MATERIAL HEAT PROPERTY WORKSPACE

Thermal Conductivity Converter

Convert thermal conductivity among SI watt, BTU IT, thermochemical calorie, and kilocalorie compound-unit conventions.

Reviewed reference factorsValues stay in this browser tabProperty conversion only; layer thickness, area, temperature field, contact resistance, and heat transfer are not calculated.

Conversion input

Convert a stated thermal conductivity

Enter conductivity from a datasheet or measurement and match every energy, length, time, and temperature-difference convention in its compound unit.

Find a unit6 / 6

Filter by unit name, symbol, or code. Your current selections remain available.

Known value0 / 80

Enter a non-negative property value and retain material state, direction, temperature, and test method.

Convert from

Choose the unit attached to the value you entered.

Convert to

Choose the unit required for your report, estimate, or comparison.

Displayed precision

Choose the maximum decimal places shown. This does not increase source accuracy.

Conversion runs locally after the active reference catalogue loads.

Conversion result

Your checked conversion appears here

Load the reviewed example or enter a value to compare every available thermal conductivity unit.

What this tool delivers

Thermal Conductivity conversion contract

This page rescales a material property and does not substitute conductivity for thermal resistance, conductance, or U-value.

What it converts

Converts six labelled thermal-conductivity conventions through watts per metre kelvin.

What you provide

A property value, complete source convention, destination unit, material conditions, and suitable precision.

What you receive

A selected equivalent, SI conversion equation, comparison table, and CSV record.

Calculation method

How compound conductivity units reduce to W per metre kelvin

Each factor reconciles energy rate, path length, and temperature difference to W/(m K). Kelvin and degree Celsius intervals have equal size, while BTU and calorie entries retain their named IT or thermochemical energy convention before destination conversion.

Review the NIST thermal-conductivity factors

Quick answers

Thermal Conductivity Converter questions

Is thermal conductivity the same as thermal resistance?

No. Conductivity is a material property, commonly expressed in W/(m K). Thermal resistance also depends on geometry, such as layer thickness and area, and may include interfaces or surface films. Converting conductivity does not produce an R-value or U-value without those additional definitions and conditions.

Why are the BTU and calorie conventions labelled?

Several historical energy-unit definitions exist, and small factor differences can matter in technical work. This converter labels the International Table BTU and thermochemical calorie rather than presenting an ambiguous BTU or calorie. Match the source specification and do not remove the convention when recording or exchanging the converted result.

Can I compare conductivity values from different temperatures?

Only when the material behavior and test basis support that comparison. Conductivity can vary with temperature, moisture, density, direction, composition, and manufacturing state. This page does not adjust any of those factors. Preserve the test conditions and use an appropriate material model or qualified source for interpolation.