Température
About Temperature Conversion
Temperature is a measure of thermal energy and one of the most commonly converted units in daily life. Whether you're checking weather forecasts, cooking recipes, or working in scientific research, understanding temperature scales is essential. Temperature affects everything from chemical reactions and material properties to comfort levels and food safety.
Unlike length or weight conversions that use simple multiplication factors, temperature conversions require formulas because the scales have different zero points and different degree sizes. Celsius and Fahrenheit are most common in everyday use, while Kelvin is the scientific standard because it starts at absolute zero—the point where all molecular motion theoretically stops.
Our temperature converter handles all major scales and provides instant, accurate conversions for any value you need. Whether you're converting body temperature readings, oven settings, or laboratory measurements, we've got you covered with precise calculations.
Temperature Conversion Formulas
| Conversion | Formula | Example |
|---|---|---|
| Celsius to Fahrenheit | °F = (°C × 9/5) + 32 | 25°C = 77°F |
| Fahrenheit to Celsius | °C = (°F − 32) × 5/9 | 77°F = 25°C |
| Celsius to Kelvin | K = °C + 273.15 | 25°C = 298.15 K |
| Kelvin to Celsius | °C = K − 273.15 | 300 K = 26.85°C |
| Fahrenheit to Kelvin | K = (°F + 459.67) × 5/9 | 77°F = 298.15 K |
| Kelvin to Fahrenheit | °F = (K × 9/5) − 459.67 | 300 K = 80.33°F |
| Celsius to Rankine | °R = (°C + 273.15) × 9/5 | 25°C = 536.67°R |
| Fahrenheit to Rankine | °R = °F + 459.67 | 77°F = 536.67°R |
Key Reference Points
| Reference | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute Zero | −273.15°C | −459.67°F | 0 K |
| Water Freezes | 0°C | 32°F | 273.15 K |
| Room Temperature | 20-22°C | 68-72°F | 293-295 K |
| Body Temperature | 37°C | 98.6°F | 310.15 K |
| Water Boils | 100°C | 212°F | 373.15 K |
| Equal Point (C=F) | −40°C | −40°F | 233.15 K |
Temperature Scale Reference
Celsius (°C) – Also called Centigrade, this scale sets water's freezing point at 0° and boiling point at 100° at standard atmospheric pressure. Developed by Anders Celsius in 1742, it's used by most countries for weather, cooking, and everyday measurements. The 100-degree range between freezing and boiling makes it intuitive for most applications.
Fahrenheit (°F) – Developed by Daniel Gabriel Fahrenheit in 1724, originally based on brine (0°F), ice water (32°F), and body temperature (96°F, later revised). Water freezes at 32°F and boils at 212°F. Primarily used in the United States for weather forecasts, cooking, and indoor climate control. The smaller degree size provides more precision without decimals for everyday temperatures.
Kelvin (K) – The SI unit of temperature used in scientific research worldwide. Starts at absolute zero (−273.15°C), the theoretical point where all molecular motion stops. Has the same degree size as Celsius but different zero point. Note: Kelvin uses no degree symbol—it's simply "K" not "°K".
Rankine (°R) – An absolute temperature scale like Kelvin but using Fahrenheit-sized degrees. Primarily used in some thermodynamic engineering applications in the United States, particularly for heat transfer calculations. 0°R equals absolute zero; water freezes at 491.67°R.
Learn More
Explore our in-depth guides on this topic:
Articles Connexes
Temperature in Space: From the Sun to Deep Space
Explore the extreme temperatures found throughout space—from millions of degrees in stellar cores to near absolute zero in the cosmic void.
Lire la suiteThe Kelvin Scale: Absolute Temperature Explained
Understand the Kelvin scale—the scientific standard for temperature that starts at absolute zero, where all molecular motion stops.
Lire la suiteWeather Temperature Conversion Quick Guide
Quickly convert weather temperatures between Celsius and Fahrenheit with this practical guide for travelers and weather watchers.
Lire la suite