Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
Kilovolts to Millivolts Converter
1 kV = 1,000,000 mV. Enter a value to convert kV to mV, then use the formula and table below. Displayed digits may be rounded.
Electrical unitsInstant result
Decimals
Formula result = input × 1000 ÷ 0.001. 1 kV = 1,000,000 mV
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Volts1,000 V
Millivolts1,000,000 mV
Microvolts1,000,000,000 µV
Conversion table
| kV | mV |
|---|---|
| 1 kV | 1,000,000 mV |
| 2 kV | 2,000,000 mV |
| 5 kV | 5,000,000 mV |
| 10 kV | 10,000,000 mV |
| 25 kV | 25,000,000 mV |
| 50 kV | 50,000,000 mV |
| 100 kV | 100,000,000 mV |
Conversion chart
1 kV1,000,000 mV
5 kV5,000,000 mV
10 kV10,000,000 mV
25 kV25,000,000 mV
50 kV50,000,000 mV
Worked example
1 kV = 1,000,000 mV. Apply the selected conversion formula to other input values.
Unit definition
Kilovolts (kV) One kilovolts equals 1,000 volt.
Unit history
Kilovolts is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert kV to volt.
3. Convert the base value to mV and apply your display precision.
Understand the result before using it
Kilovolts to Millivolts converts a value measured in Kilovolts (kV) into the equivalent value in Millivolts (mV). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1000 ÷ 0.001
Assumptions
- Kilovolts and Millivolts represent the same voltage quantity.
- The input is expressed in kV; the output is expressed in mV.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 kV = 1,000,000 mV. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a kV measurement in a document that expects mV.
- Compare a kilovolts value with a value reported in millivolts.
- Check the kV to mV arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse kV with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Kilovolts to Millivolts?
result = input × 1000 ÷ 0.001. Input is in kV; result is in mV. 1 kV = 1,000,000 mV. The displayed digits may be rounded.
What is 1 kV in mV?
1 kV = 1,000,000 mV. The displayed digits may be rounded.
Can I reverse the kV to mV conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts mV back to kV.
Is the Kilovolts to Millivolts result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.