Decision tools built for clarity
Temperature Converter
Convert a temperature between Celsius, Fahrenheit, and Kelvin.
Enter a temperature, select its current unit and target unit, and convert it.
Methodology
Formula or transformation
Transforms the submitted temperature through Celsius using the standard Celsius, Fahrenheit, and Kelvin relationships.
Variables
- Submitted temperature
- Source temperature unit
- Target temperature unit
Units
- Celsius
- Fahrenheit
- Kelvin
Rounding policy
The converted temperature is rounded to the declared result scale using half away from zero.
Temperature readings are transformed through Celsius using standard scale relationships.
Convert temperature readings among Celsius, Fahrenheit, and Kelvin while enforcing absolute zero.
Reviewed sources
- NIST — SI units: temperature Reviewed on 2026-09-04
Formula review history
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Initial formula and source review.
Reviewed 2026-09-02 for formula version nist-temperature-v1
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Confirmed formula identity, sources, rounding, and public disclosure.
Reviewed 2026-09-04 for formula version nist-temperature-v1
Assumptions
- The submitted value is a temperature reading, not a temperature interval.
- Celsius, Fahrenheit, and Kelvin use their standard scale relationships.
Limitations
- Display rounding can hide additional decimal precision.
- The converter does not adjust for instrument accuracy or measurement uncertainty.
Worked example
A reading of 32 degrees Fahrenheit converts to 0 degrees Celsius under the standard scale relationship.
Frequently asked questions
Can Kelvin be negative?
Physical temperatures below absolute zero are not accepted.
Does conversion change measurement accuracy?
No. Conversion changes the unit, not the quality of the original measurement.