Electrical
VtomV
Convert volts (V) to millivolts (mV).
Factor1 V = 1000 mV
Converter
V
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mV
Rendered to 6 significant figures.
Formula
Formula
mV = V × 1000
Multiply any value in volts by 1000 to obtain the value in millivolts.
Worked example
Convert 5 V to mV.
- 01Start with 5 V.
- 02Multiply by the conversion factor: 5 × 1000 = 5000 mV.
Result5 V = 5000 mV
Conversion table
| V | mV |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from V to mV?
1 V equals 1000 mV. To convert, multiply the value in volts by 1000.
How do I convert 1 V to mV?
1 V = 1000 mV. For any value, multiply by 1000.
How do I convert mV back to V?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 mV = 0.001 V.
When would I need to convert volt to millivolt?
Voltage conversions between V and mV are routine in instrumentation, power-system analysis and electronics design. Volts and kilovolts dominate power-system documents (LV/MV/HV switchgear, motor ratings), while millivolts and microvolts appear on transducer datasheets, thermocouple signal chains and low-level analog measurements.
Is the conversion exact?
Yes. Both V and mV are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).