Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
About this tool
Cooking an American recipe at 350°F but your oven uses Celsius? Reading a European weather forecast and need Fahrenheit equivalents? The Temperature Converter handles all three major scales instantly.
How the Temperature Converter works
The Temperature Converter converts between Celsius (°C), Fahrenheit (°F), and Kelvin (K). It uses the exact formulas: °F = (°C × 9/5) + 32 and K = °C + 273.15. Kelvin is the SI base unit of temperature used in science.
How to use this tool
- Enter the temperature value.
- Select the source scale from the 'From' dropdown.
- Select the target scale from the 'To' dropdown.
- Click 'Convert' to see the result.
Common use cases
Converting recipe oven temperatures between Fahrenheit and Celsius
Understanding weather temperatures when traveling abroad
Converting scientific data between Celsius and Kelvin
Checking if a fever temperature in Fahrenheit is concerning (convert to Celsius if needed)
Examples
- 350°F (common baking temperature) = 176.7°C. 100°C (boiling water) = 212°F = 373.15 K.
- 0°C (freezing) = 32°F. 37°C (body temperature) = 98.6°F. −40°C = −40°F (the only equal point).
Tips & best practices
- Mental math shortcut: °C to °F — double and add 30. 20°C → 40 + 30 = 70°F (exact: 68°F). Close enough for weather.
- Mental math shortcut: °F to °C — subtract 30 and halve. 80°F → 50 ÷ 2 = 25°C (exact: 26.7°C).
- 0 Kelvin is absolute zero (−273.15°C), the theoretical minimum temperature where molecular motion stops.
- For fan/convection ovens, reduce the recipe's conventional oven temperature by 20°C (or 25°F).
Common mistakes to avoid
❌ Confusing the temperature scales — °C and °F use different zero points and different degree sizes. 50°C is NOT 'a bit warmer than 50°F' — it is 122°F.
❌ Forgetting that Kelvin does not use the degree symbol — it is 300 K, not 300°K.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 then add 32. For example, 20°C → (20 × 9/5) + 32 = 68°F.
What is absolute zero?
0 Kelvin = −273.15°C = −459.67°F. It is the theoretical temperature at which all molecular motion ceases.
What temperature is the same in Celsius and Fahrenheit?
−40°C = −40°F. This is the only temperature where both scales show the same number.
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