Volts to Millivolts Converter
Enter the voltage in volts below to convert it to millivolts.
Convert Volts to Millivolts
Enter a value in volts (V) to convert to millivolts (mV).
Volt to Millivolt Conversion Table
Table showing various volt measurements converted to millivolts. Click any preset value or arrow to load it into the converter.
How to Convert Volts to Millivolts
To convert volts to millivolts, multiply the voltage by the following conversion ratio: 1,000 millivolts/volt.
Since one volt is equal to 1,000 millivolts, you can use this simple formula to convert:
The voltage in millivolts is equal to the voltage in volts multiplied by 1,000.
For example, here's how to convert 10 volts to millivolts using the formula above.
How Many Millivolts Are in a Volt?
There are 1,000 millivolts in a volt, which is why we use this value in the formula above.
Our volt to millivolt calculator automatically converts your voltage measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Volts and millivolts are both units used to measure voltage. Keep reading to learn more about each unit.
What Is a Volt?
SI derived unit of electric potential and electromotive force (1 J/C). It serves as a primary reference unit for measuring voltage across scientific and practical applications. [1]
The volt is classified as an International System of Units (SI) unit of voltage. Volts can be abbreviated as V; for example, 1 volt can be written as 1 V.
As the primary coherent reference unit for voltage in this category, all other voltage units are mathematically anchored to the volt (V).
In practice, volts (V) are widely used across standard voltage applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Millivolt?
A millivolt is a unit of voltage equal to 1/1,000 of a volt (0.001 V). One-thousandth of a Volt (0.001 V). [2]
The millivolt is classified as a metric and SI-compatible unit of voltage. Millivolts can be abbreviated as mV; for example, 1 millivolt can be written as 1 mV.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millivolt (mV) a convenient decimal multiple of the volt (V).
In practice, millivolts (mV) are widely used across fine-tolerance laboratory, analytical, and micro-scale voltage measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting voltage between volts (V) and millivolts (mV), keep full floating-point precision (1 V = 1,000 mV; 1 mV = 0.001 V) during intermediate calculations and round only the final millivolt figure to match your instrument tolerance.
More Volt & Millivolt Conversions
Need to calculate in the opposite direction? Use our millivolts to volts converter (mV to V) to switch your starting unit immediately. You can also explore related tools such as converting volts to microvolts, converting volts to kilovolts, or converting microvolts to volts.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Electric Potential Metrology Standard — Volts (V) to Millivolts (mV)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Volt (V) & Millivolt (mV)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (V to mV)