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.
- Dryer manufacture is excluded. Ensure the towel factor boundary is understood before comparing totals. Scenario calculation using your supplied factors. Defaults are illustrative inputs, not verified regional or product-specific measurements.
Example Calculation
- Dryer power: 1000 W
- Drying duration: 15 s
- Electricity factor: 0.4 kg CO₂e/kWh
- Towels per drying: 2
- Impact per towel: 3 g CO₂e
- Drying events: 1000
1000 events at 1000 W for 15 seconds and 0.4 kg/kWh give about 1.667 kg CO₂e; entered towels total 6 kg.
Frequently asked questions
How do I use this calculator?
Enter dryer power, drying duration, electricity factor, towels per drying, impact per towel, drying events. The result updates automatically. Use Reset to restore the example values.
What method does it use?
dryer kg=watts × seconds/3.6e6 × electricity factor × events; towels kg=towels × factor g × events/1000.. Dryer manufacture is excluded. Ensure the towel factor boundary is understood before comparing totals. Scenario calculation using your supplied factors. Defaults are illustrative inputs, not verified regional or product-specific measurements.
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.