Celsius ↔ Fahrenheit Converter (°C to °F)
Convert between Celsius and Fahrenheit temperature scales with precision and advanced features
| Amount | Fahrenheit |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 100 °C | 212 °F |
More Temperature Unit Converters
Explore more temperature conversions between Celsius, Fahrenheit and Kelvin for fast, accurate results every time.
Celsius to Fahrenheit Converter: °C to °F and °F to °C
This Celsius to Fahrenheit converter changes a temperature between Celsius (°C) and Fahrenheit (°F) instantly, in both directions. Type a value or move the slider and the answer updates as you go, so students, travelers, cooks and professionals can skip the manual calculation and avoid mistakes. It also shows the formula, a reference table and the difference between two temperatures.
Quick answer: 0 °C is 32 °F, 25 °C is 77 °F, 37 °C is 98.6 °F and 100 °C is 212 °F. To convert any temperature, multiply the Celsius value by 1.8 and add 32.
What Is Celsius?
Celsius is a temperature scale based on the freezing and boiling points of water. On this scale water freezes at 0 °C and boils at 100 °C under normal atmospheric pressure. It is the most widely used scale in the world and the standard for science, weather reports, medicine and daily life in most countries.
What Is Fahrenheit?
Fahrenheit is the temperature scale used mainly in the United States. Water freezes at 32 °F and boils at 212 °F, so there are 180 degrees between the two points instead of 100. Fahrenheit is used for weather forecasts, cooking and household temperatures wherever the imperial system is followed.
Celsius to Fahrenheit Formula
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32:
Example: if the temperature is 25 °C, then °F = (25 × 9/5) + 32 = 77 °F.
Fahrenheit to Celsius Formula
To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9:
Example: if the temperature is 77 °F, then °C = (77 − 32) × 5/9 = 25 °C.
Celsius to Fahrenheit Chart
These everyday values use the exact formula, so they match the converter above:
| Celsius | Fahrenheit |
|---|---|
| -40 °C | -40 °F |
| -18 °C | -0.4 °F |
| 0 °C | 32 °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 |
| 100 °C | 212 °F |
| Fahrenheit | Celsius |
|---|---|
| 0 °F | -17.8 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 72 °F | 22.2 °C |
| 86 °F | 30 °C |
| 98.6 °F | 37 °C |
| 104 °F | 40 °C |
| 212 °F | 100 °C |
| 350 °F | 176.7 °C |
For a fast estimate in your head, double the Celsius value and add 30. It is not exact, but it is usually within a few degrees for everyday weather. If you also need Kelvin, the full temperature converter handles all three scales.
Who Uses This Converter?
Students learning temperature conversions and the teachers who set the homework use it, as do scientists and researchers. Travelers visiting a country with a different system use it to read a weather forecast, and home cooks and bakers use it to follow an oven setting in a recipe. Engineers, technicians and weather analysts use it for specifications and reports.
What Is This Converter Used For?
People use it to convert weather temperatures, to check academic and scientific calculations, and to adjust cooking and baking temperatures. It is also used for body temperature reference, for comparing climates before a trip, and for engineering and industrial measurements. For other units, see the length converter, the weight converter or the unit converter, which brings every category together.
How to Use the Celsius to Fahrenheit Converter
Choose the scale
Select Celsius or Fahrenheit as the input unit, or press the swap button to reverse the direction.
Enter the temperature
Type a value, move the slider, or tap a quick card such as water freezing or boiling.
Read the result
The converted temperature appears instantly. Press the convert button if you prefer to confirm it.
Explore the extras
Open Temperature Difference, Formula, Reference or Comparison to see the gap between two readings, the equation or everyday temperatures.