Conversion Instrument
Temperature Converter
Convert temperatures quickly between Celsius, Fahrenheit, and Kelvin.
77 °F
Formula: °F = (°C × 9/5) + 32
Standard Thermal Reference Points:
Standard Temperature Conversion Equations
Celsius to Fahrenheit
°F = (°C × 9/5) + 32
Fahrenheit to Celsius
°C = (°F - 32) × 5/9
Celsius to Kelvin
K = °C + 273.15
Kelvin to Celsius
°C = K - 273.15
Water Freezes
0°C = 32°F = 273.15 K
Water Boils
100°C = 212°F = 373.15 K
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Frequently Asked Questions About Temperature Conversion
Scientific definitions of temperature scales and zero-point calibration.
What is the formula to convert Celsius to Fahrenheit?▼
Multiply Celsius by 9/5 (or 1.8) and add 32: °F = (°C × 9/5) + 32. For example, 0°C × 1.8 + 32 = 32°F, and 100°C × 1.8 + 32 = 212°F.
What is the formula to convert Fahrenheit to Celsius?▼
Subtract 32 from Fahrenheit and multiply by 5/9: °C = (°F - 32) × 5/9. For example, (32°F - 32) × 5/9 = 0°C, and (68°F - 32) × 5/9 = 20°C.
What is absolute zero?▼
Absolute zero is the lowest theoretically possible temperature, where all molecular motion reaches minimum thermodynamic energy. It is defined as 0 Kelvin (0 K), which equals -273.15° Celsius and -459.67° Fahrenheit.