Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine; enter any temperature for instant conversion.
Input Data
Value
Source unit.
Target unit.
Results
Converted temperature.
77
The formula used for the conversion.
C→F: °F = °C×9/5+32
At a glance:Celsius as the core: °C→°F = ×9/5+32; °C→K = +273.15; °C→°R = (×9/5+32)+459.67. Invert algebraically for reverse. All conversions go via Celsius then to the target for consistency. Absolute zero is −273.15°C / 0 K.
Formula
°F = °C × 9/5 + 32.
K = °C + 273.15.
°R = °F + 459.67.
How to Use
- Enter a temperature value and pick the source/target units.
- The tool returns the result and the formula.
Case Studies
25°C → °F
25 × 9/5 + 32 = 77°F.
100°C → K
100 + 273.15 = 373.15 K (water boiling point).
FAQ
Why four scales?
Celsius/Kelvin are scientific; Fahrenheit is common in the US; Rankine is the absolute Fahrenheit scale used in engineering.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.