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.
- Factors must use consistent lifecycle boundaries and raw/cooked mass bases. No nutritional comparison. Scenario calculation using your supplied factors. Defaults are illustrative inputs, not verified regional or product-specific measurements.
Example Calculation
- Food amounts in kg: 1,2,3
- Matching emission factors in kg CO₂e/kg: 10,5,1
Masses 1,2,3 kg with factors 10,5,1 kg CO₂e/kg total 23 kg CO₂e.
Frequently asked questions
How do I use this calculator?
Enter food amounts in kg, matching emission factors in kg co₂e/kg. The result updates automatically. Use Reset to restore the example values.
What method does it use?
total CO₂e=Σfood mass × matching factor.. Factors must use consistent lifecycle boundaries and raw/cooked mass bases. No nutritional comparison. 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.