Fahrenheit to celsius converter
Convertersconversion pair
Convert fahrenheit to celsius instantly: (°F − 32) × 5/9. The exact inverse of the celsius-to-fahrenheit conversion, with a copy button and no guesswork.
98.6 °F is 37 °C — the human body, non-negotiable in both scales.
work surface
Math, not advice — results are indicative. Read the disclaimer.
pro tips
Quick mental math: subtract 32, halve it, then add a bit. Close enough for weather, close enough for most arguments.
100.4 °F is 38 °C — the fever line, same in every language.
72 °F is 22 °C: the thermostat setting half of America fights over, translated for everyone else.
what it does
The fahrenheit-to-celsius trick runs backwards: subtract 32, then multiply by 5/9. Every American thermostat, recipe and fever chart reads perfectly in celsius once you've done that one move.
You need it whenever fahrenheit shows up somewhere it doesn't belong: a US rental listing boasting 72 °F "year-round", a recipe that wants an oven at 350, a friend reporting a fever of 100.4, or a thermostat in a house you're visiting that refuses to speak celsius. This page is the translator, and it doesn't judge.
For a rough scale: 0 °C is freezing, 10 °C is "not freezing but complaining", 20 °C is pleasant, and 30 °C is a heatwave that gets everyone's opinion. In fahrenheit those are 32, 50, 68 and 86 — the difference is just which number the argument happens in.
Type any fahrenheit number and the widget answers in celsius on the spot, with the math in the hint. Click the result to copy it, and hit swap when the conversation flips to celsius-to-fahrenheit, because it always does.
quick answers
How do I convert fahrenheit to celsius?
Subtract 32 and multiply by 5/9. 68 °F becomes 20 °C, 98.6 °F becomes 37 °C, and the weather finally makes sense.
Is 72 °F room temperature?
It's 22.2 °C — the thermostat setting of legend. Most people set it between 68 and 74 °F (20–23 °C) and then fight about it.
Is 100 °F hot?
It's 37.8 °C — genuinely hot, the kind of day where the pavement has opinions. Also the round number every fahrenheit user quotes first.
Why does the US still use fahrenheit?
History and habit. The scale was adopted early and stayed; celsius users just get to enjoy being right about the math.