Temperature Conversion Calculator
Convert between Celsius, Fahrenheit, Kelvin, and other temperature scales
Temperature Unit Converter
Celsius
Fahrenheit
Temperature Context
Water freezing point
All Temperature Conversions
Water freezes at 0°C, boils at 100°C
Water freezes at 32°F, boils at 212°F
Absolute zero at 0K (-273.15°C)
Absolute temperature scale in Fahrenheit degrees
Inverted scale, higher values = lower temperatures
Scale where water freezes at 0°N and boils at 33°N
Scale where water freezes at 0°Ré and boils at 80°Ré
Scale where water freezes at 7.5°Rø and boils at 60°Rø
Common Temperature Examples
Water Freezing Point
0°C = 32°F = 273.15K
Room Temperature
20°C = 68°F = 293.15K
Human Body Temperature
37°C = 98.6°F = 310.15K
Water Boiling Point
100°C = 212°F = 373.15K
Key Conversion Formulas
°F = (°C × 9/5) + 32
°C = (°F - 32) × 5/9
K = °C + 273.15
°C = K - 273.15
K = (°F - 32) × 5/9 + 273.15
°F = (K - 273.15) × 9/5 + 32
Temperature Scale Categories
Common Scales
Celsius, Fahrenheit, Kelvin
Everyday use & science
Absolute Scales
Kelvin, Rankine
Start from absolute zero
Historical Scales
Delisle, Newton, Réaumur, Rømer
Scientific history
Common Applications
Weather forecasting and climate data
Medical and health applications
Scientific research and experiments
Industrial processes and manufacturing
Cooking and food safety
Understanding Temperature and Temperature Scales
What is Temperature?
Temperature is a measure of the average kinetic energy of particles in a substance. It indicates how hot or cold something is and determines the direction of heat flow. Higher temperatures mean particles are moving faster.
Why Different Temperature Scales?
- •Historical Development: Different scientists created scales based on available reference points
- •Regional Preferences: Different countries adopted different scales
- •Scientific Needs: Absolute scales needed for scientific calculations
- •Practical Applications: Different scales work better for different uses
Major Temperature Scales
Celsius (°C)
Based on water's freezing (0°C) and boiling (100°C) points. Used worldwide for weather, cooking, and general purposes.
Fahrenheit (°F)
Used primarily in the United States. Water freezes at 32°F and boils at 212°F. More precise for human comfort range.
Kelvin (K)
Absolute temperature scale starting from absolute zero. Used in science and engineering. Same scale size as Celsius.
Temperature Conversion Tips
Mental Conversions
- • C to F: Double and add 30 (rough estimate)
- • F to C: Subtract 30 and halve (rough estimate)
- • C to K: Add 273 (precise: add 273.15)
Memory Aids
- • Water freezes: 0°C = 32°F
- • Body temperature: 37°C = 98.6°F
- • Water boils: 100°C = 212°F