Thermal Expansion Converter
The coefficient of thermal expansion describes how much a material grows per degree of temperature rise, as a fraction of its size. The SI unit is per kelvin (1/K), and values are often quoted in parts per million per kelvin. Structural steel expands by roughly 12 ppm/K.
1 1/Kelvin = 1,000,000 ppm/K
How to convert 1/Kelvin to ppm/K
One 1/Kelvin equals 1,000,000 ppm/K, so multiply any value in 1/K by 1,000,000 to get ppm/K. To convert back, divide by 1,000,000 — or multiply by 0.000001.
ppm/K = 1/K × 1,000,000
Example: 25 1/K × 1,000,000 = 25,000,000 ppm/K.
1/Kelvin to ppm/K table
| 1/Kelvin (1/K) | ppm/K (ppm/K) |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 3 | 3,000,000 |
| 4 | 4,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 15 | 15,000,000 |
| 20 | 20,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 75 | 75,000,000 |
| 100 | 100,000,000 |
| 250 | 250,000,000 |
| 500 | 500,000,000 |
| 1,000 | 1,000,000,000 |
ppm/K to 1/Kelvin table
| ppm/K (ppm/K) | 1/Kelvin (1/K) |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 4 | 0.000004 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 15 | 0.000015 |
| 20 | 0.00002 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 75 | 0.000075 |
| 100 | 0.0001 |
| 250 | 0.00025 |
| 500 | 0.0005 |
| 1,000 | 0.001 |
Thermal Expansion units at a glance
All 8 units this converter supports, each expressed in 1/Kelvin (1/K) and the other way round.
| Unit | Symbol | 1 unit in 1/K | 1 1/K in unit |
|---|---|---|---|
| 1/Kelvin | 1/K | 1 | 1 |
| 1/Celsius | 1/deg C | 1 | 1 |
| 1/Fahrenheit | 1/deg F | 1.8 | 0.5555555556 |
| 1/Rankine | 1/deg R | 1.8 | 0.5555555556 |
| ppm/K | ppm/K | 0.000001 | 1,000,000 |
| ppm/C | ppm/C | 0.000001 | 1,000,000 |
| ppm/F | ppm/F | 0.0000018 | 555,555.5556 |
| micron/m/K | um/m/K | 0.000001 | 1,000,000 |
Where thermal expansion conversions are used
Designing expansion joints in bridges and pipelines, precision instruments, and pairing materials that are bonded together.
Frequently asked questions
What is 1 1/Kelvin in ppm/K?
1 1/Kelvin (1/K) is 1,000,000 ppm/K (ppm/K).
What is 1 ppm/K in 1/Kelvin?
1 ppm/K (ppm/K) is 0.000001 1/Kelvin (1/K).
How do I convert 1/Kelvin to ppm/K?
Multiply the value in 1/Kelvin by 1,000,000. For example, 5 1/K × 1,000,000 = 5,000,000 ppm/K. To go the other way, divide by 1,000,000.
How many units does the thermal expansion converter support?
It converts between 8 units: 1/Kelvin, 1/Celsius, 1/Fahrenheit, 1/Rankine, ppm/K, ppm/C, ppm/F, micron/m/K.
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Figures on this page are calculated with the same conversion factors as the converter above and shown to up to 10 significant figures. See our disclaimer before relying on a result in a professional or safety-critical context.