Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- User-supplied metered energy per load. Equipment costs, fixed utility charges and installation are excluded.
Example Calculation
- Electric dryer energy per load: 3 kWh
- Gas dryer gas per load: 0.1 therm
- Gas dryer electricity per load: 0.2 kWh
- Electricity price: 0.2 currency/kWh
- Gas price: 1.5 currency/therm
- Annual loads: 200
At the entered use and tariffs, 200 loads cost 120 for electric and 38 for gas plus auxiliary electricity.
Frequently asked questions
How do I use this calculator?
Enter electric dryer energy per load, gas dryer gas per load, gas dryer electricity per load, electricity price, gas price, annual loads. The result updates automatically. Use Reset to restore the example values.
What method does it use?
annual electric=loads × electric kWh × tariff; gas=loads × (therms × gas tariff+aux kWh × electric tariff).. User-supplied metered energy per load. Equipment costs, fixed utility charges and installation are excluded.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.