Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin instantly — edit any scale, the others follow.
Edit any field — the other two convert instantly. °F = °C × 9/5 + 32 · K = °C + 273.15
Everyday reference points
| Reference | °C | °F | K |
|---|---|---|---|
| Water freezes | 0 | 32 | 273.15 |
| Cold winter day | 5 | 41 | 278.15 |
| Room temperature | 21 | 69.8 | 294.15 |
| Normal body temperature | 37 | 98.6 | 310.15 |
| Hot summer day | 40 | 104 | 313.15 |
| Water boils | 100 | 212 | 373.15 |
About this tool
Converting temperature is one of the most common everyday conversions there is — following a recipe written in the other unit, checking a foreign weather forecast, doing science homework, or setting an appliance. This converter handles all three major scales at once: Celsius, Fahrenheit and Kelvin, with every field linked, so you edit whichever one you have and read the others instantly.
The two conversions people need most are Celsius to Fahrenheit (°F = °C × 9/5 + 32) and Fahrenheit to Celsius (°C = (°F − 32) × 5/9), and both happen live as you type — no button to press. Kelvin, the scientific absolute scale (K = °C + 273.15, where 0 K is absolute zero), is there for physics and chemistry work. The formulas are shown right on the tool so the method is never hidden.
An everyday reference table sits below the converter with the temperatures people actually look up — water's freezing (0°C / 32°F) and boiling (100°C / 212°F) points, normal body temperature (37°C / 98.6°F), comfortable room temperature — so common values are one glance away without any typing. Simple, instant, accurate, and entirely in your browser.
How to use the Temperature Converter
- 1Type a temperature into any of the three fields — Celsius, Fahrenheit or Kelvin.
- 2The other two scales update instantly.
- 3Use the reference table for common temperatures like freezing, boiling and body heat.
- 4The formulas are shown so you can see exactly how the conversion works.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32: °F = °C × 9/5 + 32. So 20°C = 20 × 1.8 + 32 = 68°F. This converter does it instantly — just type the Celsius value and read the Fahrenheit field.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9: °C = (°F − 32) × 5/9. So 98.6°F = (98.6 − 32) × 5/9 = 37°C. Type the Fahrenheit value here and the Celsius equivalent appears automatically.
What is normal body temperature in Celsius and Fahrenheit?
Around 37°C, which is 98.6°F — the classic figure. Normal healthy body temperature actually ranges a little, roughly 36.1–37.2°C (97–99°F), varying by person, time of day and measurement site. The reference table includes it for quick lookup.
What is Kelvin used for?
Kelvin is the scientific absolute temperature scale, used in physics and chemistry. It starts at absolute zero (0 K = −273.15°C), the coldest possible temperature, and uses the same degree size as Celsius — so you convert simply by adding or subtracting 273.15.
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