Unit Converters
Celsius to Fahrenheit converter.
Type degrees Celsius or Fahrenheit and the other box updates as you type. Negative temperatures work. °F = °C × 1.8 + 32. Runs in your browser; nothing is sent anywhere.
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Result
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Answer
20 °C is 68 °F. The scales meet at -40: -40 °C = -40 °F.
Formula
°F = °C × 1.8 + 32
Take 20 °C. °F = °C × 1.8 + 32 gives 68 °F. Going back: apply the reverse formula to 68 °F to return to 20 °C.
Quick estimate: double the Celsius value and add 30 (it drifts high at larger values).
Celsius to Fahrenheit table (1 to 100)
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| 1 | 33.8 |
| 2 | 35.6 |
| 3 | 37.4 |
| 4 | 39.2 |
| 5 | 41 |
| 6 | 42.8 |
| 7 | 44.6 |
| 8 | 46.4 |
| 9 | 48.2 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 40 | 104 |
| 50 | 122 |
| 60 | 140 |
| 70 | 158 |
| 75 | 167 |
| 80 | 176 |
| 90 | 194 |
| 100 | 212 |
Examples
- 0 °C = 32 °F
- 20 °C = 68 °F
- 37 °C = 98.6 °F
- 100 °C = 212 °F
Source
Conversion factors and formulas: NIST SP 811, Appendix B.9: t/°F relation to t/°C, t/°C = (t/°F - 32)/1.8; NIST Handbook 44 (2026), Appendix C: temperature conversion table. Retrieved 2026-10. Results are rounded for display to 2 decimal places; the arithmetic itself is not rounded.
FAQ
What is the formula to convert degrees Celsius to degrees Fahrenheit?
°F = °C × 1.8 + 32. For 20 °C that gives 68 °F.
What is 37 °C in degrees Fahrenheit?
37 °C is 98.6 °F.
Can I convert negative temperatures?
Yes. The same formula works below zero. For example -10 °C is 14 °F. Both scales read -40 at the same point.
Is there a quick way to estimate it?
Quick estimate: double the Celsius value and add 30 (it drifts high at larger values). Use the exact formula when accuracy matters.
Where do the numbers come from?
The formula is published in NIST Special Publication 811, Appendix B.9, and in NIST Handbook 44, Appendix C. Sources are listed on this page.
Disclaimer
Informational arithmetic using the published factors above. For legal-for-trade, engineering or medical use, check against the governing standard.