Convert Fahrenheit to Celsius — and back — with the exact formula. Loads with °F → °C
preselected: this page is for reading US ovens, thermostats, and forecasts in metric. (The
Celsius to Fahrenheit converter starts the other way,
with fever thresholds and the −40 crossover.)
The formula
°C = (°F − 32) × 5⁄9 · °F = °C × 9⁄5 + 32. The subtraction comes first because 0 °F
and 0 °C are different temperatures — Fahrenheit’s zero sits at −17.8 °C.
US oven ladder
°F
°C (exact)
Metric dial
250
121.1
120 (slow)
325
162.8
160
350
176.7
175–180
375
190.6
190
400
204.4
200
425
218.3
220
450
232.2
230
Recipes, rooms, weather
US recipes are the top reason this direction gets looked up — the ladder above matches
what metric oven dials actually offer, which matters more than the decimal. Thermostats and
aquariums: 72 °F comfort is 22 °C; a tropical tank’s 78 °F is 25.6 °C. Weather: the
subtract-30-and-halve trick from the FAQ is packing-grade; the exact anchors are there when
the difference matters. Science homework in Kelvin lives in the
unit converter’s temperature category.
Private by design
Converted on your device as you type — nothing sent, nothing stored. Traveling? Pair with the
mph to km/h converter for US roads.
Last updated:
Frequently asked questions
What is the Fahrenheit to Celsius formula?
°C = (°F − 32) × 5⁄9, exactly. Subtract 32 first — the scales have different zero points — then scale down. 68 °F → 36 × 5⁄9 = 20 °C. Reverse: °C × 9⁄5 + 32.
What is 350°F in Celsius for baking?
350 °F = 176.7 °C — set a metric oven to 175–180 °C. The US recipe ladder: 325 °F = 163 °C (≈160), 350 °F = 177 °C (≈180), 375 °F = 191 °C (≈190), 400 °F = 204 °C (≈200), 425 °F = 218 °C (≈220). For fan ovens, drop about 20 °C from the converted figure.
What is a comfortable thermostat setting in both scales?
The US default of 72 °F is 22.2 °C; energy-saving guidance of 68 °F is 20 °C. Sleep recommendations of 60–67 °F translate to 15.5–19.4 °C.
How do I judge US weather forecasts in Celsius?
Subtract 30 and halve — 90 °F → 30 °C (true 32.2): fine for packing decisions. The precise anchors: 32 °F = 0 °C (freezing), 50 °F = 10 °C, 70 °F = 21 °C, 90 °F = 32 °C, 100 °F = 37.8 °C — a heat wave in any unit.
Convert length, weight, temperature, volume, area, and speed between 46 units using exact international definitions — instantly, with the formula shown.