Flame: Propane Tank Calc

What it does

Flame answers the propane questions. The Burn Time calculator, Tank Guide, and Heat Safe are free forever: pick your tank (per AmeriGas, a 20 lb cylinder holds ~4.7 usable gallons ≈ 430,000 BTU at the EIA's 92,000 BTU/gal), enter the appliance's rated BTU/hr, and get hours and days — always framed honestly: the rated figure is the appliance's maximum draw, so the answer is the floor, not a promise.

Heat Safe carries the rules that matter: the soapy-water leak test (never a match), NFPA's caveat that the rotten-egg odorant is not guaranteed, and CPSC's carbon-monoxide rule — outdoor equipment never runs indoors.

Flame Pro — one-time unlock

$6.99, once. Tank Scale: weigh the tank on any bathroom scale — the stamped TW tare in, propane left out: pounds, gallons, BTU, percent, hours. The tank gauge that needs no Bluetooth sensor. Trip Planner: furnace, fridge, stove, water heater with hours per day each, and the tank becomes days for the trip — the RV answer. No subscription, no ads, no account.

Privacy

Flame collects nothing. No analytics, no accounts, no cloud. Privacy policy · Support