Celsius to Fahrenheit Converter
Celsius (°C) → Fahrenheit (°F)
Also: 373.15 K Kelvin · 671.67 °R Rankine
Show Your Work
- 1. F = (9/5) × 100 + 32
- 2. F = 180 + 32
- 3. F = 212°F
About this conversion
Celsius to Fahrenheit is the most-searched temperature conversion on the web. The conversion is exact — F = (9/5)C + 32 — because both scales are linear with fixed reference points (water freezes at 0°C / 32°F and boils at 100°C / 212°F at standard pressure). This page is built around that single direction: enter a Celsius value, see the Fahrenheit answer instantly, with the worked steps copyable and a static reference table for the values readers most often look up.
Celsius to Fahrenheit Reference Table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -30 | -22 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 22 | 71.6 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 40 | 104 |
| 50 | 122 |
| 60 | 140 |
| 70 | 158 |
| 80 | 176 |
| 90 | 194 |
| 100 | 212 |
| 120 | 248 |
| 150 | 302 |
| 175 | 347 |
| 180 | 356 |
| 200 | 392 |
| 220 | 428 |
| 250 | 482 |
| 300 | 572 |
| 350 | 662 |
| 400 | 752 |
When to use Celsius → Fahrenheit
- Following a recipe written in Celsius (most baking and roasting outside the U.S.) when your oven reads in Fahrenheit
- Converting a weather forecast from a metric source (BBC, ECMWF) for use in the U.S.
- Reading scientific or product specifications written in Celsius
- Converting body temperature readings between an analog (°C) and digital (°F) thermometer
Worked Example
A baking recipe calls for a 180°C oven. What is that in Fahrenheit?
- Start with the Celsius value: C = 180.
- Multiply by 9/5 (or 1.8): 180 × 1.8 = 324.
- Add 32: 324 + 32 = 356.
- So 180°C = 356°F.
180°C / 356°F is a common baking temperature for cookies, cakes, and roasted vegetables. The mental shortcut would have given 2×180 + 30 = 390 — close enough to know it's a hot oven, but use the exact formula when timing matters.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
F = (9/5)C + 32, also written as F = 1.8C + 32. Multiply the Celsius value by 9/5, then add 32.
What is 0°C in Fahrenheit?
0°C = 32°F. This is the freezing point of water at standard atmospheric pressure, by definition of both scales.
What is 100°C in Fahrenheit?
100°C = 212°F. This is the boiling point of water at standard atmospheric pressure (1 atm).
What is 37°C in Fahrenheit?
37°C = 98.6°F. This is normal human body temperature — the source of the 98.6°F number used in U.S. medicine.
Is there a quick mental shortcut?
Double the Celsius value and add 30: F ≈ 2C + 30. This is accurate to within 2-3°F for most everyday temperatures and is precise enough to judge whether you need a coat. Use the exact formula F = 1.8C + 32 when you need the right answer.
At what temperature do Celsius and Fahrenheit show the same number?
-40°. Setting C = F in the conversion formula gives -40°C = -40°F as the unique crossover point. This is occasionally used as a sanity check when calibrating instruments that report both scales.
More Temperature Conversions
- Fahrenheit to Celsius — the reverse direction
- Celsius to Kelvin — same starting scale, different target
- Celsius to Rankine — same starting scale, different target
- Kelvin to Fahrenheit — different starting scale, same target
- Rankine to Fahrenheit — different starting scale, same target
- All-scale Temperature Converter — see Celsius, Fahrenheit, Kelvin, and Rankine at once
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