45°C in °F
45°C is 113°F. To convert Celsius to Fahrenheit, multiply by 1.8, then add 32.
Formula from NIST.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| Multiply by 1.8 | 45 × 1.8 | 81 |
| Add 32 | 81 + 32 | 113 °F |
Where the figures come from
- Fahrenheit reading at the freezing point used in the conversion: 32 °F. Source: NIST Guide to the SI, Appendix B.9: factors for units listed by kind of quantity. Checked 14 November 2026.
- Fahrenheit degrees in one Celsius degree: 1.8. Source: NIST Guide to the SI, Appendix B.9: factors for units listed by kind of quantity. Checked 14 November 2026.
Nearby temperatures
| °C | °F |
|---|---|
| 37°C | 98.6°F |
| 38°C | 100.4°F |
| 39°C | 102.2°F |
| 40°C | 104°F |
| 41°C | 105.8°F |
| 42°C | 107.6°F |
| 45°C | 113°F |
| 50°C | 122°F |
| 60°C | 140°F |
| 70°C | 158°F |
| 80°C | 176°F |
| 90°C | 194°F |
| 100°C | 212°F |
How to convert Celsius to Fahrenheit
The US National Institute of Standards and Technology gives the conversion as °C = (°F − 32) ÷ 1.8. So to go from °C to °F, multiply by 1.8, then add 32. For example, 45°C is 113°F. See NIST's table.
The two scales meet at −40, where −40°C and −40°F are the same temperature.