Temperature Converter — Celsius, Fahrenheit, Kelvin
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. See all three scales at once with a visual thermometer indicator.
Water boils at 100°C
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Water boils at 212°F
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Absolute zero = 0 K
Common temperatures:
100°C 75°C 50°C 25°C 0°C -25°C
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Celsius
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Fahrenheit
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Kelvin
Temperature Reference Points
| Description | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute Zero | -273.15°C | -459.67°F | 0 K |
| Water Freezes | 0°C | 32°F | 273.15 K |
| Room Temperature | 20–22°C | 68–72°F | 293–295 K |
| Body Temperature | 37°C | 98.6°F | 310.15 K |
| Fever | 38°C+ | 100.4°F+ | 311.15 K+ |
| Water Boils | 100°C | 212°F | 373.15 K |
| Lagos Average High | 32°C | 89.6°F | 305.15 K |
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 (or 1.8), then add 32. Formula: °F = (°C × 9/5) + 32. For example, 100°C = (100 × 1.8) + 32 = 212°F (boiling point of water).
How do I convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit value, then multiply by 5/9. Formula: °C = (°F − 32) × 5/9. For example, 98.6°F = (98.6 − 32) × 5/9 = 37°C (normal body temperature).
What is Kelvin and how do I convert from Celsius?
Kelvin is the SI base unit of temperature. To convert Celsius to Kelvin, add 273.15. So 0°C = 273.15 K (freezing point of water) and 100°C = 373.15 K (boiling point).
What is absolute zero?
Absolute zero is the lowest theoretically possible temperature: 0 Kelvin = −273.15°C = −459.67°F. At this temperature, all molecular motion stops.
What is normal body temperature in Celsius and Fahrenheit?
Normal human body temperature is 37°C or 98.6°F. A fever is generally considered to be above 38°C (100.4°F).