Volts to Millivolts Converter

Enter the voltage in volts:

A Volts to Millivolts (V to mV) converter is a fundamental tool for converting standard voltage measurements into millivolt units. This conversion is essential in electronics, medical instrumentation, and sensor applications where precise voltage measurements are required at smaller scales.

Understanding the Units

• Volt (V):

  • Base SI unit of electrical potential

  • 1V = potential difference producing 1A current through 1Ω resistance

  • Common applications: Household circuits (120V/240V), batteries (1.5V, 9V, 12V)

• Millivolt (mV):

  • 1 mV = 0.001 V (10⁻³ V)

  • Used for measuring:

    • Biomedical signals (ECG, EEG)

    • Sensor outputs (temperature, pressure)

    • Low-voltage electronic circuits

    • Audio signal levels

Conversion Formula

The conversion is straightforward due to the metric prefix system:

$$\text{Millivolts (mV)}=\text{Volts (V)}\times 1,000$$

Derivation:
1 V = 1,000 mV (by definition of the milli- prefix)

Conversion Steps

1. Take the voltage in volts
   Example: 0.25 V

2. Multiply by 1,000

   $$0.25\times 1,000=250$$

3. Result:
   0.25 V = 250 mV

Conversion Table

Volts (V)	Millivolts (mV)
0.001	1
0.01	10
0.1	100
0.5	500
1	1,000
5	5,000
10	10,000

Practical Applications

• Medical Diagnostics: ECG signals (0.1-5 mV), EEG readings (0.001-0.1 mV)

• Industrial Sensors: Thermocouples (mV outputs per °C)

• Audio Equipment: Microphone signal levels (1-10 mV)

• Battery Monitoring: Measuring small voltage drops

• Scientific Research: Low-voltage experimental measurements

Common Measurement Ranges

Application	Typical Range
ECG signals	0.5-5 mV
Thermocouples	1-50 mV
Audio line levels	0.1-1 V
pH meter outputs	0-2000 mV

Calculation Examples

Example 1: Convert 1.2 V to mV

$$1.2\times 1,000=1,200\text{ mV}$$

Example 2: A temperature sensor outputs 0.025 V. Convert to mV

$$0.025\times 1,000=25\text{ mV}$$

Reverse Conversion (mV to V)

$$\text{Volts (V)}=\frac{\text{Millivolts (mV)}}{1,000}$$

Example: 750 mV → 750 ÷ 1,000 = 0.75 V