Ohms to Milliohms Converter
Enter the electrical resistance in ohms below to convert it to milliohms.
Convert Ohms to Milliohms
Enter a value in ohms (Ω) to convert to milliohms (mΩ).
Ohm to Milliohm Conversion Table
Table showing various ohm measurements converted to milliohms. Click any preset value or arrow to load it into the converter.
How to Convert Ohms to Milliohms
To convert ohms to milliohms, multiply the electrical resistance by the following conversion ratio: 1,000 milliohms/ohm.
Since one ohm is equal to 1,000 milliohms, you can use this simple formula to convert:
The electrical resistance in milliohms is equal to the electrical resistance in ohms multiplied by 1,000.
For example, here's how to convert 5 ohms to milliohms using the formula above.
How Many Milliohms Are in an Ohm?
There are 1,000 milliohms in an ohm, which is why we use this value in the formula above.
Our ohm to milliohm calculator automatically converts your electrical resistance measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Ohms and milliohms are both units used to measure electrical resistance. Keep reading to learn more about each unit.
What Is an Ohm?
SI unit of electrical resistance (1 V/A). It serves as a primary reference unit for measuring electrical resistance across scientific and practical applications. [1]
The ohm is classified as an International System of Units (SI) unit of electrical resistance. Ohms can be abbreviated as Ω; for example, 1 ohm can be written as 1 Ω.
As the primary coherent reference unit for electrical resistance in this category, all other electrical resistance units are mathematically anchored to the ohm (Ω).
In practice, ohms (Ω) are widely used across standard electrical resistance applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Milliohm?
A milliohm is a unit of electrical resistance equal to 1/1,000 of an ohm (0.001 Ω). One-thousandth of an Ohm. [2]
The milliohm is classified as a metric and SI-compatible unit of electrical resistance. Milliohms can be abbreviated as mΩ; for example, 1 milliohm can be written as 1 mΩ.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliohm (mΩ) a convenient decimal multiple of the ohm (Ω).
In practice, milliohms (mΩ) are widely used across fine-tolerance laboratory, analytical, and micro-scale electrical resistance measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting electrical resistance between ohms (Ω) and milliohms (mΩ), keep full floating-point precision (1 Ω = 1,000 mΩ; 1 mΩ = 0.001 Ω) during intermediate calculations and round only the final milliohm figure to match your instrument tolerance.
More Ohm & Milliohm Conversions
Need to calculate in the opposite direction? Use our milliohms to ohms calculator to switch your starting unit immediately. You can also explore related tools such as converting milliohms to ohms, converting ohms to megohms, or converting ohms to kiloohms.
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Frequently Asked Questions
References
- [1]NIST CUU StandardNIST CUU (Derived SI Unit: Ohm (Ω))·Electrical Resistance Metrology Standard — Ohms (Ω) to Milliohms (mΩ)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Electric Current)·Unit Specifications: Ohm (Ω) & Milliohm (mΩ)
- [3]BIPM ReferenceBIPM (SI Prefixes (mΩ, kΩ, MΩ, GΩ))·Conversion Factors & Mathematical Basis (Ω to mΩ)