UseCalcPro
Home
MathFinanceHealthConstructionAutoPetsGardenCraftsFood & BrewingToolsSportsMarineEducationTravel
Blog
  1. Home
  2. Auto

RV Propane Calculator — Usage, Tank Duration & Cost

Estimate how many days your propane will last based on your RV appliances and tank size

Days of Propane

4.8 days

Gal/Day

1.98

Cost/Day

$6.92

Total Supply

9.4 gal

2

Days of Propane

4.8 days

Using 1.98 gal/day

BTU/Hour

44,000

BTU/Day

181,000

Cost/Day

$6.92

Total Supply

9.4 gal

Daily Usage by Appliance

RV Furnace1.64 gal/day
Water Heater0.26 gal/day
Stove (per burner)0.08 gal/day
Total1.98 gal/day

Frequently Asked Questions

Q

How long does a 20 lb propane tank last in an RV?

A 20 lb propane tank holds 4.7 gallons. With a furnace running 6 hours/day, water heater 2 hours/day, and stove 1 hour/day, it lasts about 2–3 days. Without heating, using only the stove and water heater, it can last 7–10 days.

  • 20 lb tank = 4.7 gallons = 429,450 BTU total capacity
  • Heavy use (furnace + all appliances): 2–3 days per tank
  • Moderate use (water heater + stove only): 7–10 days per tank
  • Light use (stove only, 1 hour/day): 50+ days per tank
  • Most RVs carry two 20 lb or 30 lb tanks for redundancy
Usage LevelBTU/DayDays per 20 lb Tank
Heavy (furnace + all)~175,0002–3
Moderate (heater + stove)~31,0007–10
Light (stove only)~7,00050+
Q

How many BTU does an RV furnace use?

Most RV furnaces consume 20,000–30,000 BTU per hour while running. A typical 25,000 BTU/hr furnace running 6 hours per day uses about 1.64 gallons of propane daily, making it the largest propane consumer in an RV by far.

  • Small RV furnace: 16,000–20,000 BTU/hr
  • Standard RV furnace: 25,000–30,000 BTU/hr
  • Large Class A furnace: 30,000–40,000 BTU/hr
  • At 25,000 BTU/hr for 6 hours = 150,000 BTU/day = 1.64 gal/day
  • The furnace alone can drain a 20 lb tank in under 3 days of cold-weather camping
Q

How much propane does an RV water heater use?

RV water heaters typically use 10,000–16,000 BTU per hour. Running 2 hours per day for showers and dishes, a 12,000 BTU/hr water heater consumes about 0.26 gallons of propane daily, making it the second largest propane user after the furnace.

  • 6-gallon RV water heater: 10,000–12,000 BTU/hr
  • 10-gallon RV water heater: 12,000–16,000 BTU/hr
  • Tankless RV water heater: 40,000–60,000 BTU/hr (but runs less time)
  • At 12,000 BTU/hr for 2 hours = 24,000 BTU/day = 0.26 gal/day
  • Consider solar water heating to reduce propane consumption
Q

How much does RV propane cost?

RV propane costs $3.00–$5.00 per gallon depending on region and refill method. Tank exchanges at hardware stores cost $4–$5/gallon, while direct refills at propane dealers average $2.50–$3.50/gallon. A typical RV using 2 gallons per day spends $7–$10 daily on propane.

  • Tank exchange (Blue Rhino, AmeriGas): $4.00–$5.00/gallon, most convenient
  • Direct refill at propane dealer: $2.50–$3.50/gallon, best value
  • RV park refill service: $3.50–$4.50/gallon, delivered to your site
  • Prices vary by region: higher in remote areas and national parks
  • Budget $200–$400/month for propane during cold-weather full-timing

Example Calculations

1Cold Weather Camping (All Appliances)

Inputs

Tank Size20 lb (4.7 gal) x 2 tanks
Furnace25,000 BTU/hr, 6 hr/day
Water Heater12,000 BTU/hr, 2 hr/day
Stove7,000 BTU/hr, 1 hr/day

Result

Days of Propane5.2 days
Total BTU/Day181,000
Gallons/Day1.98 gal
Cost/Day$6.93

Furnace: 25,000 x 6 = 150,000 BTU/day. Water heater: 12,000 x 2 = 24,000. Stove: 7,000 x 1 = 7,000. Total: 181,000 BTU/day. Gal/day = 181,000 / 91,500 = 1.98. Days = 9.4 / 1.98 = 4.7 days (2 tanks).

2Summer Camping (Minimal Usage)

Inputs

Tank Size20 lb (4.7 gal) x 1 tank
Water Heater12,000 BTU/hr, 1 hr/day
Stove7,000 BTU/hr, 0.5 hr/day

Result

Days of Propane28.0 days
Total BTU/Day15,500
Gallons/Day0.17 gal
Cost/Day$0.59

Water heater: 12,000 x 1 = 12,000. Stove: 7,000 x 0.5 = 3,500. Total: 15,500 BTU/day. Gal/day = 15,500 / 91,500 = 0.169. Days = 4.7 / 0.169 = 27.8 days.

Formulas Used

Daily Propane Consumption

Gallons/Day = Total BTU/Day ÷ 91,500

Converts total daily BTU demand from all appliances into gallons of propane consumed per day.

Where:

Total BTU/Day= Sum of (BTU/hr x hours/day) for each active appliance
91,500= BTU energy content per gallon of propane

Days of Supply

Days = Total Gallons ÷ Gallons/Day

Calculates how many days your propane supply will last at the current consumption rate.

Where:

Total Gallons= Tank capacity in gallons times number of tanks
Gallons/Day= Daily propane consumption from all appliances

Managing RV Propane Usage and Costs

Propane is the lifeblood of RV comfort systems, powering the furnace, water heater, stove, oven, and sometimes the refrigerator and generator. Understanding your propane consumption rate is essential for trip planning — running out of propane on a cold night in a remote campground is a miserable experience.

The RV furnace is by far the largest propane consumer, using 20,000–30,000 BTU per hour. Since one gallon of propane contains 91,500 BTU, a 25,000 BTU furnace burns through a gallon in about 3.7 hours. Running 6 hours per night in cold weather, the furnace alone consumes 1.6 gallons daily — draining a 20 lb tank (4.7 gallons) in under 3 days.

To maximize propane supply, consider supplemental electric heat when campground hookups are available, keep the RV well-insulated with closed window covers and sealed slides, and cook on a portable camp stove outside when weather permits. Carrying two tanks and refilling at propane dealers rather than exchanging at hardware stores saves both money and the hassle of partially filled exchange tanks.

Related Calculators

RV Weight Calculator

Track cargo weight and GVWR limits

RV MPG Calculator

Estimate RV fuel economy

RV Awning Size Calculator

Size an awning for your RV

Fuel Cost Calculator

Estimate fuel costs for trips

RV Water Tank Calculator \u2014 How Long Will Your Water Last?

Calculate how many days your RV fresh water tank will last based on tank size, occupants, and daily usage habits. See a fixture-by-fixture water breakdown.

RV Refrigerator Calculator \u2014 Propane vs 12V vs 120V Cost

Compare RV refrigerator power costs across propane, 12V DC, and 120V AC. Calculate daily BTU usage, amp-hours, kWh consumption, and find your cheapest source.

Related Resources

Garden Watering Calculator: How Much Water Does Your Garden Really Need?

Read our guide

Car Payment Calculator: How to Calculate Monthly Auto Loan Payments

Read our guide

Gas Mileage Calculator: How to Calculate MPG and Fuel Economy

Read our guide

RV Weight Calculator

Calculate cargo capacity including propane weight

RV MPG Calculator

Estimate fuel economy for your RV

RV Awning Size Calculator

Find the right awning size for your RV

Fuel Cost Calculator

Estimate fuel costs for any trip

More Auto Calculators

Explore all our free auto and vehicle calculators

View All Auto Calculators

Last Updated: Mar 25, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

UseCalcPro
FinanceHealthMath

© 2026 UseCalcPro