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Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, and Rankine temperatures instantly. Use the formula table and common reference values for weather, cooking, science, and engineering conversions.
Temperature conversion formulas
| Conversion | Formula |
|---|---|
| Celsius to Fahrenheit | °F = °C x 9/5 + 32 |
| Fahrenheit to Celsius | °C = (°F - 32) x 5/9 |
| Celsius to Kelvin | K = °C + 273.15 |
| Kelvin to Celsius | °C = K - 273.15 |
| Fahrenheit to Rankine | °R = °F + 459.67 |
| Rankine to Fahrenheit | °F = °R - 459.67 |
Common temperature reference table
| Reference point | 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°C | 68°F | 293.15 K |
| Human body temperature | 37°C | 98.6°F | 310.15 K |
| Water boils | 100°C | 212°F | 373.15 K |
Popular temperature conversions
FAQ
What is the difference between Kelvin and Celsius?
Kelvin and Celsius use the same interval size, but Kelvin starts at absolute zero. K = °C + 273.15.
Why does Fahrenheit use 32 and 212 for water?
On the Fahrenheit scale, water freezes at 32°F and boils at 212°F at standard atmospheric pressure.
Can Kelvin be negative?
Physical Kelvin temperatures cannot be below 0 K. The calculator still shows mathematical conversions for entered values.