Convert between Celsius, Fahrenheit, and Kelvin instantly. Get accurate results with mathematical formulas shown for every calculation.
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Uses precise thermodynamic formulas for exact conversions.
Includes Kelvin scale, essential for physics and chemistry.
Calculate instantly without reloading the page.
Temperature conversion is frequently used in science, cooking, and travel. Our tool makes it simple to switch between the three major scales: Celsius, Fahrenheit, and Kelvin.
| Celsius to Fahrenheit | (°C × 9/5) + 32 = °F |
| Fahrenheit to Celsius | (°F − 32) × 5/9 = °C |
| Celsius to Kelvin | °C + 273.15 = K |
| Kelvin to Celsius | K − 273.15 = °C |
Average normal body temperature is generally accepted as 98.6°F (37°C). Some studies suggest it can vary slightly.
Kelvin is an absolute temperature scale starting at absolute zero, making it ideal for scientific calculations where negative temperatures are problematic.
Celsius and Fahrenheit are equal at -40 degrees (-40°C = -40°F).
Enter a value, pick from and to units, and convert between Celsius, Fahrenheit and Kelvin.
0 °C equals 32 °F and 273.15 K.
Results are rounded for display; use full precision for scientific work.