The microsecond
The microsecond (µs) equals one-millionth of a second. It is the working unit for CPU clock cycles, memory access latency, and precise scientific timing instrumentation.
Microseconds to Milliseconds Converter
1 µs = 0.001 ms (microsecond → millisecond)
1 µs = 0.001 ms
1 microsecond equals 0.001 milliseconds. To convert microseconds to milliseconds, multiply the microsecond value by 0.001. For quick reference: 1 µs = 0.001 ms, 5 µs = 0.005 ms, 10 µs = 0.01 ms, 100 µs = 0.1 ms.
Formula
Milliseconds = Microseconds × 0.001Quick
How to convert microseconds to milliseconds
Take your value
Start with your value in microseconds.
Multiply by 0.001
Multiply the microsecond value by 0.001. This is the exact conversion factor from microseconds to milliseconds.
Read the result
The product is your value in milliseconds. For example, 5 µs × 0.001 = 0.005 ms.
Conversion formula
The exact factor from microseconds to milliseconds is 0.001.
Milliseconds = Microseconds × 0.001
Microseconds to Milliseconds conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Microseconds (µs) | Milliseconds (ms) |
|---|---|
| 1 µs | 0.001 ms |
| 2 µs | 0.002 ms |
| 3 µs | 0.003 ms |
| 4 µs | 0.004 ms |
| 5 µs | 0.005 ms |
| 6 µs | 0.006 ms |
| 7 µs | 0.007 ms |
| 8 µs | 0.008 ms |
| 9 µs | 0.009 ms |
| 10 µs | 0.01 ms |
| 15 µs | 0.015 ms |
| 20 µs | 0.02 ms |
| 25 µs | 0.025 ms |
| 30 µs | 0.03 ms |
| 45 µs | 0.045 ms |
| 60 µs | 0.06 ms |
| 90 µs | 0.09 ms |
| 100 µs | 0.1 ms |
| 120 µs | 0.12 ms |
| 150 µs | 0.15 ms |
| 180 µs | 0.18 ms |
| 240 µs | 0.24 ms |
| 300 µs | 0.3 ms |
| 360 µs | 0.36 ms |
| 450 µs | 0.45 ms |
| 500 µs | 0.5 ms |
| 600 µs | 0.6 ms |
| 750 µs | 0.75 ms |
| 900 µs | 0.9 ms |
| 1000 µs | 1 ms |
| 1200 µs | 1.2 ms |
| 1500 µs | 1.5 ms |
| 1800 µs | 1.8 ms |
| 2400 µs | 2.4 ms |
| 3000 µs | 3 ms |
| 3600 µs | 3.6 ms |
| 4500 µs | 4.5 ms |
| 6000 µs | 6 ms |
| 7200 µs | 7.2 ms |
| 9000 µs | 9 ms |
| 10000 µs | 10 ms |
| 18000 µs | 18 ms |
| 36000 µs | 36 ms |
| 43200 µs | 43.2 ms |
| 86400 µs | 86.4 ms |
| 172800 µs | 172.8 ms |
| 604800 µs | 604.8 ms |
| 1000000 µs | 1000 ms |
| 31557600 µs | 31558 ms |
| 100000000 µs | 100000 ms |
Real-world reference
A single CPU instruction can execute in a fraction of a microsecond. Light travels about 300 meters in one microsecond.
Frequently asked questions
- How many milliseconds are in 1 microsecond?
- 1 microsecond equals 0.001 milliseconds.
- How do I convert microseconds to milliseconds?
- Multiply the microsecond value by 0.001. So x µs × 0.001 = the equivalent in ms.
- What is 5 microseconds in milliseconds?
- 5 microseconds equals 0.005 milliseconds.
- What is 10 microseconds in milliseconds?
- 10 microseconds equals 0.01 milliseconds.
- What is 100 microseconds in milliseconds?
- 100 microseconds equals 0.1 milliseconds.
- How do I convert back from milliseconds to microseconds?
- Multiply the millisecond value by 1000. For example, 1 ms = 1000 µs.
- Is the microsecond bigger than the millisecond?
- No. 1 microsecond is smaller than 1 millisecond. It takes 1000 microseconds to equal 1 millisecond.
- Are these conversion factors exact?
- The factor is derived directly from the SI definitions of microsecond and millisecond; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the microsecond and the millisecond
The millisecond
The millisecond (ms) equals one-thousandth of a second. It is the standard unit for software response times, network latency, and video frame timing — human reaction time is typically 200–300 ms.