Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin using the exact conversion formulas.
1 Celsius = 33.8 Fahrenheit
1 Celsius in other units
| Fahrenheit (°F) | 33.8 |
| Kelvin (K) | 274.15 |
How to use the Temperature Converter
- Pick the temperature scale you are starting from (Celsius, Fahrenheit or Kelvin).
- Enter the temperature value — negative values are allowed.
- Pick the scale you want to convert to.
- The converted temperature appears immediately.
Examples
| Input | Output | Notes |
|---|---|---|
0 °C | 32 °F | Freezing point of water. 0 °C = 273.15 K |
100 °C | 212 °F | Boiling point of water at sea level |
98.6 °F | 37 °C | Normal human body temperature |
180 °C | 356 °F | A common baking temperature |
The three temperature scales
Celsius (°C) sets 0 at water's freezing point and 100 at its boiling point. Fahrenheit (°F) sets those points at 32 and 212. Kelvin (K) is the SI base unit and starts at absolute zero, with the same step size as Celsius.
Conversion formulas
| Convert | Formula |
|---|---|
| °C → °F | °F = °C × 9/5 + 32 |
| °F → °C | °C = (°F − 32) × 5/9 |
| °C → K | K = °C + 273.15 |
| K → °C | °C = K − 273.15 |
Quick reference points
- Absolute zero: −273.15 °C / −459.67 °F / 0 K
- Water freezes: 0 °C / 32 °F
- Room temperature: ~21 °C / ~70 °F
- Body temperature: 37 °C / 98.6 °F
- Water boils: 100 °C / 212 °F
Frequently asked questions
What is the formula to convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 (or 1.8) and add 32: °F = °C × 9/5 + 32. For example, 25 °C × 1.8 + 32 = 77 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit value, then multiply by 5/9: °C = (°F − 32) × 5/9. For example, (68 − 32) × 5/9 = 20 °C.
How is Kelvin related to Celsius?
Kelvin uses the same degree size as Celsius but starts at absolute zero. K = °C + 273.15, and °C = K − 273.15. There are no negative Kelvin temperatures.
At what temperature are Celsius and Fahrenheit equal?
At −40 degrees. −40 °C and −40 °F are the same temperature, which is the only point where the two scales cross.
What is absolute zero?
Absolute zero is the lowest possible temperature: 0 K, which is −273.15 °C or −459.67 °F. At this point molecular motion is at its theoretical minimum.