Square Micrometers to Millidarcies Converter
Enter the permeability in square micrometers below to convert it to millidarcies.
Convert Square Micrometers (µm²) to Millidarcies
Enter a value in square micrometers (µm²) (µm²) to convert to millidarcies (mD).
Square Micrometer to Millidarcy Conversion Table
Table showing various square micrometer measurements converted to millidarcies. Click any preset value or arrow to load it into the converter.
| Square Micrometers (µm²) (µm²) | Millidarcies (mD) |
|---|---|
| 1 µm² | 1,013.2499658 mD |
| 2 µm² | 2,026.4999317 mD |
| 2.5 µm² | 2,533.1249146 mD |
| 5 µm² | 5,066.2498291 mD |
| 10 µm² | 10,132.4996583 mD |
| 15 µm² | 15,198.7494874 mD |
| 20 µm² | 20,264.9993166 mD |
| 25 µm² | 25,331.2491457 mD |
| 30 µm² | 30,397.4989748 mD |
| 50 µm² | 50,662.4982914 mD |
How to Convert Square Micrometers to Millidarcies
To convert square micrometers to millidarcies, multiply the permeability by the following conversion ratio: 1,013.2499658 millidarcies/square micrometer.
Since one square micrometer is equal to 1,013.2499658 millidarcies, you can use this simple formula to convert:
The permeability in millidarcies is equal to the permeability in square micrometers multiplied by 1,013.2499658.
For example, here's how to convert 5 square micrometers to millidarcies using the formula above.
How Many Millidarcies Are in a Square Micrometer?
There are 1,013.2499658 millidarcies in a square micrometer, which is why we use this value in the formula above.
Our square micrometer to millidarcy calculator automatically converts your permeability measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Square Micrometers and millidarcies are both units used to measure permeability. Keep reading to learn more about each unit.
What Is a Square Micrometer?
A square micrometer is a unit of permeability equal to 1/1,000,000,000,000 of a square meter (1e-12 m²). Equal to 10⁻¹² m² (approx. 1.01325 Darcy). [1]
The square micrometer is classified as a metric and SI-compatible unit of permeability. Square Micrometers can be abbreviated as µm²; for example, 1 square micrometer can be written as 1 µm².
When working with square micrometers (µm²) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, square micrometers (µm²) are widely used across fine-tolerance laboratory, analytical, and micro-scale permeability measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Millidarcy?
A millidarcy is a unit of permeability equal to 9.869233e-16 square meters (m²), the base unit for permeability. One-thousandth of a Darcy (9.869×10⁻¹⁶ m²). [2]
The millidarcy is classified as a standard unit of permeability. Millidarcies can be abbreviated as mD; for example, 1 millidarcy can be written as 1 mD.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millidarcy (mD) a convenient decimal multiple of the square meter (m²).
In practice, millidarcies (mD) are widely used across fine-tolerance laboratory, analytical, and micro-scale permeability measurements within international standard workflows, engineering documentation, and technical data sheets.
When converting permeability between square micrometers (µm²) and millidarcies (mD), keep full floating-point precision (1 µm² = 1,013.2499658 mD; 1 mD = 0.000986923 µm²) during intermediate calculations and round only the final millidarcy figure to match your instrument tolerance.
More Square Micrometer & Millidarcy Conversions
Need to calculate in the opposite direction? Use our millidarcies to square micrometers (µm²) calculator to switch your starting unit immediately. You can also explore related tools such as converting millidarcies to square micrometers (µm²), converting square meters (m²) to millidarcies, or converting square meters (m²) to darcies.
Convert from Square Micrometers
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Permeability Metrology Standard — Square Micrometers (µm²) (µm²) to Millidarcies (mD)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Square Micrometer (µm²) & Millidarcy (mD)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (µm² to mD)