits through 30-inch standard doorway: 12" < 30" ✓
Fits in RV compartment: most RV compartments designed for this
Forklift mounting: standard 12" diameter fits all standard cradles
Wall thickness: 0.090–0.110" minimum (DOT 4BA)
DOT 4BA test pressure: 500 psi; working pressure: 250 psi; relief: 375 psi
Always use exact TW from collar stamp for weigh test calculations
Gallons remaining = (Total Weight − TW) ÷ 4.24 lbs/gallon
TW varies by ±0.5–1 lb between individual tanks and manufacturers
40 lb tank = not the same as BBQ grill tank (BBQ = 20 lb = ~18" tall)
40 lb tank = approximately height of two stacked 20 lb tanks
DOT 4BA dimensions: physics-defined by water capacity and pressure ratings
All major brands (Worthington, Flame King, Manchester) share same dimensions
Packaging carton: ~32–34" H × ~13–14" W × ~13–14" D
Vehicle transport: secure upright; never on side; windows open
Storage: level surface; 5 feet from building openings; 10 feet from ignition sources
Indoor permanent installation: requires licensed technician; proper piping; ventilation
Non-permanent indoor use: prohibited for tanks >2.1 lbs water capacity
40 lb propane tank dimensions: the most portable large propane cylinder size
40 lb propane tank dimensions: ~29–30" tall × ~12" diameter - tall, narrow, and built to DOT 4BA spec. All brands share these dimensions. It is the tallest portable propane cylinder that still fits through a standard doorway.
Last updated: July 2026
Disclaimer: This guide provides general dimensional specifications for 40 lb propane tanks. All dimensions represent standard DOT 4BA/4BW certified 40 lb propane tank configurations. Actual dimensions may vary by ±1 inch in height and ±0.5 inch in diameter between manufacturers. Always verify dimensions against the specific product documentation for your tank. Propane is a flammable gas - always follow DOT regulations, NFPA 58 guidelines, and all local propane safety codes for storage, transport, and use. Never use a damaged or corroded propane tank. In case of propane leak or emergency, evacuate the area and call 911.
