Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine with our free online temperature converter. Whether you're cooking, traveling internationally, working in science, or just curious about weather forecasts, our calculator provides accurate conversions across all four major temperature scales. Our temperature converter handles all common temperature scales used worldwide. Enter a value, select the input scale, and see precise results in Celsius, Fahrenheit, Kelvin, and Rankine. Perfect for students, scientists, cooks, travelers, and anyone needing quick temperature conversions.
Enter your details and click Calculate to see results.
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Type the temperature value you want to convert.
Choose whether your input is Celsius, Fahrenheit, or Kelvin.
See the temperature in all four scales instantly.
All conversions first convert the input to Celsius as a base unit, then derive the other scales. Celsius to Fahrenheit uses F = C x 9/5 + 32. Celsius to Kelvin uses K = C + 273.15. Rankine is derived from Fahrenheit using R = F + 459.67.
Accuracy: Results calculated to 4 decimal places for scientific precision. All four major temperature scales supported: Celsius, Fahrenheit, Kelvin, and Rankine. Handles negative values and extreme temperatures correctly.
Celsius is used worldwide for everyday temperature measurement. Fahrenheit is common in the United States. Kelvin is the SI base unit used in science, where 0 K is absolute zero. Rankine is the Fahrenheit-based absolute scale, used in some engineering applications.
Water boils at 100 degrees Celsius, which equals 212 degrees Fahrenheit, 373.15 Kelvin, and 671.67 degrees Rankine. Enter 100 in Celsius to verify these conversions.
Normal human body temperature is about 37 degrees Celsius or 98.6 degrees Fahrenheit. Enter 37 in Celsius to see the equivalent in all four scales.
The converter first translates your input value to Celsius as a base unit, then applies standard conversion formulas to compute the equivalent in Fahrenheit, Kelvin, and Rankine. For example, Celsius to Fahrenheit uses F = C x 9/5 + 32, and Celsius to Kelvin uses K = C + 273.15.
