Free Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
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Inputs
Result
Fahrenheit
212.0000 °F
Kelvin
373.1500 K
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Short answer
F = C·9/5 + 32. K = C + 273.15. Absolute zero is 0 K = −273.15 °C = −459.67 °F.
What is the Temperature Converter?
Converts between the three temperature scales used in everyday life and science.
How does the Temperature Converter work?
Convert to Celsius as the pivot. Then compute Fahrenheit and Kelvin from Celsius.
Formula
Variables
CCelsius (metric standard)FFahrenheit (US)KKelvin (SI)
Explanation
Celsius and Fahrenheit have different zero points and step sizes; Kelvin shares Celsius's step size but starts at absolute zero.
Examples
Example 1: 100 °C
Water boils at 100 °C = 212 °F = 373.15 K.
Applications
- Cooking recipes
- Scientific reports
- International travel
Advantages
- All three scales at once
Limitations
- Refuses values below 0 K (unphysical)
Common mistakes
- Using F = C + 32 (missing the 9/5 factor)
Tips
- Quick conversion: double Celsius and add 30 gives an approximate Fahrenheit
Related concepts
The Temperature Converter sits inside the Unit Conversion Tools hub, in the weight, temperature & physics cluster. Mass, thermal and mechanical quantities. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Temperature
Converts between the three temperature scales used in everyday life and science. Within unit conversion tools, temperature belongs to the weight, temperature & physics cluster, where it shares terminology and assumptions with closely related tools.
Learning how temperature is calculated
Celsius and Fahrenheit have different zero points and step sizes; Kelvin shares Celsius's step size but starts at absolute zero. Working through the variables one at a time — C, F, K — makes the result reproducible by hand and easier to sanity-check.
Using temperature to make a decision
Cooking recipes Scientific reports International travel Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How temperature compares with related measures
kilogram, kelvin, pascal, joule all describe adjacent aspects of weight, temperature & physics. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
Why 273.15 for Kelvin?
That is the offset between the Celsius zero (freezing water) and absolute zero (theoretical minimum temperature).
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