How to convert degrees Celsius to degrees Fahrenheit
Temperature scales have different zero points, so the conversion multiplies and then adds an offset:
°F = °C × 1.8 + 32
°C = (°F − 32) ÷ 1.8
Example: -18 °C → -18 × 1.8 + 32 = -0.4 °F.
To convert the other way, use the degrees Fahrenheit to degrees Celsius converter.
Everyday values
| Degrees Celsius | Degrees Fahrenheit | For example |
|---|---|---|
| -18 °C | -0.4 °F | a home freezer |
| 0 °C | 32 °F | water freezes |
| 20 °C | 68 °F | room temperature |
| 37 °C | 98.6 °F | normal body temperature |
| 38 °C | 100.4 °F | a fever |
| 100 °C | 212 °F | water boils (sea level) |
| 180 °C | 356 °F | a moderate oven |
When you need this conversion
Weather, cooking and fever are the everyday reasons to convert Celsius to Fahrenheit. A quick estimate is "double it and add 30": 20 °C → 70 °F (exact: 68 °F). For oven temperatures, 180 °C is 356 °F, usually written as 350 °F on recipes, and 200 °C is about 400 °F.
Degree Celsius to degree Fahrenheit conversion table
| °C | °F | °C | °F |
|---|---|---|---|
| -10 °C | 14 °F | 55 °C | 131 °F |
| -5 °C | 23 °F | 60 °C | 140 °F |
| 0 °C | 32 °F | 65 °C | 149 °F |
| 5 °C | 41 °F | 70 °C | 158 °F |
| 10 °C | 50 °F | 75 °C | 167 °F |
| 15 °C | 59 °F | 80 °C | 176 °F |
| 20 °C | 68 °F | 85 °C | 185 °F |
| 25 °C | 77 °F | 90 °C | 194 °F |
| 30 °C | 86 °F | 95 °C | 203 °F |
| 35 °C | 95 °F | 100 °C | 212 °F |
| 40 °C | 104 °F | 105 °C | 221 °F |
| 45 °C | 113 °F | 110 °C | 230 °F |
| 50 °C | 122 °F |
About the units
- Degree Celsius (°C): the kelvin scale shifted by 273.15.
- Degree Fahrenheit (°F): a scale on which water freezes at 32° and boils at 212° at sea level.
Both are units of temperature. The conversion factor comes from the exact definitions above.
Frequently asked questions
What is the formula for degrees Celsius to degrees Fahrenheit?
°F = °C × 1.8 + 32. For example, -18 °C is -0.4 °F.
How do I convert degrees Celsius to degrees Fahrenheit?
Use °F = °C × 1.8 + 32.
What is -18 °C in degrees Fahrenheit?
-18 °C = -0.4 °F.
What is 0 °C in degrees Fahrenheit?
0 °C = 32 °F.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.