calqulio.
◎ English · Global

Temperature Converter

Convert Celsius, Fahrenheit and Kelvin. The calculator checks absolute zero and shows the temperature conversion formula.

Enter your values

Enter a numeric value.
Check the selected option before calculating.
Check the selected option before calculating.

Use a decimal point, without thousands separators.

Example result
Temperature
77 °F

The initial result uses the example values. Enter your own values and calculate again.

Edit inputs

How it works

Convert the original temperature to Celsius, then convert Celsius to the target scale. For example, 25 °C equals 77 °F or 298.15 K. Unlike length conversions, temperature scales also use offsets.

Inputs and units
Temperature Converter · Inputs and units
InputExample valueWhat to enter
Temperature25Enter a numeric value.
From scaleCCheck the selected option before calculating.
To scaleFCheck the selected option before calculating.
°F = °C × 9/5 + 32; K = °C + 273.15

Worked example

Show example inputs and results

This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.

Temperature
25
From scale
C
To scale
F

Complete example results

Temperature
77 °F

Reading the result

Check the definitions of the source and target units. A conversion changes the representation of a measurement; it does not measure the quantity again. Round at the final step if you will reuse the result.

Questions and answers

Can I use the example values for my own calculation?

The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.

What is the lowest accepted temperature?

Absolute zero: −273.15 °C, −459.67 °F or 0 K. Temperatures below that limit are rejected. This converts temperatures, not temperature differences.

Why are some results rounded?

Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.

Are my inputs sent to a server?

The calculator processes inputs in your browser. Its code does not send your values to a server.

Conversion reference: NIST SI Guide

Methods & accuracy

What would you like to calculate?

Browse all calculators