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Millivolt to Volt Converter

Enter the value that you want to convert millivolt (mV) to volt (V) or volt to millivolt.Also written as MV to V conversion.

1 millivolt = 0.0010000 volt

Formula: volt = millivolt value × 0.0010000

MV to V — millivolt to volt

mV
0.01000V

10 millivolt = 0.01000 volt

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Millivolt to Volt: The Essentials

What is Millivolt?

Millivolt (mV) is a unit of electric potential measurement. 1 millivolt is equal to 0.0010000 volt.

Understanding the Volt

Volt (V) is a unit of electric potential measurement. 1 volt is equal to 1000.0000000 millivolt.

millivolt to volt metric conversion table

0.01 mV=0.00001 V
0.1 mV=0.00010 V
1 mV=0.00100 V
2 mV=0.00200 V
3 mV=0.00300 V
4 mV=0.00400 V
5 mV=0.00500 V
6 mV=0.00600 V
7 mV=0.00700 V
8 mV=0.00800 V
9 mV=0.00900 V
10 mV=0.01000 V
11 mV=0.01100 V
12 mV=0.01200 V
13 mV=0.01300 V
14 mV=0.01400 V
15 mV=0.01500 V
16 mV=0.01600 V
17 mV=0.01700 V
18 mV=0.01800 V
19 mV=0.01900 V
20 mV=0.02000 V
30 mV=0.03000 V
40 mV=0.04000 V
50 mV=0.05000 V
60 mV=0.06000 V
70 mV=0.07000 V
80 mV=0.08000 V
90 mV=0.09000 V
100 mV=0.10000 V
200 mV=0.20000 V
300 mV=0.30000 V
400 mV=0.40000 V
500 mV=0.50000 V
600 mV=0.60000 V
700 mV=0.70000 V
800 mV=0.80000 V
900 mV=0.90000 V
1000 mV=1.00000 V

How to Convert MV to V (Millivolt to Volt)?

We can convert millivolt to volt by using an example.

Example:

Convert 20 Millivolt to Volt?

We know 1 Millivolt = 0.0010000 volt; 1 Volt = 1000.0000000 millivolt.

20 millivolt = ___V

20 × 0.0010000 = 0.02000 V (we know 1 millivolt = 0.0010000 volt)

Answer:

20 millivolt = 0.02000 volt

Millivolts to Volts: Interpreting Sensor Readings

When working with sensor datasheets, oscilloscope measurements, or ADC readings, you often get values in millivolts that need converting to volts for use in Ohm's law or power calculations. Since 1 V = 1,000 mV, divide millivolts by 1,000 to get volts. This conversion appears constantly in circuit design and debugging.

  1. Start with the voltage in millivolts (mV).
  2. Divide by 1,000.
  3. The result is the voltage in volts (V).
  4. Example: 3,300 mV ÷ 1,000 = 3.3 V.
💡 Tip: When working with microcontrollers, your ADC register value multiplied by the reference voltage (in mV) divided by the max ADC value gives you the sensor voltage in mV. Divide by 1,000 only at the final display step — keeping intermediate calculations in mV avoids floating-point rounding errors.

Millivolts to Volts: Common Sensor Outputs

Typical millivolt readings from sensors and their volt equivalents:

MillivoltVolt
4.88 mV0.00488 V
10 mV0.01 V
100 mV0.1 V
250 mV0.25 V
500 mV0.5 V
700 mV0.7 V
1,800 mV1.8 V
3,300 mV3.3 V

Worked Examples: mV to Volts

Question 1: A thermocouple reads 12.5 mV. What is this in volts?

Solution:

V = mV ÷ 1,000

= 12.5 ÷ 1,000

= 0.0125 V

Answer: 12.5 mV = 0.0125 V — this small voltage represents about 300°C for a K-type thermocouple.

Question 2: An audio DAC outputs 2,120 mV RMS. Convert to volts.

Solution:

V = mV ÷ 1,000

= 2,120 ÷ 1,000

= 2.12 V RMS

Answer: 2,120 mV = 2.12 V RMS — a healthy consumer line-level output.

Question 3: A current sense resistor shows 47 mV drop. Express in volts.

Solution:

V = mV ÷ 1,000

= 47 ÷ 1,000

= 0.047 V

Answer: 47 mV = 0.047 V — use with Ohm's law to calculate the current flowing.

Practice: mV to Volts

Try solving these on your own to test your understanding:

  1. Convert 850 mV to volts. (Answer: 0.85 V)
  2. A sensor outputs 33 mV. What is that in volts? (Answer: 0.033 V)
  3. Convert 1,500 mV to volts. (Answer: 1.5 V)
  4. An EMG signal peaks at 5 mV. Express in volts. (Answer: 0.005 V)
  5. Convert 4,200 mV to volts. (Answer: 4.2 V)

Noise Margins and Millivolt Precision

Digital logic defines HIGH and LOW thresholds in millivolts. For 3.3V CMOS logic, a HIGH input must exceed 2,000 mV (2.0 V) and LOW must be below 800 mV (0.8 V). The 1,200 mV gap between them is the noise margin — any interference below this level will not cause errors. When debugging intermittent faults, measuring in millivolts helps identify signals that are dangerously close to threshold boundaries.

Thermocouple Voltage Tables

Thermocouples generate millivolt signals proportional to temperature. A K-type thermocouple produces about 41 µV per °C (0.041 mV/°C). At 500°C, the output is approximately 20.6 mV (0.0206 V). Specialized thermocouple amplifiers (like MAX31855) handle this tiny signal, but understanding the millivolt-to-temperature relationship helps verify calibration and diagnose sensor failures.

Key Takeaways

  • Divide millivolts by 1,000 to get volts.
  • Keep calculations in mV to avoid floating-point errors; convert only for display.
  • Thermocouples output ~0.041 mV per °C (K-type).
  • Digital logic noise margins are defined in millivolts.
  • 700 mV (0.7 V) is the standard silicon diode forward voltage drop.

Millivolt to Volt Conversion Formula

volt = millivolt × 0.0010000

1 millivolt = 0.0010000 volt

1 volt = 1000.0000000 millivolt

Reverse: millivolt = volt × 1000.0000000

Frequently Asked Questions

How many volt are in 1 millivolt?

There are 0.0010000 volt in 1 millivolt. To convert millivolt to volt, multiply the value by 0.0010000.

How do I convert millivolt to volt?

Multiply your millivolt value by 0.0010000 to get the equivalent in volt. For example, 5 millivolt = 5 × 0.0010000 = 0.00500 volt.

How do I convert volt to millivolt?

Multiply your volt value by 1000.0000000 to get the equivalent in millivolt. Alternatively, divide by 0.0010000.

What is 10 millivolt in volt?

10 millivolt is equal to 0.01000 volt.

What is 100 millivolt in volt?

100 millivolt is equal to 0.10000 volt.