Temperature Converter: A Practical Guide
Use Temperature Converter to convert Celsius, Fahrenheit and Kelvin values. Temperature scales use both scale factors and offsets, so the formula differs from a simple length conversion. Distinguish an actual temperature from a temperature difference.
How to Use Temperature Converter
- Enter Value in the source unit.
- Choose From and To carefully.
- Select Convert.
- Read the result with its unit and round only as appropriate for the task.
Offsets and Absolute Zero
Fahrenheit = Celsius × 9/5 + 32. Kelvin = Celsius + 273.15. The inverse formulas remove the corresponding offset before scaling.
A temperature rise of 10 Celsius degrees is a rise of 18 Fahrenheit degrees, not 50. This form converts absolute readings. Values below absolute zero are physically invalid even if a particular input path accepts them; independently check such inputs.
Worked Example
0 °C corresponds to 32 °F and 273.15 K. 100 °C corresponds to 212 °F and 373.15 K.
A reading of -40 has the same numeric value in Celsius and Fahrenheit, providing a useful arithmetic check.
Convert another environmental quantity: use the Pressure Converter.
Average comparable readings in one scale: use the Average Calculator.
Checks and Common Mistakes
- Do not use an absolute-reading formula for a difference.
- Kelvin is written K, without a degree sign.
- Check physically impossible values.
- Do not infer a medical interpretation solely from a unit conversion.
Frequently Asked Questions
Can I convert a temperature change?
Use the scale factor without the offset: a change of 1 °C equals a change of 1 K or 1.8 °F.
Why does zero Celsius not equal zero Kelvin?
The scales use different zero points.
Does conversion account for sensor error?
No. It converts the supplied reading without calibrating the measurement.
Related Tools for the Next Step
- Pressure Converter: Convert another environmental quantity.
- Average Calculator: Average comparable readings in one scale.
- Percentage Change Calculator: Use relative change only where its meaning is appropriate.
- Time Converter: Convert measurement durations.
Reference
Further reading: NIST SI units resources.