Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly with precise calculations and quick reference presets.
Temperature Converter
Quick Conversions
Conversion Formulas
Celsius to Fahrenheit:
°F = (°C × 9/5) + 32
Celsius to Kelvin:
K = °C + 273.15
Fahrenheit to Celsius:
°C = (°F - 32) × 5/9
Temperature Scale Reference
| Event | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute Zero | -273.15°C | -459.67°F | 0 K |
| Water Freezes | 0°C | 32°F | 273.15 K |
| Room Temperature | 20-25°C | 68-77°F | 293-298 K |
| Body Temperature | 37°C | 98.6°F | 310.15 K |
| Water Boils | 100°C | 212°F | 373.15 K |
Features
Bidirectional Conversion
Convert between all three scales instantly
Quick Copy
Copy any result with one click
Precise Calculations
Accurate to 2 decimal places
Quick Presets
Common temperatures for reference
Understanding Temperature Scales
What is Temperature?
Temperature is a measure of the average kinetic energy of particles in a substance. Different scales have been developed throughout history to measure temperature, with Celsius, Fahrenheit, and Kelvin being the most commonly used today.
Understanding how to convert between these scales is essential for cooking, weather interpretation, scientific research, and international communication.
Celsius (°C)
The Celsius scale, also known as centigrade, is part of the metric system and is used worldwide. It was developed by Swedish astronomer Anders Celsius in 1742.
- Water freezes: 0°C
- Water boils: 100°C (at sea level)
- Used in: Most countries worldwide, scientific applications
- Benefits: Easy to understand, decimal-based, metric system
Fahrenheit (°F)
The Fahrenheit scale was proposed by physicist Daniel Gabriel Fahrenheit in 1724. It's primarily used in the United States and some Caribbean countries.
- Water freezes: 32°F
- Water boils: 212°F (at sea level)
- Used in: United States, some Caribbean nations
- Benefits: More precise for everyday temperatures without decimals
Kelvin (K)
The Kelvin scale is the SI base unit of temperature, named after Lord Kelvin. It starts at absolute zero, the theoretical temperature where all molecular motion stops.
- Absolute zero: 0 K (-273.15°C)
- Water freezes: 273.15 K
- Water boils: 373.15 K
- Used in: Scientific research, physics, chemistry
- Benefits: No negative values, direct relationship to energy
Common Temperature Conversions
Everyday Temperatures:
- • Room temperature: 20-25°C (68-77°F)
- • Hot day: 30°C (86°F)
- • Cold day: 0°C (32°F)
- • Comfortable water: 28°C (82°F)
Cooking Temperatures:
- • Low oven: 150°C (300°F)
- • Medium oven: 180°C (350°F)
- • High oven: 220°C (425°F)
- • Bread baking: 200°C (390°F)
Why Convert Temperatures?
- International Travel: Understanding weather forecasts in different countries
- Cooking & Recipes: Converting recipe temperatures between measurement systems
- Science & Education: Working with different temperature scales in research
- Weather Reports: Comparing temperatures from different sources
- Healthcare: Understanding body temperature readings from different thermometers
- Industrial Applications: Manufacturing processes requiring specific temperatures
Quick Conversion Tips
Celsius to Fahrenheit (Mental Math):
Double the Celsius number, subtract 10%, and add 32. For example: 20°C → 40 → 36 → 68°F
Fahrenheit to Celsius (Mental Math):
Subtract 30 and halve the result. For example: 80°F → 50 → 25°C (approximately)
Remember These Key Points:
- 0°C = 32°F (water freezes)
- 100°C = 212°F (water boils)
- -40°C = -40°F (scales intersect)
- Add 273.15 to convert Celsius to Kelvin
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