100 °C at a glance
- Fahrenheit
- 212 °F
- Kelvin
- 373.15 K
- Rankine
- 671.67 °R
- Rounded
- 212 °F
- Quick estimate
- 230 °F
- As a change (Δ)
- Δ100 °C = Δ180 °F
How to convert 100 °C to Fahrenheit
100 × 1.8 = 180
180 + 32 = 212 °F
Multiply by 9/5 (1.8) because each Celsius degree spans 1.8 Fahrenheit degrees, then add 32 because water freezes at 32 °F rather than 0. Since 100 is a multiple of 5, the result is a whole number.
Estimate it in your head
Double it and add 30: 100 × 2 + 30 = 230 °F, which is 18 degrees high — good for weather, not for cooking or medicine.
Careful with temperature changes: a rise of 100 °C is a rise of 180 °F — multiply by 1.8 but do not add 32.
100 °C: the boiling point
At standard sea-level pressure (101.325 kPa), pure water boils at 100 °C, or 212 °F — the upper fixed point of the everyday Celsius scale. (Under today’s kelvin-based definition the measured value is about 99.97 °C, a difference no kitchen thermometer can show.) Higher up it boils sooner: about 95 °C in Denver and roughly 70 °C on the summit of Everest.
Boiling water is hot enough to sterilize kitchen tools and cook pasta, but not to brown food; browning (the Maillard reaction) needs the much higher surface temperatures of frying, roasting or grilling.
Temperatures near 100 °C
| Celsius | Fahrenheit | Kelvin |
|---|---|---|
| 95 °C | 203 °F | 368.15 K |
| 96 °C | 204.8 °F | 369.15 K |
| 97 °C | 206.6 °F | 370.15 K |
| 98 °C | 208.4 °F | 371.15 K |
| 99 °C | 210.2 °F | 372.15 K |
| 100 °C | 212 °F | 373.15 K |
Frequently asked questions
What is 100 °C in Fahrenheit?
100 °C is 212 °F: multiply by 1.8 (180) and add 32.
Is 100 °C hot or cold?
100 °C is the boiling point of water at sea level, 212 °F.
How do you convert 100 °C to Fahrenheit quickly?
Double it and add 30: 230 °F. The exact value is 212 °F.
What is 100 °C in Kelvin?
Add 273.15: 100 °C = 373.15 K.