Weather in India is reported in Celsius (°C), but most home thermometers show body temperature in Fahrenheit (°F). Science uses Kelvin (K). This converter switches between all three and shows the working.
How to use the temperature converter
- Enter the temperature.
- Choose its unit: Celsius, Fahrenheit or Kelvin.
You get the other two units at once.
Formulas
°F = °C × 9 ÷ 5 + 32
°C = (°F − 32) × 5 ÷ 9
K = °C + 273.15Example
37 °C × 9 ÷ 5 + 32 = 98.6 °F, which is normal body temperature. In Kelvin it is 310.15 K.
Body temperature chart
| °F | °C | What it usually means |
|---|---|---|
| 97 – 99 | 36.1 – 37.2 | Normal range |
| 100.4 | 38.0 | Fever begins |
| 101 | 38.3 | Fever |
| 102 | 38.9 | Fever |
| 103 | 39.4 | High fever |
| 104 | 40.0 | Very high fever: see a doctor |
This chart is general information. For a child, an elderly person or anyone with a fever that lasts, rises or comes with other symptoms, consult a doctor.
Weather chart
| °C | °F |
|---|---|
| 0 | 32 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 40 | 104 |
| 45 | 113 |
FAQ
How do I convert Celsius to Fahrenheit in my head?
Double the Celsius figure and add 30 for a rough answer. 25 °C becomes about 80 °F (the exact value is 77 °F).
What is 100 °F in Celsius?
(100 − 32) × 5 ÷ 9 = 37.8 °C, which is a mild fever for many people.
At what temperature are °C and °F the same?
At −40. −40 °C is exactly −40 °F.