Instantly convert between Celsius (°C) and Fahrenheit (°F) using internationally recognised conversion formulas. Ideal for weather forecasts, travel, cooking, science, engineering and everyday temperature conversions.
✔ Celsius ⇄ Fahrenheit • ✔ Instant conversion • ✔ Accurate formulas • ✔ Free converter
The Celsius ⇄ Fahrenheit Converter quickly converts temperatures between the two most widely used temperature scales. Whether you're checking an overseas weather forecast, following an international recipe, monitoring engine temperatures, or studying science, this calculator provides fast and accurate conversions.
The converter supports both directions:
Simply enter a temperature, choose the conversion direction, and the result is calculated instantly.
Celsius and Fahrenheit measure the same physical quantity but use different reference points.
Used by almost every country worldwide as part of the metric system.
Primarily used in the United States and a few other territories.
°F = (°C × 9 ÷ 5) + 32
°C = (°F − 32) × 5 ÷ 9
| Celsius | Fahrenheit | Description |
|---|---|---|
| -20°C | -4°F | Very cold winter weather |
| 0°C | 32°F | Water freezes |
| 10°C | 50°F | Cool day |
| 20°C | 68°F | Comfortable room temperature |
| 30°C | 86°F | Warm summer day |
| 40°C | 104°F | Very hot weather |
| 100°C | 212°F | Water boils |
Understand forecasts from countries using different temperature scales.
Convert recipe temperatures for ovens and cooking guides.
Perform laboratory, engineering and educational calculations.
Interpret coolant, engine and climate-control temperatures.
This calculator uses the standard international conversion formulas to provide fast and accurate temperature conversions every time.
Which countries use Celsius?
Most countries worldwide use Celsius for everyday temperature measurements.
Which countries use Fahrenheit?
Fahrenheit is primarily used in the United States and a small number of other territories.
What is room temperature?
Room temperature is generally considered to be between 20°C and 22°C (68°F to 72°F).
At what temperature do Celsius and Fahrenheit become equal?
The two scales are equal at -40°.
Is this converter accurate?
Yes. It uses the internationally accepted temperature conversion formulas.
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Last Updated: August 2026