Celsius to Fahrenheit (°C to °F)
Result
33.8 Fahrenheit
Formula
°F = °C × 9/5 + 32
The kelvin is the SI base unit, defined through the Boltzmann constant. A Celsius temperature is the kelvin temperature minus 273.15, and a Fahrenheit degree is 5/9 of a Celsius degree with water freezing at 32 °F. Rankine uses Fahrenheit-sized degrees from absolute zero.
Worked examples
- -40 °C × 1.8 + 32 = -40 °F
- 0 °C × 1.8 + 32 = 32 °F
- 37 °C × 1.8 + 32 = 98.6 °F
- 180 °C × 1.8 + 32 = 356 °F
Things to know about °C to °F
- For a temperature change, multiply by 1.8 and skip the +32: warming by 5 °C is warming by 9 °F.
- 180 °C, a common oven setting, is 356 °F — recipes usually round it to 350 °F.
- −40 °C and −40 °F are the same temperature.
Celsius to Fahrenheit table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| 0 | 32 |
| 1 | 33.8 |
| 2 | 35.6 |
| 5 | 41 |
| 10 | 50 |
| 20 | 68 |
| 37 | 98.6 |
| 50 | 122 |
| 100 | 212 |
| 180 | 356 |
| 1,000 | 1,832 |
The units
- Celsius (°C)
- Celsius: the kelvin temperature minus 273.15. Water freezes at about 0 °C and boils at about 100 °C at sea level.
- Fahrenheit (°F)
- Fahrenheit: degrees 5/9 the size of Celsius degrees, with water freezing at 32 °F and boiling at 212 °F at sea level.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy