Temperature Unit Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly — enter one value and see all three units, with the exact formulas.
Keep your temperature history on iPhone
Temperature Checker stores your manual readings privately on your device, with notes, profiles, and organized history.
Convert a temperature
Celsius
37 °C
Fahrenheit
98.6 °F
Kelvin
310.15 K
The formulas
- Celsius → Fahrenheit
- °F = °C × 9/5 + 32
- Celsius → Kelvin
- K = °C + 273.15
- Fahrenheit → Celsius
- °C = (°F − 32) × 5/9
About this temperature unit converter
This free tool converts a single temperature into Celsius, Fahrenheit, and Kelvin at the same time — handy for science, cooking, weather, or recording a reading in your preferred unit. For body-temperature entries, you can also use the dedicated Celsius to Fahrenheit converter or browse the temperature conversion chart.
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