Why Use This Tool?
Temperature is the conversion that breaks the 'just multiply by a factor' rule — the scales have different zero points, so the formula is multiply then shift. This converter applies the exact formulas and shows all three scales from one entry.
Enter negative values freely: −40 is the famous point where Celsius and Fahrenheit agree, and 0 K is absolute zero, the coldest anything can be.
How It Works
- Enter the temperature value.
- Pick which scale you're starting from.
- Read the other two scales — all three shown every time.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32: 100 °C becomes 212 °F. The converter applies the exact formula and also shows Kelvin.
What is absolute zero in Celsius and Fahrenheit?
0 K equals −273.15 °C and −459.67 °F — the theoretical minimum where molecular motion stops. Enter 0 with Kelvin selected to verify.
Why doesn't temperature convert by a simple factor?
Because the zero points differ: 0 °C is water's freezing point, but 0 °F is an arbitrary brine mixture. The shift requires the additive step.
Tips & Things to Watch
- −40 is the crossover point where Celsius and Fahrenheit are equal.
- Kelvin has no degrees symbol and never goes negative — absolute zero is the floor.
- Oven temperatures: 180 °C ≈ 350 °F is the most-converted number in cooking.