Millisecond to Microsecond Converter
Time · unit-converter
Convert Millisecond to Microsecond with a fixed input and output unit, step-by-step formula line, and reference tables. Year = 365 days and month = 30 days in this tool for consistent factors; calendar months and leap years differ in real life.
Calculator
From: Millisecond (ms)
To: Microsecond (us)
About Millisecond
One millisecond is one thousandth of a second. Computing, audio, and reaction times use milliseconds.
About Microsecond
One microsecond is one millionth of a second. Electronics and high-speed measurements use microseconds.
How to convert milliseconds to microseconds
1 millisecond is equal to 1000.00000000000011 microsecond:
1 ms = (0.001 s ÷ 0.000001 s) us = 1000.00000000000011 us
Each millisecond is defined as 0.001 s and each microsecond as 0.000001 s, so one ms equals 0.001 ÷ 0.000001 us = 1000.00000000000011 us.
Let t(ms) be the numeric value of the same duration measured in Millisecond (ms), and t(us) the value in Microsecond (us). Then:
t(us) = t(ms) × (0.001 / 0.000001)
Equivalently, divide by how many ms fit into one us (seconds per us divided by seconds per ms):
t(us) = t(ms) ÷ 0.001
Or: microsecond = millisecond ÷ 0.001
Examples
Example #1: Convert 20 ms to microsecond
20 ms = 20 ms × (0.001/0.000001) us = 20000 us
20 ms = 20 ms ÷ 0.001 = 20000 us
Example #2: Convert 50 ms to microsecond
50 ms = 50 ms × (0.001/0.000001) us = 50000 us
50 ms = 50 ms ÷ 0.001 = 50000 us
Summary
To convert Millisecond to Microsecond, multiply the value in ms by the ratio of seconds per ms divided by seconds per us. Equivalently: value_us = value_ms × (0.001 / 0.000001). Numerically, 1 ms equals 1000.0000000000001 us.
Relationship context
Both units fall in subsecond precision (milliseconds and smaller). Conversions use fixed second counts per unit, so factors stay consistent for estimation and UI math. The factor from Millisecond to Microsecond is 1.000000e+3 (1 ms = 1000.0000000000001 us).
Conversion tables
| Millisecond (ms) | Microsecond (us) |
|---|---|
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 6 | 6,000 |
| 7 | 7,000 |
| 8 | 8,000 |
| 9 | 9,000 |
| Millisecond (ms) | Microsecond (us) |
|---|---|
| 10 | 10,000 |
| 20 | 20,000 |
| 30 | 30,000 |
| 40 | 40,000 |
| 50 | 50,000 |
| 60 | 60,000 |
| 70 | 70,000 |
| 80 | 80,000 |
| 90 | 90,000 |
| 100 | 100,000 |