Fahrenheit to Celsius
°C = (°F − 32) × 5/9. Find a Fahrenheit reading in the chart, from −40 °F up to oven heat, or type your own value.
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Key Formula
°C = (°F − 32) × 5/9
°F = (°C × 9/5) + 32
Fahrenheit → Celsius
| °F | °C |
|---|---|
| -40 °F | -40.0 °C |
| -22 °F | -30.0 °C |
| -4 °F | -20.0 °C |
| 14 °F | -10.0 °C |
| 23 °F | -5.0 °C |
| 32 °F | 0.0 °C |
| 41 °F | 5.0 °C |
| 50 °F | 10.0 °C |
| 59 °F | 15.0 °C |
| 68 °F | 20.0 °C |
| °F | °C |
|---|---|
| 77 °F | 25.0 °C |
| 86 °F | 30.0 °C |
| 98.6 °F | 37.0 °C |
| 104 °F | 40.0 °C |
| 122 °F | 50.0 °C |
| 140 °F | 60.0 °C |
| 176 °F | 80.0 °C |
| 212 °F | 100.0 °C |
| 302 °F | 150.0 °C |
| 392 °F | 200.0 °C |
Reading a temperature in Celsius? Convert °C to °F
How to convert Fahrenheit to Celsius
°C = (°F − 32) × 5/9
Subtract the 32-degree offset first, then scale down: one Fahrenheit degree is 5/9 of a Celsius degree. Dividing by 1.8 gives the same result.
100 °F
- 100 − 32 = 68
- 68 × 5/9 = 37.8 °C
350 °F (a common oven setting)
- 350 − 32 = 318
- 318 ÷ 1.8 = 176.7 °C
What is the Fahrenheit scale?
A Fahrenheit degree is 5/9 of a Celsius degree (NIST gives the interval factor as 5.555 556 × 10⁻¹), and the scale is offset so that t/°C = (t/°F − 32)/1.8.
Working that formula through, 0 °C lands on 32 °F and 100 °C on 212 °F, and the two scales cross at −40, the only value that reads the same on both.
Source: NIST Guide to the SI, Appendix B.9: Factors for units listed by kind of quantity or field of science (retrieved 2026-09-29)
References
Where the Fahrenheit-to-Celsius formula is published.
FAQ
(98.6 − 32) × 5/9 = 37 °C.
−40 °C: (−40 − 32) × 5/9 = −40, the point where both scales agree.
(−10 − 32) × 5/9 = −23.3 °C.
Subtract 32, then multiply by 5/9 (or divide by 1.8). For 212 °F: 180 × 5/9 = 100 °C.