Celsius to Fahrenheit
Instant two-way conversion with Kelvin and a live scale.
°C
Type to convert · Enter copies · Ctrl/⌘S swaps
Fahrenheit°F
77.0°F
Celsius
25.0 °C
Fahrenheit
77.0 °F
Kelvin
298.1 K
Formula · worked example
°F = 25 × 9/5 + 32 = 77.0
Celsius to Kelvin
Kelvin is the SI absolute temperature scale. Convert with K = °C + 273.15. The converter above also shows Fahrenheit so you can compare all three at once.
Need Fahrenheit instead? Use the Celsius to Fahrenheit tool.
Frequently asked questions
Quick answers for the searches people make most.
How do you convert Celsius to Kelvin?
Add 273.15 to the Celsius temperature. K = °C + 273.15. Example: 0°C = 273.15 K.
Is Kelvin the same size as a Celsius degree?
Yes. One kelvin equals one Celsius degree in size; only the zero point differs (absolute zero vs. water’s freezing point).
What is absolute zero in Celsius?
Absolute zero is 0 K, which equals −273.15°C (−459.67°F).