Temperature Converter

Convert temperature between Celsius, Fahrenheit, and Kelvin, with the correct offsets rather than a simple factor. Calculates in your browser.

-

About temperature conversions

Enter a value and choose the units to convert between. Each temperature unit is defined against a single base unit, so any pair lines up consistently, the table shows your value in every temperature unit at once.

Temperature uses offsets, not just a factor: °F = °C × 9/5 + 32, and K = °C + 273.15.

What this does

A temperature converter changes a reading between Celsius, Fahrenheit, and Kelvin, using each scale’s correct offset rather than a single multiplier.

How to use it

  1. Enter a temperature and pick its scale.
  2. Choose the scale to convert to.
  3. Read the converted result instantly.
  4. Swap the scales to reverse the conversion.

How it works

Temperature scales have different zero points, so conversions need an offset, not just a factor. Celsius to Fahrenheit multiplies by 9/5 and adds 32; Kelvin starts at absolute zero, 273.15 below 0 °C.

°F = °C × 9/5 + 32

Example

100 °C is 212 °F, and 0 °C is 32 °F. The two scales cross at −40°, where −40 °C equals −40 °F.

Sources & methodology

Last updated .

Frequently asked questions

How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32. So 100 °C is 212 °F, and 0 °C is 32 °F.

Why is temperature different from other units?

The scales have different zero points, so conversions need an offset, not just a multiplier. −40 °C and −40 °F are the same temperature.

Is my data stored?

No. Everything is calculated locally in your browser.