Temperature converter
Convert Celsius, Fahrenheit, Kelvin, Rankine and Réaumur.
°C
°F
K
°R
°Ré
Values below absolute zero (0 K = −273.15 °C = −459.67 °F) are rejected. Rankine is the absolute scale with Fahrenheit-sized degrees; Réaumur sets water's boiling point at 80°.
How it works
Temperature scales differ in both step size and zero point, so converting needs an offset as well as a factor. Kelvin and Rankine start at absolute zero.
Formulas
- °F = °C · 1.8 + 32
- K = °C + 273.15
- °R = K · 1.8
- °Ré = °C · 0.8
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