Converters
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine.
Celsius—°C
Fahrenheit—°F
Kelvin—K
Rankine—°R
Formula used
Conversion Formulas
| From | To °C | To °F |
|---|---|---|
| °C | — | (°C × 9/5) + 32 |
| °F | (°F − 32) × 5/9 | — |
| K | K − 273.15 | (K − 273.15) × 9/5 + 32 |
| °R | (°R − 491.67) × 5/9 | °R − 459.67 |
Reference Points
| Event | °C | °F | K |
|---|---|---|---|
| Absolute zero | −273.15 | −459.67 | 0 |
| Water freezes | 0 | 32 | 273.15 |
| Room temp | 20–22 | 68–72 | 293–295 |
| Body temp | 37 | 98.6 | 310.15 |
| Water boils | 100 | 212 | 373.15 |
| Equal point | −40 | −40 | 233.15 |
Scale Comparison
Celsius — metric standard. Water freezes 0°, boils 100°.
Fahrenheit — US customary. Water freezes 32°, boils 212°.
Kelvin — SI unit. Absolute zero = 0 K. No negative values. Used in science.
Rankine — absolute scale like Kelvin but in Fahrenheit degrees. Used in US engineering.
°C and °F are equal at −40°. Kelvin = °C + 273.15.