Temperature Converter
Enter any temperature and instantly see all conversions
Celsius
°C
Fahrenheit
°F
Kelvin
K
Conversion Formulas
C → F
F = (C × 9/5) + 32
F → C
C = (F − 32) × 5/9
C → K
K = C + 273.15
K → C
C = K − 273.15
F → K
K = (F − 32) × 5/9 + 273.15
K → F
F = (K − 273.15) × 9/5 + 32
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit? +
To convert Celsius to Fahrenheit, multiply the Celsius value by 9/5 (or 1.8) and then add 32. The formula is: F = (C x 9/5) + 32. For example, 100 degrees C = (100 x 1.8) + 32 = 212 degrees F.
What is the formula to convert Fahrenheit to Celsius? +
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit value and then multiply by 5/9. The formula is: C = (F - 32) x 5/9. For example, 72 degrees F = (72 - 32) x 5/9 = 22.22 degrees C.
What is absolute zero? +
Absolute zero is the lowest theoretically possible temperature where all molecular motion stops. It equals 0 Kelvin, -273.15 degrees C, or -459.67 degrees F. No physical system can reach absolute zero, though scientists have gotten very close.
When should I use Kelvin? +
Kelvin is the SI unit for temperature and is primarily used in scientific contexts. It starts at absolute zero (no negative values) which makes it useful for physics calculations, gas laws, and thermodynamics. In everyday life, Celsius or Fahrenheit is more practical.
At what temperature are Celsius and Fahrenheit equal? +
Celsius and Fahrenheit are equal at -40 degrees. That is, -40 degrees C = -40 degrees F. This is the only point where both scales intersect.