Convert between Celsius, Fahrenheit, and Kelvin. All three fields update live as you type in any one of them.
Type in any field — all three update simultaneously.
| Reference | °C | °F | K |
|---|---|---|---|
| Absolute zero | −273.15 | −459.67 | 0 |
| Water freezes | 0 | 32 | 273.15 |
| Room temperature | 20 | 68 | 293.15 |
| Body temperature | 37 | 98.6 | 310.15 |
| Water boils | 100 | 212 | 373.15 |
| Oven — low | 150 | 302 | 423.15 |
| Oven — moderate | 180 | 356 | 453.15 |
| Oven — hot | 220 | 428 | 493.15 |
| Very hot day (AU) | 42 | 107.6 | 315.15 |
Temperature is one of the most confusing unit differences between countries. Australia uses Celsius for weather, cooking, and science. The United States still uses Fahrenheit for everyday temperature. Scientists worldwide use Kelvin as the absolute temperature scale. This converter handles all three simultaneously — change any one value and the other two update instantly.
International weather: Checking a US weather forecast and seeing 95°F? That is 35°C — a genuinely hot day. Understanding the Fahrenheit scale is useful for anyone travelling to the US, following US media, or communicating with American friends and family.
Cooking from US & UK recipes: American oven temperatures are in Fahrenheit. If a recipe calls for 350°F, that is 177°C — close to the standard "moderate oven" of 180°C used in Australian recipes. The reference table above shows the most common baking temperatures already converted.
Science & education: Kelvin is the SI base unit for thermodynamic temperature and is used in chemistry, physics, and engineering calculations. Absolute zero (0 K) is the point at which molecular motion theoretically stops — equivalent to −273.15°C or −459.67°F.
Fever checking: Normal human body temperature is 37°C (98.6°F). A temperature above 38°C (100.4°F) is generally considered a fever in adults. Checking a US-format thermometer reading in Fahrenheit against these thresholds is a common use for this converter.
°F = (°C × 9/5) + 32. So 20°C = (20 × 1.8) + 32 = 68°F. The reverse is °C = (°F − 32) × 5/9.
Yes — at −40°, both scales read the same value: −40°C = −40°F. This is a well-known curiosity of the two scales.
Convert between Celsius, Fahrenheit, and Kelvin. All three fields update live as you type in any one of them. MyCalcTools calculators are designed for quick everyday estimates with clear inputs, instant results and no account required. Results are provided for general information and planning, not as professional financial, medical, legal or trade advice.