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Propane Tank Sizing Calculator

Get a recommended propane tank size based on your home's total connected appliance BTU load.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax

Recommended tank size

120 gallons

Check your inputs

This is general supplier guidance — your propane provider will also consider desired refill frequency, local setback code requirements, and whether the tank is above or below ground when finalizing your tank size and placement.

With the figures above, the recommended tank size comes to 120 gallons. The method behind this is well established, though site conditions and material batches will move it somewhat. This is calculated for United States and cites IRC 2024. Building in another market? Change the selector above so the units and code reference follow.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Common propane supplier sizing guidance by total connected BTU/hr load: up to 100,000 BTU/hr = 120 gal, up to 200,000 = 250 gal, up to 400,000 = 500 gal, above that = 1,000 gal

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Frequently asked questions

Does a bigger tank mean fewer refills?
Yes — for the same usage rate, a larger tank holds more fuel and needs refilling less often, which many homeowners in rural areas value for convenience, though it also costs more to fill at once.
Does tank size affect vaporization capacity in cold weather?
Yes — larger tanks have more liquid surface area, which helps propane vaporize fast enough to meet high demand (like a furnace running hard) in very cold weather; an undersized tank can struggle to keep up on the coldest days even with plenty of fuel left.
Do local codes affect where a propane tank can be placed?
Yes — most jurisdictions require specific setback distances from buildings, property lines, and ignition sources based on tank size, and larger tanks generally need larger setbacks. Check your local fire code before finalizing tank size and placement.