Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin — type in any field and the others update instantly.

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°C — Water freezes at 0°C, boils at 100°C
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°F — Water freezes at 32°F, boils at 212°F
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K — Absolute zero is 0K (-273.15°C)

Conversion Formulas

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

Quick Reference

Condition°C°FK
Absolute zero-273.15-459.670
Water freezes032273.15
Body temp3798.6310.15
Water boils100212373.15

How to Convert Temperatures

The three most common temperature scales are Celsius (used globally), Fahrenheit (used in the US), and Kelvin (used in science). This converter updates all three as you type in any field, so you never need to remember the formulas.

Celsius to Fahrenheit

Multiply by 9/5 (or 1.8) and add 32. For example, 37°C × 1.8 + 32 = 98.6°F (human body temperature). The two scales meet at -40° — both -40°C and -40°F are the same temperature.

FAQ

°F = (°C × 9/5) + 32. Example: 37°C = 98.6°F.
The lowest possible temperature: 0K = -273.15°C = -459.67°F. All molecular motion stops.