Numbers
Temperature Converter
Used by developers, writers, and creators worldwide.
A temperature converter takes one reading and shows it in all three common scales at once — Celsius, Fahrenheit, and Kelvin. Enter a value, choose the scale it is currently in, and the tool converts it instantly so you do not have to remember the formulas. Celsius and Fahrenheit are the everyday scales used around the world, while Kelvin is the absolute scale used in science, starting from absolute zero. Students reach for it in chemistry and physics, cooks convert oven temperatures between recipes written in different countries, and travellers make sense of a foreign weather forecast. Because all three results appear together, you can sanity-check a conversion at a glance — for instance confirming that water boils at 100 °C, 212 °F, and 373.15 K. Everything is calculated locally in your browser, rounded to two decimal places, with no setup and nothing to install.
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How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Enter the temperature value.
- Select the scale the value is currently in.
- Click Generate to convert it to all three scales.
- Copy the result you need for your recipe, forecast, or calculation.
Use Cases
- •Converting an oven temperature between recipes from different countries
- •Checking Celsius and Fahrenheit for a foreign weather forecast
- •Converting to Kelvin for a chemistry or physics calculation
- •Teaching how the three temperature scales relate to each other
- •Quickly sanity-checking a temperature reading in any scale
Tips
- →Use water's known points — 0 °C, 32 °F — to sanity-check a conversion.
- →Pick Kelvin as the source when working from a science problem.
- →Negative Celsius values convert correctly, so polar forecasts work too.
- →All three scales show at once, making cross-checks instant.
FAQ
how do i convert celsius to fahrenheit
Multiply the Celsius value by nine fifths and add 32. For example, 100 °C × 9/5 = 180, plus 32 gives 212 °F. The tool does this automatically and also shows the Kelvin equivalent so you can see all three at once.
what is kelvin and why use it
Kelvin is the absolute temperature scale used in science, starting at absolute zero (−273.15 °C), the coldest possible temperature. A change of one kelvin equals a change of one degree Celsius, so you convert by simply adding or subtracting 273.15.
why are the results rounded
Results are rounded to two decimal places to stay readable for everyday use. The underlying conversion is exact, so if you need more precision you can apply the formulas directly, but two decimals is ample for cooking, weather, and most coursework.