millivolts to volts | Exact Decimal + Formula

1 Millivolt = 0.001 Volt

Millivolts to volts is used in electronics and medicine when small signal voltages need expressing in standard units.

About Millivolt and Volt

Millivolt (mV)

A millivolt is one-thousandth of a volt.

Where it's used: Sensor signals, ECG readings, and electronic circuit design.

Volt (V)

The volt is the SI unit of electrical potential difference.

Where it's used: Batteries (1.5 V, 9 V), USB (5 V), and household mains (110/230 V).

Electric Voltage Converter

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Precision

Formula

V = mV × 0.001

To convert Millivolt to Volt, use the formula displayed above.

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Millivolt to Volt: Quick Reference Table

Millivolt	Volt (Decimal)	Fraction	Real-world equivalent
0.001 mV	0.000001 V	-	fractional unit measurement
0.01 mV	0.00001 V	-	fractional unit measurement
0.1 mV	0.0001 V	-	fractional unit measurement
0.5 mV	0.0005 V	-	fractional unit measurement
1 mV	0.001 V	-	fractional unit measurement
2 mV	0.002 V	-	fractional unit measurement
5 mV	0.005 V	-	fractional unit measurement
10 mV	0.01 V	-	fractional unit measurement
25 mV	0.025 V	-	fractional unit measurement
50 mV	0.05 V	-	fractional unit measurement
100 mV	0.1 V	-	fractional unit measurement
250 mV	0.25 V	-	fractional unit measurement
500 mV	0.5 V	-	fractional unit measurement
1000 mV	1 V	-	standard single unit scale

mV to V Formula and Examples

Direct Formula V = mV × 0.001

Inverse Formula mV = V × 1000

Mental Math Shortcut

Divide the value by roughly 1000 to quickly estimate the converted result.

Common Millivolt to Volt Calculations

5 mV = 0.005 V
10 mV = 0.01 V
50 mV = 0.05 V
100 mV = 0.1 V
500 mV = 0.5 V

Precision & Practical Use

For example, 10 mV = 0.01 V — roughly fractional unit measurement.

Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most electric voltage applications, 2–3 significant figures are plenty.

How to Convert Millivolt to Volt

How many volts are in one millivolt?

One Millivolt (mV) equals 0.001 Volt (V). To convert millivolts to volts, multiply the millivolt value by 0.001.

How do I convert Millivolt to Volt?

Multiply your millivolt value by 0.001 to get the result in Volt: V = mV × 0.001. For example, 5 mV = 0.005 V.

What is the formula for converting mV to V?

The conversion formula is V = mV × 0.001. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for mV to V?