Temperature Converter
Celsius, Fahrenheit, and Kelvin.
Inputs
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Formula
°F = (°C × 9/5) + 32 · K = °C + 273.15
Temperature doesn't scale like length — you can't multiply by a single factor. The calculator first converts to Celsius, then to the target scale. Fahrenheit and Kelvin offsets are applied after the Celsius value is known.
Worked example
25 °C is 77 °F — a comfortable room temperature in India (Celsius) translated for a US weather forecast or thermostat.
Where this can give the wrong answer
- Absolute zero is −273.15 °C / 0 K / −459.67 °F; inputs below that are physically impossible but still compute.
- Kelvin never uses a degree symbol in science writing, though people often say 'degrees Kelvin' colloquially.
- Rounding to one decimal (as the input step allows) can make 0 °C show as 32.0 °F vs exactly 32 — both are correct.
FAQ
- Fahrenheit and Celsius were defined on different reference points and step sizes. The (× 9/5) + 32 formula is the standard algebraic link, not a simple ratio.