June 2, 2026 · 4 min read
Celsius to Fahrenheit Formula (Plus a Free Converter)
The simple formula to convert °C to °F (and back), with a free instant converter that also handles Kelvin.
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°F = °C × 9/5 + 32. Reverse: °C = (°F − 32) × 5/9. Kelvin: K = °C + 273.15.
Our Temperature Converter handles all three scales in one go.
Quick reference
- 0°C = 32°F (water freezes)
- 100°C = 212°F (water boils at sea level)
- 37°C ≈ 98.6°F (body temp)
- −40°C = −40°F (the only matching point)
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