Example 1
- Value: 37 °C
- Direction: °C → °F
98.60 °F
37 °C is classic body temperature, 98.6 °F on a US thermometer.
Celsius to Fahrenheit
Type a temperature and pick °C to °F or the other way. 37 °C is 98.6 °F. The formula is linear: multiply by 9/5 and add 32, not the “double and add 30” shortcut. 0 °C is 32 °F, not zero Fahrenheit.
Weather and oven scale. Absolute temperature: Kelvin and Celsius.
Result
Enter a temperature value.
How results are calculated
°F = °C x 9/5 + 32. The other way: °C = (°F - 32) x 5/9. 0 °C is 32 °F, the freezing point of water. 100 °C is 212 °F, boiling. 37 °C is 98.6 °F, the classic body temperature. A 20 °C room is 68 °F. -40 °C and -40 °F are the same point.
An EU recipe writes °C; a US recipe writes °F. Enter 180 and keep Celsius selected when that is what the recipe says. 180 °C in the oven is 356 °F.
200 °C is 392 °F. “Double and add 30” is close at room temperature and wrong in the oven: 180 x 2 + 30 = 390, not 356.
Kelvin belongs on the kelvin and Celsius page. This page covers Celsius and Fahrenheit only — weather and oven temperatures. 36.6 °C is 97.88 °F. 98.6 °F from a US thermometer is 37 °C. Converting 212 °F the other way gives 100 °C.
Frost below 0 °C or below 32 °F gives a negative result. That is a valid result, not a typing error. Absolute zero belongs on the kelvin page.
Oven, thermometer, and thermostat share the same formula. Do not mix 180 °C with 180 °F: 180 °F is only 82.22 °C, too cool for bread.
How to use
- Type a thermometer reading, for example 37 or 212.
- Pick °C to °F or °F to °C. That is the field scale, not the header switch.
- Click Calculate. 37 °C gives 98.6 °F. 0 °C gives 32 °F.
- Water boils at 100 °C, which is 212 °F. Below −273.15 °C the calculator does not accept the value.
- For kelvin, use the Kelvin and Celsius page. This page converts only between Celsius and Fahrenheit.
°C and °F on the thermometer
°F = °C × 9/5 + 32. 37 °C is 98.6 °F. 0 °C is 32 °F. −40 is the same point on both scales.
- °C
- The Celsius scale. 0 °C is ice, 37 °C is body temperature, 100 °C is boiling. Input or result.
- °F
- The Fahrenheit scale. 32 °F is ice, 98.6 °F is 37 °C, 212 °F is boiling.
Usage examples
Example 2
- Value: 0 °C
- Direction: °C → °F
32.00 °F
0 °C is water freezing, 32 °F, not zero Fahrenheit.
Example 3
- Value: 180 °C
- Direction: °C → °F
356.00 °F
180 °C in an EU recipe is 356 °F in a US oven.
Example 4
- Value: 100
- Direction: C
212 F
100 °C is boiling water, 212 °F, not 100 °F.
Example 5
- Value: -40
- Direction: C
-40 F
-40 °C and -40 °F are the same point on both scales.
Example 6
- Value: 212
- Direction: F
100 C
212 °F back to Celsius is 100 °C.
Example 7
- Value: 20
- Direction: C
68 F
A 20 °C room is 68 °F, a common US thermostat mark.
Example 8
- Value: 98.6
- Direction: F
37 C
98.6 °F from a US thermometer is 37 °C.
Related calculators
FAQ
How do I convert °C to °F?
Multiply by 9/5 and add 32: °F = °C × 9/5 + 32. The other way you subtract 32 and multiply by 5/9. Same step size, a different zero.
How many °F is 37 °C and 0 °C?
37 × 9/5 + 32 = 98.6 °F, classic body temperature. 0 °C is 32 °F, the ice point, not zero on the Fahrenheit scale.
Are -40 °C and -40 °F the same point?
Yes. That is the only place both scales show the same number. Above and below, the readings split.
Is double and add 30 enough?
Near room temperature it can be close. At 180 °C it gives 390 instead of 356 °F. This page uses the full formula, not that shortcut.
Does an empty field count as 0 °C?
No. An empty field does not start a calculation. Typed 0 on C to F gives 32 °F, the ice point.
How many °F is 180 °C and 200 °C baking?
180 °C is 356 °F. 200 °C is 392 °F. 160 °C is 320 °F. Same formula, another recipe number.
Where is kelvin?
On the kelvin and Celsius page. This page covers weather and oven temperatures; absolute zero belongs on the kelvin page.
Can the result be negative?
Yes. Frost below 0 °C or below 32 °F gives a negative result. −10 °C is 14 °F.
Does a comma in 36.6 work?
Yes. 36.6 and 36,6 are the same temperature. 36.6 °C is 97.88 °F.
How many °C are 68 °F and 212 °F?
68 °F is 20 °C, a usual room. 212 °F is 100 °C, boiling. 98.6 °F is 37 °C.
Knowledge sources
The scale on this page is the SI conversion. NIST SP 330 and BIPM define the kelvin; this is not a calibration certificate.
Page updated in 2026.