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Sources and Accuracy
Temperature conversions are formula based, not factor based. Celsius, Fahrenheit, Kelvin, and Rankine are converted through the correct scale equations.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
degree Celsius [°C]
Definition
The degree Celsius is a temperature scale where water freezes at 0 and boils near 100 at standard pressure.
History
The Celsius scale developed from the centigrade scale and is now linked to the kelvin temperature scale.
Current use
Celsius is used for weather, cooking, science, health, HVAC, and everyday temperature measurement in most countries.
degree Fahrenheit [°F]
Definition
The degree Fahrenheit is a temperature scale commonly used in the United States for weather and household temperatures.
History
The Fahrenheit scale was developed in the early 18th century and remains part of US customary measurement.
Current use
Fahrenheit is used for weather forecasts, ovens, thermostats, body temperature, and consumer appliances in the United States.
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How to Convert
Enter the value in the “From value” field.
Confirm the source unit is degree Celsius [°C].
Confirm the target unit is degree Fahrenheit [°F].