volts to millivolts | Exact Decimal + Formula

1 Volt = 1000 Millivolt

Volts to millivolts is a common electronics conversion for sensor signals, battery specs, and circuit design.

About Volt and Millivolt

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).

Millivolt (mV)

A millivolt is one-thousandth of a volt.

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

Electric Voltage Converter

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Precision

Formula

mV = V × 1000

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

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Volt to Millivolt: Quick Reference Table

Volt	Millivolt (Decimal)	Fraction	Real-world equivalent
0.001 V	1 mV	-	standard single unit scale
0.01 V	10 mV	-	multiple unit increments
0.1 V	100 mV	-	multiple unit increments
0.5 V	500 mV	-	multiple unit increments
1 V	1000 mV	-	multiple unit increments
2 V	2000 mV	-	multiple unit increments
5 V	5000 mV	-	multiple unit increments
10 V	10000 mV	-	multiple unit increments
25 V	25000 mV	-	multiple unit increments
50 V	50000 mV	-	multiple unit increments
100 V	100000 mV	-	multiple unit increments
250 V	250000 mV	-	multiple unit increments
500 V	500000 mV	-	multiple unit increments
1000 V	1000000 mV	-	multiple unit increments

V to mV Formula and Examples

Direct Formula mV = V × 1000

Inverse Formula V = mV × 0.001

Mental Math Shortcut

Multiply the value by roughly 1000 to calculate the equivalent amount in your head.

Common Volt to Millivolt Calculations

5 V = 5000 mV
10 V = 10000 mV
50 V = 50000 mV
100 V = 100000 mV
500 V = 500000 mV

Precision & Practical Use

For example, 10 V = 10000 mV — roughly multiple unit increments.

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 Volt to Millivolt

How many millivolts are in one volt?

One Volt (V) equals 1000 Millivolt (mV). To convert volts to millivolts, multiply the volt value by 1000.

How do I convert Volt to Millivolt?

Multiply your volt value by 1000 to get the result in Millivolt: mV = V × 1000. For example, 5 V = 5000 mV.

What is the formula for converting V to mV?

The conversion formula is mV = V × 1000. 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 V to mV?