Fahrenheit to Celsius (Fahrenheit to Celsius)
Result
-17.22222222 Celsius
Formula
Celsius = Fahrenheit × 0.5555555556 − 17.77777778
Kitchen volumes here are US customary measures: 1 cup = 236.588 mL, 1 tablespoon = 14.787 mL, 1 teaspoon = 4.929 mL, 1 fluid ounce = 29.574 mL. Weights use the avoirdupois ounce and pound.
Worked examples
- 1 Fahrenheit × 0.5555555556 − 17.77777778 = -17.222222 Celsius
- 10 Fahrenheit × 0.5555555556 − 17.77777778 = -12.222222 Celsius
- 100 Fahrenheit × 0.5555555556 − 17.77777778 = 37.777778 Celsius
Common mistakes
- Cups measure volume and grams measure weight. Converting between them depends on the ingredient: a cup of flour weighs roughly 120–130 g, a cup of sugar about 200 g.
- Cup sizes vary: US customary 236.6 mL, US nutrition label 240 mL, metric (Australia, Canada, UK recipes) 250 mL.
- An Australian tablespoon is 20 mL (four teaspoons), not 15 mL.
Fahrenheit to Celsius table
| Fahrenheit (Fahrenheit) | Celsius (Celsius) |
|---|---|
| 1 | -17.222222 |
| 2 | -16.666667 |
| 5 | -15 |
| 10 | -12.222222 |
| 20 | -6.6666667 |
| 50 | 10 |
| 100 | 37.777778 |
| 1,000 | 537.77778 |
The units
- Fahrenheit (Fahrenheit)
- A unit of cooking.
- Celsius (Celsius)
- A unit of cooking.
Sources for these factors
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- 21 CFR 101.9 (nutrition labeling: household measure equivalents) — U.S. FDA / eCFR
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy