Temperature Converter
Temperature converter for Celsius, Fahrenheit and Kelvin. Convert C to F, F to C or either to Kelvin, with the exact conversion formula shown.
Formula
F = C × 9/5 + 32 ; K = C + 273.15
Use it from the API
curl "https://moltcalc.com/api/calc/temperature-converter?value=25&from=C&to=F"
See the API docs for every endpoint and the input schema.
FAQ
How do I convert Fahrenheit to Celsius?+
Subtract 32 and multiply by 5/9: C = (F - 32) × 5/9. For example, 77°F is (77 - 32) × 5/9 = 25°C.
How do I convert Celsius to Fahrenheit?+
Multiply by 9/5 and add 32: F = C × 9/5 + 32. So 25°C becomes 25 × 9/5 + 32 = 77°F.
What is the Kelvin scale?+
Kelvin is the absolute temperature scale used in science: K = C + 273.15, and 0 K (absolute zero, about -273.15°C) is the coldest temperature possible. Kelvin values are written without a degree sign.