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Voltage Unit Converter

result equals value times from-factor divided by to-factor

Voltage Conversion =

1 Volt (V) = 1000 Millivolt (mV); 0.001 Kilovolt (kV)

Solution in Other Units

UnitValue
Volt (V)1
Millivolt (mV)1000
Kilovolt (kV)0.001
Megavolt (MV)1e-6
Microvolt (µV)1000000

Show Your Work

Result = Value × (Source factor ÷ Target factor)
Base unit for this voltage family is Volt (V).
1 Volt (V) = 1 Volt (V)
1 Volt (V) = 1000 Millivolt (mV)
1 Volt (V) = 0.001 Kilovolt (kV)
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How It Works

This converter uses the volt (V) as its base unit. Each supported voltage unit has a known factor relative to the volt, so the calculator converts your source value into volts first and then divides by each target-unit factor to populate the full voltage table.

Example Problem

Convert 3.3 volts to millivolts and microvolts for an electronics worksheet.

  1. Start with the source value: 3.3 V.
  2. Convert volts to millivolts by multiplying by 1,000.
  3. 3.3 × 1,000 = 3,300 mV.
  4. Convert volts to microvolts by multiplying by 1,000,000.
  5. 3.3 × 1,000,000 = 3,300,000 µV.
  6. So 3.3 V is 3,300 mV and 3,300,000 µV.

Key Concepts

Voltage, or electric potential difference, measures the energy available per unit charge between two points. The SI base unit is the volt, but small-signal work often uses millivolts and microvolts, while utility and high-energy systems use kilovolts and megavolts. Most voltage conversions are simple power-of-ten shifts through the volt.

Applications

  • Electronics design: comparing sensor, ADC, and analog signal levels in µV, mV, and V
  • Power engineering: expressing system and line voltages in kV or MV
  • Instrumentation: translating logged signals into the unit scale that best matches the device range
  • Biomedical and lab systems: reading very small potentials without unit-prefix confusion

Common Mistakes

  • Mixing up millivolts and microvolts, which differ by a factor of 1,000
  • Confusing voltage with current even though they are related but distinct electrical quantities
  • Dropping metric prefixes when converting power-system values, which can create large magnitude errors

Frequently Asked Questions

How do you convert voltage units?

Convert the source value to volts first, then divide by the target-unit factor. That is the base-unit method this calculator uses.

What is the formula for converting volts, millivolts, and kilovolts?

Use Result = Value × (source factor ÷ target factor), where each factor is defined relative to the volt.

How many millivolts are in 1 volt?

One volt equals 1,000 millivolts.

How many volts are in 1 kilovolt?

One kilovolt equals 1,000 volts.

What is a microvolt?

A microvolt is one millionth of a volt.

Why do engineers switch between µV, mV, V, and kV?

The different prefixes make very small and very large voltages easier to read without long strings of zeros.

Can I use this for sensors, electronics, and power systems?

Yes. Any true voltage value can be converted across the supported units here.

Voltage Conversion Formula

Voltage conversions use the volt as the common base unit. The calculator converts your source potential difference into volts first, then reports the same electrical value in every other supported unit below.

Result = Value × (Source factor ÷ Target factor)
  • Result — the converted measurement in the target voltage unit
  • Value — the original measurement you enter
  • Source factor — the factor that maps the source unit to the common base unit
  • Target factor — the factor used to express the same base-unit value in the target unit

Worked Examples

Sensors

How do you convert 240 millivolts to volts?

A sensor output is in millivolts, but your controller input range is listed in volts.

  • Start with the source value: 240 mV.
  • Use the relationship 1 V = 1,000 mV.
  • Divide: 240 ÷ 1,000 = 0.24 V.
  • That is also 240,000 microvolts.
  • So the signal is 0.24 volts.
  • The same voltage is 0.24 V.

A signal of 240 mV equals 0.24 V.

This is a common electronics and instrumentation conversion for low-level signals.

Power Systems

What is 13.8 kilovolts in volts?

A distribution system is rated in kilovolts, but a downstream calculation needs volts.

  • Start with the source value: 13.8 kV.
  • Use the relationship 1 kV = 1,000 V.
  • Multiply: 13.8 × 1,000 = 13,800 V.
  • You can also express that as 13,800,000 mV.
  • So the line voltage is 13,800 volts.
  • The same voltage is 13,800 V.

A system voltage of 13.8 kV is 13,800 V.

This is typical for medium-voltage distribution discussions and equipment specs.

Biomedical Signals

How do you convert 500 microvolts to millivolts?

A biopotential or instrumentation signal is reported in microvolts, but you want the result in millivolts.

  • Start with the source value: 500 µV.
  • Use the relationship 1 mV = 1,000 µV.
  • Divide: 500 ÷ 1,000 = 0.5 mV.
  • That is also 0.0005 V.
  • So the signal is half a millivolt.
  • The same voltage is 0.5 mV.

A signal of 500 µV equals 0.5 mV.

Small voltage-unit conversions are common in sensors, medical instrumentation, and analog design.

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