How do I convert Celsius to Fahrenheit?
Multiply Celsius by 9/5 and add 32. For example, 20°C × 9/5 + 32 equals 68°F.
Temperature Converter (°C, °F, K, °R)
Instantly convert between Celsius, Fahrenheit, Kelvin, and Rankine with live calculation formulas and reference charts.
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Quick Presets:
Formula reference
Common temperature conversions
Celsius to Fahrenheit
(°C × 9/5) + 32 = °F
To convert Celsius to Fahrenheit, multiply the temperature value by 9/5 (or 1.8), then add 32 to the result.
Fahrenheit to Celsius
(°F − 32) × 5/9 = °C
To convert Fahrenheit to Celsius, subtract 32 from the temperature, then multiply by 5/9 (or divide by 1.8).
Celsius to Kelvin
°C + 273.15 = K
To convert Celsius to Kelvin, simply add 273.15 to the Celsius temperature.
Celsius to Fahrenheit conversion milestones
| Milestone Description | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| Equal temperature point | -40 °C | -40 °F |
| Freezing point of water | 0 °C | 32 °F |
| 10°C conversion | 10 °C | 50 °F |
| Room temperature | 20 °C | 68 °F |
| Warm room temperature | 25 °C | 77 °F |
| Normal human body temperature | 37 °C | 98.6 °F |
| Boiling point of water | 100 °C | 212 °F |
What can the Temperature Converter (°C, °F, K, °R) do?
Convert temperatures instantly between Celsius, Fahrenheit, Kelvin, and Rankine. The calculator updates as you type and includes formulas and common reference values for quick verification.
- Celsius, Fahrenheit, Kelvin, and Rankine
- Instant bidirectional calculations
- Conversion formulas and reference table
How to use the Temperature Converter (°C, °F, K, °R)
- 1
Enter the temperature value.
- 2
Select the source and destination temperature scales.
- 3
Read the converted result and use the formula section to verify the calculation.
Frequently Asked Questions
How do I convert Fahrenheit to Celsius?
Subtract 32 from Fahrenheit and multiply the result by 5/9. For example, 68°F equals 20°C.
What is absolute zero in Celsius and Kelvin?
Absolute zero is 0 Kelvin, which is equal to −273.15 degrees Celsius.