Temperature converter
Temperature Converter – 4 Units, Exact Factors
1 degree Celsius = 33.8 degrees Fahrenheit
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- 1 °C = 33.8 °F
- 5 °C = 41 °F
- 10 °C = 50 °F
- 25 °C = 77 °F
- Degrees Celsius°C
- Degrees Fahrenheit (US)°F
- KelvinK
- Degrees Rankine°R
- Degrees Celsius1°C
- Degrees Fahrenheit (US)33.8°F
- Kelvin274.15K
- Degrees Rankine493.47°R
About temperature conversions
Temperature scales have different zero points, so conversions add or subtract an offset as well as scaling. We handle that exactly.
Common temperature conversions
Temperature units explained
| Unit | System | Definition and notes |
|---|---|---|
| Degree Celsius (°C) | SI (metric) | Celsius uses the same step size as kelvin, shifted so water freezes at 0 °C: °C = K − 273.15. |
| Degree Fahrenheit (°F) | US customary | Fahrenheit puts water’s freezing point at 32 °F and boiling point at 212 °F: °F = °C × 9/5 + 32. |
| Kelvin (K) | SI (metric) | The SI base unit of temperature. 0 K is absolute zero, the coldest anything can get. |
| Degree Rankine (°R) | other | An absolute scale like kelvin but with Fahrenheit-sized steps: °R = K × 9/5. |
Degrees Celsius to degrees Fahrenheit conversion table
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 °C | −40 °F |
| -20 °C | −4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 5 °C | 41 °F |
| 10 °C | 50 °F |
| 15 °C | 59 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 35 °C | 95 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 50 °C | 122 °F |
| 60 °C | 140 °F |
| 80 °C | 176 °F |
| 100 °C | 212 °F |
| 150 °C | 302 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
Frequently asked questions
Which temperature units can I convert?
degrees Celsius (°C), degrees Fahrenheit (°F), kelvin (K), degrees Rankine (°R).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.
Why is temperature conversion not a simple multiplication?
Celsius and Fahrenheit have different zero points, so converting requires an offset as well as a scale factor: °F = °C × 9/5 + 32. Kelvin and Rankine start at absolute zero.