Temperature Converter

Convert between Celsius (°C), Fahrenheit (°F) and Kelvin (K).

Updated September 2026

Result—
Celsius
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Fahrenheit
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Kelvin
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Temperature conversion formulas

°F = °C × 9/5 + 32 °C = (°F − 32) × 5/9 K = °C + 273.15

Quick reference

CelsiusFahrenheitWhat it is
−40 °C−40 °FWhere both scales meet
0 °C32 °FWater freezes
25 °C77 °FRoom temperature
37 °C98.6 °FNormal body temperature
38 °C100.4 °FFever threshold (commonly used)
45 °C113 °FSevere heatwave in North India
100 °C212 °FWater boils (sea level)
180 °C356 °FModerate oven for baking

Quick mental conversion

To estimate °F from °C, double it and add 30: 25 °C ≈ 80 °F (exact: 77 °F). To go the other way, subtract 30 and halve.

Frequently asked questions

What is 98.6 °F in Celsius?

Exactly 37 °C, the traditional normal human body temperature.

Why is there no degree sign with Kelvin?

Kelvin is an absolute scale starting at absolute zero, so values are written simply as K, for example 300 K.

Conversions use standard factors and are for general information. Exchange rates are indicative and may differ from rates offered by banks.