Celsius to Fahrenheit Converter
Enter a Celsius temperature to get Fahrenheit. For a quick check, 20 °C is 68 °F, 37 °C is 98.6 °F and 180 °C is 356 °F. Decimals and negative readings are welcome.
Convert one temperature
One number only, such as 25, 36.5 or -10. Use a decimal point.
Fahrenheit (°F)
Automatic keeps up to 6 decimal places. ≈ marks a rounded answer.
(25 × 9/5) + 32 = 77 °F
180 °C is 356 °F, not exactly 350 °F
A recipe may round 180 °C to 350 °F because an oven dial uses fixed steps. The exact conversion is 356 °F. If your oven accepts 5 °F steps, 355 °F is the nearest setting; if it accepts 25 °F steps, 350 °F is nearest. The calculator leaves that choice to you instead of silently changing the answer.
Keep the oven mode with the number. “180 °C fan” converts to 356 °F in the same mode, not a conventional-oven setting. Check the recipe and your oven's instructions before adjusting for convection. Some models make that adjustment automatically.
Build a quick feel for a Celsius forecast
Remember three points: 10 °C = 50 °F, 20 °C = 68 °F and 30 °C = 86 °F. Each 5 °C step adds 9 °F, so 25 °C lands at 77 °F. A negative Celsius reading is not necessarily negative in Fahrenheit: -10 °C is 14 °F.
Can I just double Celsius and add 30?
Only for a rough estimate. At 20 °C, that shortcut gives 70 °F instead of 68 °F. At 30 °C, it gives 90 °F instead of 86 °F. The error grows as you move away from 10 °C; use the calculator for recipes, recorded measurements or any precise value.
Celsius to Fahrenheit conversion chart
These values are exact, with no rounding. Save the chart or open the text table to copy a temperature.
Open the copyable conversion table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -10 | 14 |
| 0 | 32 |
| 10 | 50 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 37 | 98.6 |
| 38 | 100.4 |
| 100 | 212 |
| 180 | 356 |
| 200 | 392 |
The Celsius to Fahrenheit formula
°F = (°C × 9/5) + 32. Multiply by 1.8, then add 32. For example, 37 × 1.8 + 32 gives 98.6 °F. “Centigrade” is the older name for Celsius, so it uses the same calculation.
For a change of 5 °C, multiply by 1.8 only: the change is 9 °F. Adding 32 is for converting a reading, not an increase or decrease. This tool accepts readings down to absolute zero, -273.15 °C, which equals -459.67 °F.
Rounding changes the displayed answer, not the underlying formula. Very small or large results use scientific notation. Converting a thermometer reading changes its units; it does not assess health or make the measurement more precise.