Common Temperature Conversions
| From | To | Formula |
|---|
| 0°C (freezing) | Fahrenheit | 32°F |
| 100°C (boiling) | Fahrenheit | 212°F |
| 37°C (body temp) | Fahrenheit | 98.6°F |
| 0°C | Kelvin | 273.15 K |
| -40°C | Fahrenheit | -40°F (same!) |
| 20°C | Fahrenheit | 68°F |
ℹ️ Celsius is based on water's freezing point (0°C) and boiling point (100°C). Fahrenheit is based on a salt-ice mixture (0°F) and human body temperature (~98°F). Kelvin starts at absolute zero (-273.15°C) and is used in science.
Frequently Asked Questions
How to convert Celsius to Fahrenheit?
Formula: °F = (°C × 9/5) + 32. For example, 100°C = (100 × 9/5) + 32 = 212°F. Or use our converter above — just select Celsius as the input and Fahrenheit as the output.
How to convert Fahrenheit to Celsius?
Formula: °C = (°F − 32) × 5/9. For example, 98.6°F = (98.6 − 32) × 5/9 = 37°C (normal body temperature). Use the converter above for instant results.
What is absolute zero?
Absolute zero is -273.15°C (or -459.67°F, or 0 K). It is the theoretical temperature where all molecular motion stops — the lowest possible temperature.
What is Kelvin and why is it used?
Kelvin (K) is an absolute temperature scale used in science and engineering. 0 K is absolute zero. Unlike Celsius and Fahrenheit, Kelvin does not use the degree symbol (°). Conversions: K = °C + 273.15, K = (°F − 32) × 5/9 + 273.15.
What units does this temperature converter support?
This tool converts between 3 temperature units: Celsius (°C), Fahrenheit (°F), and Kelvin (K).
Is this temperature converter free?
Yes. Free to use with no signup or download required.