Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin. Enter a temperature, choose the scales and get the exact result along with the formula used.
25 °C is 77 °F.
| Celsius | 25 °C |
|---|---|
| Fahrenheit | 77 °F |
| Kelvin | 298.15 K |
Converted in your browser using the exact formulas. Values below absolute zero are rejected.
How to Convert Celsius to Fahrenheit
Unlike most units, temperature scales have different zero points, so converting needs a multiplication and an addition. Multiply the Celsius temperature by 9/5 (1.8), then add 32.
- 125 × 9/5 = 45
- 245 + 32 = 77
Therefore: 25 °C is 77 °F.
How to Convert Fahrenheit to Celsius
Reverse the steps: subtract 32 from the Fahrenheit temperature, then multiply by 5/9. Kelvin uses the same size of degree as Celsius but starts at absolute zero, so K = °C + 273.15.
Reference Temperatures
| Description | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute zero | −273.15 °C | −459.67 °F | 0 K |
| Celsius and Fahrenheit meet | −40 °C | −40 °F | 233.15 K |
| Water freezes | 0 °C | 32 °F | 273.15 K |
| Room temperature | 20 °C | 68 °F | 293.15 K |
| Body temperature | 37 °C | 98.6 °F | 310.15 K |
| Water boils (sea level) | 100 °C | 212 °F | 373.15 K |
When Is a Temperature Converter Useful?
- Oven and cooking temperatures
- Weather forecasts abroad
- Body temperature readings
- Science and lab work
- Travel planning
- Gardening and growing guides
Frequently Asked Questions
180 °C is 356 °F: 180 × 9/5 = 324, and 324 + 32 = 356. It is a common oven temperature.
At −40. −40 °C is exactly −40 °F.
Kelvin is an absolute scale in the International System of Units, so temperatures are written as “300 K”, not “300 °K”.
No. Absolute zero (0 K, −273.15 °C or −459.67 °F) is the lowest possible temperature, so the converter rejects anything colder.