Temperature Converter

Convert temperatures instantly between Celsius, Fahrenheit, Kelvin, and Rankine with absolute-zero validation and exact standard formulas.

Convert instantly

Enter a value and choose the units. Your answer updates as you type.

Value

From

Result

33.8 Fahrenheit (°F)

Quick reference

Celsius (°C)standard scale
Fahrenheit (°F)standard scale
Kelvin (K)standard scale
Rankine (°R)standard scale

About the Temperature Converter

Temperature scales use different zero points and increments, so a simple multiplier is not enough. This converter applies Celsius, Fahrenheit, Kelvin, and Rankine formulas directly. Kelvin and Rankine are absolute scales, and inputs below absolute zero are rejected because they are not physically meaningful in these systems.

Instant conversion helps with weather, cooking, engineering, and thermodynamics. For example, 100°C becomes 212°F; Celsius-to-Fahrenheit calculations use °F = °C × 9/5 + 32, while Kelvin is Celsius + 273.15. Continue with the Pressure Converter for thermodynamic work or the Energy Converter for heat and work units.

Frequently asked questions

What is 0°C in Fahrenheit?

0°C equals 32°F exactly.

Can temperature be below 0 Kelvin?

No. Absolute zero is 0 K, equal to −273.15°C and −459.67°F; the converter rejects lower inputs.

How do Celsius and Kelvin differ?

They have the same size degree, but Kelvin starts at absolute zero: K = °C + 273.15.

Take this calculation further

Browse the converters calculators collection for more tools in this subject.

For a related calculation, use Temperature Interval Converter to convert temperature differences correctly between Celsius, Fahrenheit, Kelvin, and Rankine intervals without applying absolute-temperature offsets. Alternatively, use Fuel Energy per Volume & Heat Density Converter to convert volumetric fuel energy and heat density between J/m³, kJ/L, MJ/L, kWh/m³, and International BTU per cubic foot.

For the underlying method, read A Quick Guide to Temperature Conversion Formulas.