Tool
Temperature and CO2e Unit Converters
Convert Celsius, Fahrenheit and Kelvin, and convert kg, tonnes and pounds of CO2e.
Method
Exact definitions only: F = C × 9/5 + 32, K = C + 273.15, 1 tonne = 1,000 kg, 1 lb = 0.45359237 kg.
Limitations
None beyond rounding to two decimal places. Kelvin below 0 is rejected as physically impossible.
Temperature converter
Enter a value to convert.
CO2e unit converter
Converts a mass of CO2e between kilograms, metric tonnes, and pounds. It does not estimate emissions — use the other tools for that.
Enter a value to convert.
Exact definitions: °F = °C × 9/5 + 32; K = °C + 273.15; 1 tonne = 1,000 kg; 1 lb = 0.45359237 kg exactly.
Frequently asked questions
What does the Temperature and CO2e Unit Converter do?
It converts temperatures between Celsius, Fahrenheit and Kelvin, and converts CO2e mass between kilograms, tonnes and pounds, using exact definitions only.
What are the exact conversion formulas?
Fahrenheit equals Celsius times 9 divided by 5 plus 32, and Kelvin equals Celsius plus 273.15. One tonne equals 1,000 kg, and one pound equals 0.45359237 kg exactly.
Why does the converter reject Kelvin below zero?
Zero Kelvin is absolute zero, the lowest possible temperature, so a negative Kelvin value is physically impossible and the tool shows an error instead of a converted number.
Does the converter estimate emissions?
No. It converts units only and does not estimate emissions. Use the carbon footprint, home energy, car trip or flight tools for emissions estimates.
How are results rounded?
Results are shown to two decimal places. The underlying conversion uses the exact definitions above, so rounding is the only approximation in the displayed result.