RV Propane Burn Time Calculator

How This Tool Works

This calculator estimates how long your propane tank will last based on tank size and appliance BTU consumption. Propane contains approximately 21,500 BTU per pound, so a 20lb tank contains about 430,000 BTU total. The calculation divides total BTU capacity by the appliance's BTU consumption per hour to determine runtime. For example, an RV refrigerator using 1,500 BTU/hr would run for about 287 hours (12 days) on a 20lb tank if running continuously.

The calculation assumes continuous operation at full capacity, but in reality, most appliances cycle on and off based on need. Refrigerators only run when cooling, furnaces cycle based on thermostat settings, and water heaters only run when heating water. This means actual runtime may be significantly longer than calculated, especially for appliances that don't run constantly. Outside temperature, insulation quality, and usage patterns all affect actual consumption. Always keep spare tanks and monitor propane levels regularly, especially on longer trips.

Common RV Appliance BTU Ratings

• RV Refrigerator: 1,500-2,000 BTU/hr (cycles on/off)
• RV Furnace: 20,000-40,000 BTU/hr (varies by size and model)
• Water Heater: 10,000-15,000 BTU/hr (only runs when heating)
• Stove/Oven: 8,000-12,000 BTU/hr for all burners (varies by use)
• Note: Check your specific appliance manual for exact BTU ratings

Propane Safety Tips

• Always check for propane leaks before use (use soapy water on connections)
• Turn off propane at the tank when refueling your RV
• Keep tanks properly secured and in good condition
• Never store propane tanks in enclosed spaces
• Have tanks inspected regularly and replace if damaged
• Install and maintain propane leak detectors
• Know how to shut off propane in an emergency

FAQ

• How long does a 20lb propane tank last?
  A 20lb propane tank contains approximately 430,000 BTU. For an RV fridge (1500 BTU/hr), it would last about 287 hours (12 days) of continuous operation. For a furnace (30,000 BTU/hr), it would last about 14 hours. Actual usage varies based on cycling and outside temperature.
• How do I know my appliance BTU consumption?
  Check your appliance manual or look for a label on the appliance showing BTU rating. RV fridges typically use 1500-2000 BTU/hr, furnaces 20,000-40,000 BTU/hr, water heaters 10,000-15,000 BTU/hr, and stoves 8,000-12,000 BTU/hr for all burners.
• Why is my actual usage different from the calculation?
  Most appliances cycle on and off rather than running continuously. Fridges only run when cooling, furnaces cycle based on thermostat, and water heaters only run when heating water. Outside temperature, insulation, and usage patterns all affect actual consumption.
• How can I extend my propane runtime?
  To extend runtime: use appliances more efficiently (lower thermostat, shorter showers), improve insulation, use electric appliances when available, keep tanks full, and monitor usage. Consider larger tanks or multiple tanks for longer trips.
• Is it safe to run propane appliances while driving?
  Most RV propane appliances (fridge, water heater) can run while driving, but check your RV manual. Furnaces typically should not run while driving. Always ensure proper ventilation and check for leaks regularly. Turn off propane at the tank when refueling.