Celsius to Kelvin Converter

Enter Celsius to convert using K = °C + 273.15.

Celsius

Kelvin

273.15Kelvin

Convert in either direction

Enter a value in the main field for the forward conversion. Reverse conversion, display precision, copy, and a common-value reference table are available here too.

Display precision

Kelvin → Celsius

—Reverse conversion

—Kelvin = Celsius × 1 + 273.15

Celsius	Kelvin

Reverse factor: 1 Kelvin ≈ 1 Celsius. Offset conversions use the inverse affine formula rather than a ratio alone.

Core conversion workflows

Start with a broad dimension converter or jump to the most common metric/imperial pairs. Specialist converters remain available from the full hub.

All 134 converters

Unit ConverterAll-in-one measurement conversion Length ConverterMetric and imperial length units Weight ConverterMass and weight units Temperature ConverterCelsius, Fahrenheit and Kelvin Inches → CMExact 2.54 conversion CM → InchesReverse exact length conversion KG → LBSKilograms to pounds LBS → KGPounds to kilograms °F → °CFahrenheit to Celsius °C → °FCelsius to Fahrenheit Miles → KMMiles to kilometers KM → MilesKilometers to miles

Celsius batch conversion with absolute-zero margin

Convert one or many Celsius values to Kelvin, Fahrenheit and Rankine, reject physically impossible temperatures, and show each value’s margin above absolute zero.

Celsius values (comma/newline separated)

—Valid values

—First Kelvin

—First margin above 0 K

—Invalid below absolute zero

Ready.

°C	K	°F	°R	Above absolute zero

Why this page is more than one result

This converter includes reverse conversion, display precision, formula visibility, copy and a common-value reference table. Use the broader Unit Converter when you need many units at once.

Accuracy boundary

Linear and affine conversions use the declared conversion factor or offset in browser floating-point arithmetic. Display rounding is configurable and should not be mistaken for measurement accuracy.