1 microsecond =
0.001 milliseconds
1 millisecond =
1,000 microseconds
Handy values
100 µs = 0.1 ms · 1,000 µs = 1 ms · 10,000 µs = 10 ms
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⚡ Microseconds to Milliseconds: the quick answer
1 µs = 0.001 ms
1 microsecond equals 0.001 milliseconds
To convert microseconds to milliseconds, multiply the value by 0.001.
To go the other way, multiply milliseconds by 1,000 to get microseconds.
↔ Convert milliseconds to microseconds instead
🧮 Formula
Every unit here is defined by its time in seconds, so the conversion factor is (seconds per microsecond) ÷ (seconds per millisecond).
📊 Microseconds to Milliseconds conversion table
✏️ Worked examples
📘 About these units
Microsecond (µs). A microsecond is one millionth of a second.
Millisecond (ms). A millisecond is one thousandth of a second, used for reaction times and computer timing.
❓ Frequently asked questions
How many milliseconds are in one microsecond?
There are 0.001 milliseconds in one microsecond.
How do I convert microseconds to milliseconds?
Multiply the number of microseconds by 0.001. For example, 10 microseconds equal 0.01 milliseconds.
How many microseconds are in one millisecond?
One millisecond equals 1,000 microseconds.
How many milliseconds is 1,000 microseconds?
1 millisecond. Other common values: 100 microseconds = 0.1 milliseconds and 10,000 microseconds = 10 milliseconds.
🔗 More time conversions
All time units →
What people are saying
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Anonymous · 22 Oct 2026