Convert coefficient of thermal expansion between 1/K, 1/°C, 1/°F and ppm.
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Thermal Expansion Converter
Heat • 6 units
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Enter a value to convert
Result
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Conversion Factor
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In 1/K
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Visual Comparison
All Units
How to Use the Thermal Expansion Converter
Enter a value — type any number. Invalid text and symbols are blocked automatically.
Select From and To units — choose the units to convert between.
Read the animated result — the converted value, factor, and full reference table update instantly.
Use Swap (⇄) — reverse the conversion in one click.
Why Use This Thermal Expansion Converter
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Accurate Standards
Built on internationally recognised SI and standards-body conversion factors for dependable results.
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Instant & Animated
Results update live as you type, with a clear visual breakdown across every unit at once.
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100% Private
Everything runs in your browser — no account, no uploads, nothing leaves your device.
Common Thermal Expansion Converter Values
Quick reference — 1 per Kelvin (1/K) is equal to:
per Degree Celsius
1/°C
1
per Degree Fahrenheit
1/°F
0.555555556
ppm per Kelvin
ppm/K
1,000,000
ppm per °C
ppm/°C
1,000,000
µm/(m·K)
µm/(m·K)
1,000,000
Thermal Expansion Converter FAQ
It expresses how much a material expands per degree of temperature change. Aluminium is about 23 ppm/K; steel about 12 ppm/K; glass about 9 ppm/K.
A Fahrenheit degree is smaller than a kelvin (1 °F = 5/9 K), so the same expansion measured per °F gives a number 1.8× larger when expressed per kelvin.