Temperature Converter
Convert temperature between fahrenheit, celsius, kelvin.
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What this tool does
Convert temperature between fahrenheit, celsius, kelvin. Temperature requires offset formulas, not simple multiplication. Values below absolute zero are rejected.
How to use the Temperature Converter
- Enter or select value.
- Enter or select from unit.
- Enter or select to unit.
- Read the calculated result; change any measurement to compare alternatives.
Formula
K=C+273.15=(F−32)×5/9+273.15; F=(K−273.15)×9/5+32
- value
- Value
- from
- From unit
- to
- To unit
Temperature requires offset formulas, not simple multiplication. Values below absolute zero are rejected.
Worked example
For temperature converter, the following measurements illustrate the exact method: Value: 32; From unit: fahrenheit; To unit: celsius.
Inputs
- Value32
- From unitFahrenheit
- To unitCelsius
Result
- Converted Celsius0
Temperature conversion factors
| Unit | Factor to common base |
|---|---|
| Fahrenheit | See offset/reciprocal formula |
| Celsius | See offset/reciprocal formula |
| Kelvin | See offset/reciprocal formula |
Results explained
- Converted Celsius
- Converted Celsius from the formula above. Temperature requires offset formulas, not simple multiplication. Values below absolute zero are rejected.
Frequently asked questions
Select the source and target units. The Swap control exchanges them, retaining the equivalent converted value.
Temperature requires offset formulas, not simple multiplication. Values below absolute zero are rejected. The formula and reference table list all supported definitions.
Only units of the same physical quantity are convertible. The selected group's definitions are fixed and do not depend on location.
The formulas use JavaScript double precision. Display rounding can hide trailing digits, but factors are not rounded before computation.
Yes, but the temperature must not be below absolute zero: −273.15 °C, −459.67 °F or 0 K.