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Voltage converter

V, mV, µV, kV.

1 millivolt = 0.001 volts

How it’s calculated

V = mV × 0.001

  • Multiply the value in millivolts by 0.001.
  • To go back, divide by 0.001 (or multiply by 1000).
  • 1 mV = 0.001 V · 1 V = 1,000 mV
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 V = 1000 mV. Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units); BIPM SI Brochure (9th ed.).

  2. Multiply by the factor written as a fraction

    Put mV in the denominator so it cancels, leaving V.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 0.001 V

1 mV in other units

Batch convert mV → V
Results
  1. 1 mV = 0.001 V
  2. 5 mV = 0.005 V
  3. 10 mV = 0.01 V
  4. 25 mV = 0.025 V

Permanent link to this conversion

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Common voltage conversions

Voltage units and exact definitions

UnitSystemDefinition
Volt (V)SI (metric)Base unit
Millivolt (mV)SI (metric)1 mV = 0.001 V
Microvolt (µV)SI (metric)1 µV = 0.000001 V
Kilovolt (kV)SI (metric)1 kV = 1000 V
Megavolt (MV)SI (metric)1 MV = 1000000 V

Millivolts to volts conversion table

millivolt (mV) to volt (V)
Millivolts (mV)Volts (V)
0.1 mV0.0001 V
0.5 mV0.0005 V
1 mV0.001 V
2 mV0.002 V
3 mV0.003 V
4 mV0.004 V
5 mV0.005 V
6 mV0.006 V
7 mV0.007 V
8 mV0.008 V
9 mV0.009 V
10 mV0.01 V
15 mV0.015 V
20 mV0.02 V
25 mV0.025 V
30 mV0.03 V
40 mV0.04 V
50 mV0.05 V
75 mV0.075 V
100 mV0.1 V
250 mV0.25 V
500 mV0.5 V
1,000 mV1 V

Frequently asked questions

Which voltage units can I convert?

volts (V), millivolts (mV), microvolts (µV), kilovolts (kV), megavolts (MV).

How accurate are the results?

Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.