Celsius to Fahrenheit
Convert °C to °F instantly.
Fahrenheit (°F)
212
Conversion table
| °C | °F |
|---|---|
| -40°C | -40°F |
| -30°C | -22°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 |
| 37°C | 98.6°F |
| 40°C | 104°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 |
| 120°C | 248°F |
| 150°C | 302°F |
| 180°C | 356°F |
| 200°C | 392°F |
| 220°C | 428°F |
| 250°C | 482°F |
How to convert Celsius to Fahrenheit
The formula is °F = (°C × 9/5) + 32. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F). Normal body temperature is 37 °C = 98.6 °F. The two scales are equal at −40°. Need the reverse? Fahrenheit to Celsius →
Built and maintained by Meet Shah · Last updated
What this tool is used for
- Converting a weather forecast for an audience that thinks in Fahrenheit.
- Reading a metric oven or process temperature against an imperial-marked dial.
- Converting a body temperature from a metric thermometer for a US-facing record.
- Checking a specification's operating range against equipment labelled in Fahrenheit.
- Converting a metric recipe temperature for an oven marked in Fahrenheit.
Frequently Asked Questions
- What is the formula?
- F = C × 9/5 + 32. The multiplication must come first; adding 32 before scaling is the single most common arithmetic error. 9/5 is exactly 1.8, so the conversion is exact and not a rounded approximation.
- Where do the two scales cross?
- At −40°, the only temperature where both scales read the same number. It is a genuinely useful sanity check: if your conversion code does not return −40°F for −40°C, the offset and the scale factor are in the wrong order.
- Why is water's boiling point 212°F rather than something round?
- Fahrenheit anchored his scale on a brine freezing point and on human body temperature, not on water. Celsius anchored directly on water's freezing and boiling points at standard pressure, giving 0 and 100. The awkward numbers are an artefact of the older reference points.
- Does this apply to temperature differences too?
- No — and this is a real trap. For a DIFFERENCE you scale only: a rise of 10°C is a rise of 18°F, not 50°F. The +32 offset applies to absolute temperatures, never to intervals.
- Which countries still use Fahrenheit?
- The United States and its territories, plus the Cayman Islands, Liberia and a few others; the UK uses Celsius officially but Fahrenheit persists informally for hot weather. Everywhere else uses Celsius, and science uses Kelvin.
Common errors and gotchas
- Forgetting the offset. Multiplying by 9/5 without adding 32 is wrong everywhere except at zero.
- Applying the offset to a temperature difference, where only the ratio applies and the 32 does not.
- Rounding before adding the offset, which shifts the result by a degree or more.
- Confusing Celsius with Kelvin on a scientific figure, where the offset is 273.15 rather than 32.
- Assuming a negative value behaves differently. The same formula holds; it simply crosses zero.
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