Natural Gas Bill Calculator
Estimate your monthly natural gas bill based on usage. Great for budgeting heating costs.
* Rates vary by location and utility provider. Check your actual bill for exact rates. Default values based on US national averages.
Winter
Summer
Based on entered usage. Gas Furnace: 95% efficiency. Electric Furnace: 100% efficiency at $0.16/kWh. Heat Pump: COP 3.0 at $0.16/kWh. 1 therm = 29.3 kWh.
Understanding Your Gas Bill
🔥 How Gas is Measured
In the US, natural gas is typically measured in therms or CCF (100 cubic feet). One therm equals approximately 100,000 BTUs of energy — roughly the heat from burning 100 cubic feet of gas.
Your meter reads in CCF, which your utility converts to therms based on the gas’s heat content that month.
📊 Typical US Usage
- Summer (no heating): 10-20 therms/month
- Spring/Fall: 20-40 therms/month
- Winter (heating): 80-150+ therms/month
- Average US household: ~50 therms/month
- Water heater alone: ~15-20 therms/month
💡 Saving on Gas Bills
Lower your thermostat by 1°F to save about 3% on heating costs. Use a programmable thermostat to reduce heat when you’re asleep or away.
Seal air leaks around windows and doors, add insulation, and maintain your furnace annually. Consider a tankless water heater for additional savings.
⚠️ Bill Components
Your actual bill includes more than just gas usage: delivery charges, customer fees, state taxes, and sometimes a gas cost adjustment based on market prices.
Gas rates can change monthly based on wholesale prices. Budget billing (equal payments) can help smooth out seasonal spikes.