Temperature converter
Convert between Celsius, Fahrenheit and Kelvin with offset formulas and an absolute-zero check. Example: 350 F is 176.666667 C; 0 C is 273.15 K.
What to know
The temperature page is different from every other unit category because it cannot use a single multiplier. It converts through Celsius with offsets: C = (F - 32) x 5/9, C = K - 273.15, F = C x 9/5 + 32 and K = C + 273.15.
Worked examples: an oven at 350 F is (350 - 32) x 5/9 = 176.666667 C, 25 C is 77 F, and 0 C is 273.15 K. The Celsius and Fahrenheit scales meet at -40, where the page returns -40 in both directions.
Negative inputs are allowed, but values below absolute zero are blocked with an error: -273.15 C, -459.67 F or 0 K. This catches typing slips like -300 C before they produce a meaningless output.
Only these three scales are offered. Rankine and Reaumur are absent. The default pair is C to F, which is the combination most people need when reading a forecast or a recipe from another country.
Cooking, weather and body temperature cover most uses. A 180 C oven is 356 F, 20 C is a comfortable 68 F, and 37 C is 98.6 F. Each of these results is exact, because the formulas have no rounding step until the sixth decimal.
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How to use Temperature converter
- Type 350 in the Value field.
- Select °F in From and °C in To.
- Read the Result line, which shows 176.666667 °C.
- Choose K in To to see the same temperature as 449.816667 K.
Quick answers
What is 98.6 F in Celsius?
37 C, since (98.6 - 32) x 5/9 = 37.
Why does -300 C produce an error?
It lies below absolute zero (-273.15 C), the lowest temperature that physics allows, so the page rejects it.
Where do Celsius and Fahrenheit give the same number?
At -40. Enter -40 in either scale and the other shows -40.