Degrees Fahrenheit to Degrees Celsius
1 °F ≈ -17.22 °C. Edit either value to convert instantly.
Conversion formula
°C = ((°F × (5 / 9)) + (45,967 / 180) × (1)) − (273.15)1 °F ≈ -17.2222 °C
degree Fahrenheit (°F)
Fahrenheit uses °C = (°F − 32) × 5/9; 32 °F = 0 °C and 212 °F = 100 °C.
Source: NIST SP 811, Appendix B.9: conversion factors by quantity
degree Celsius (°C)
The Celsius scale has the same interval as kelvin, with 0 °C = 273.15 K; water freezes near 0 °C at standard pressure.
Source: BIPM, The International System of Units (SI), 9th edition
Conversion table
Frequently asked questions
How many degrees Celsius are in 1 degree Fahrenheit?
1 °F ≈ -17.22 °C. °C = ((°F × (5 / 9)) + (45,967 / 180) × (1)) − (273.15)
How do I convert °F to °C?
°C = ((°F × (5 / 9)) + (45,967 / 180) × (1)) − (273.15)
Why does this conversion need more than multiplication?
Temperature scales have different zero points. Apply the scale and offset in the formula; below absolute zero is a mathematical result only.
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