About this converter
Length per unit length is a dimensionless strain ratio: change in length divided by original length. One m/m equals 1000 mm/m, 1,000,000 microstrain, 1,000,000 ppm, and 100 percent strain.
This converter supports common strain and deformation scales used in materials testing, structural monitoring, thermal expansion, and strain-gauge data. Civil engineers, materials engineers, mechanical designers, test-lab technicians, and research students use these conversions to compare deformation values without changing the underlying ratio.
How to Use This Converter
- Enter the strain or length-per-length value.
- Select the source unit from the From menu.
- Select the target unit from the To menu.
- Read the converted result and formula line.
- Use Swap to reverse the selected units.
Units Covered
| Unit | Symbol | Common Use |
|---|---|---|
| Meter per meter | m/m | Base dimensionless strain ratio in engineering calculations. |
| Millimeter per meter | mm/m | Structural movement, settlement, and deformation reports. |
| Micrometer per meter | µm/m | Small measured strain values and lab instrumentation. |
| Inch per inch | in/in | US strain data and mechanical test reports. |
| Microinch per inch | µin/in | Strain gauges and small imperial deformation readings. |
| Parts per million | ppm | Thermal expansion and very small dimensionless changes. |
| Percent | % | Larger deformation values and material elongation summaries. |
| Microstrain | µε | Structural health monitoring and strain-gauge output. |
m/m to Microstrain Conversion Table
| From | To |
|---|---|
| 0.000001 m/m | 1 µε |
| 0.00001 m/m | 10 µε |
| 0.0001 m/m | 100 µε |
| 0.0005 m/m | 500 µε |
| 0.001 m/m | 1,000 µε |
| 0.002 m/m | 2,000 µε |
| 0.005 m/m | 5,000 µε |
| 0.01 m/m | 10,000 µε |
| 0.02 m/m | 20,000 µε |
| 0.05 m/m | 50,000 µε |
How to Convert m/m to Microstrain
Meter per meter to microstrain
For example, 0.00125 m/m x 1,000,000 = 1,250 µε.
Microstrain to meter per meter
For example, 850 µε / 1,000,000 = 0.00085 m/m.
When You Need to Convert Length per Unit Length
Strain-gauge systems often report microstrain, while finite-element models may output strain as m/m. A measured 1,500 µε equals 0.0015 m/m or 0.15 percent strain.
Thermal expansion data may be written in ppm, which is numerically equal to microstrain for length ratios. A material expansion of 12 ppm per degree means 12 µε per degree.
Civil and mechanical reports may mix mm/m and percent. A beam deformation ratio of 2 mm/m equals 0.002 m/m, 2,000 µε, or 0.2 percent.