How to Convert Milliseconds to Nanoseconds (ms to ns)
Time conversions help with project planning, payroll hours and working out how long a loan or COE period really is. This guide shows how to convert milliseconds into nanoseconds by hand, with examples and a quick-reference table.
The conversion
To convert milliseconds to nanoseconds, multiply the value by 1,000,000. To go the other way, divide by the same number (or multiply by 1.000000e-06). For a quick estimate, multiply by about 1,000,000.
Nanoseconds = milliseconds × 1,000,000
Worked examples
- 3 ms = 3,000,000 ns
- 12.5 ms = 12,500,000 ns
- 75 ms = 75,000,000 ns
Milliseconds to Nanoseconds table
| Milliseconds | Nanoseconds |
|---|---|
| 1 ms | 1,000,000 ns |
| 2 ms | 2,000,000 ns |
| 5 ms | 5,000,000 ns |
| 10 ms | 10,000,000 ns |
| 20 ms | 20,000,000 ns |
| 25 ms | 25,000,000 ns |
| 50 ms | 50,000,000 ns |
| 100 ms | 100,000,000 ns |
| 250 ms | 250,000,000 ns |
| 500 ms | 500,000,000 ns |
| 1,000 ms | 1,000,000,000 ns |
Common questions
Is ms to ns exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Nanoseconds to Milliseconds converter.
Mistakes to avoid
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Milliseconds to Nanoseconds Converter or browse all time converters.
Run your own numbers: Milliseconds to Nanoseconds Converter