Home › Unit Conversion › Temperature Converter
FREE · NO SIGN-UP · TRANSPARENT FORMULAS

Temperature Converter

Move between Fahrenheit, Celsius, and Kelvin.

Your numbers

Make it your own
Updates as you type
Converted temperature
22.2222°C

Calculated from your inputs · rounded for display

Original temperature72°F

Your calculation, step by step

No black boxes
  1. Celsius equivalent = 22.222222 °C.
  2. F = C × 9/5 + 32; K = C + 273.15.
  3. Result = 22.222222 °C.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

C = (F − 32) × 5/9; K = C + 273.15

Temperature conversions need offsets as well as scale factors. A temperature of 10 °C is not the same concept as a temperature difference of 10 °C. This tool converts absolute temperatures and rejects values below absolute zero, −273.15 °C.

A worked example

72 °F = (72 − 32) × 5/9 = 22.22 °C.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

Why is Kelvin written without a degree symbol?

Kelvin is an SI unit written K, not °K.

Can I enter negative temperatures?

Yes, provided the converted value is at or above absolute zero.

Sources & methodology

This calculator uses the mathematical identity and assumptions stated above. No current rates, prices, or external data are loaded. Conversion tools use international unit definitions.

Formula review: October 24, 2026. Read our methodology.