Milliseconds to Microseconds Converter
Enter the time in milliseconds below to convert it to microseconds.
Convert Milliseconds to Microseconds
Enter a value in milliseconds (ms) to convert to microseconds (µs).
Millisecond to Microsecond Conversion Table
Table showing various millisecond measurements converted to microseconds. Click any preset value or arrow to load it into the converter.
How to Convert Milliseconds to Microseconds
To convert milliseconds to microseconds, multiply the time by the following conversion ratio: 1,000 microseconds/millisecond.
Since one millisecond is equal to 1,000 microseconds, you can use this simple formula to convert:
The time in microseconds is equal to the time in milliseconds multiplied by 1,000.
For example, here's how to convert 5 milliseconds to microseconds using the formula above.
How Many Microseconds Are in a Millisecond?
There are 1,000 microseconds in a millisecond, which is why we use this value in the formula above.
Our millisecond to microsecond calculator automatically converts your time measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliseconds and microseconds are both units used to measure time. Keep reading to learn more about each unit.
What Is a Millisecond?
A millisecond is a unit of time equal to 1/1,000 of a second (0.001 s). One-thousandth of a second (10⁻³ s). [1]
The millisecond is classified as a metric and SI-compatible unit of time. Milliseconds can be abbreviated as ms; for example, 1 millisecond can be written as 1 ms.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millisecond (ms) a convenient decimal multiple of the second (s).
In practice, milliseconds (ms) are widely used across fine-tolerance laboratory, analytical, and micro-scale time measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Microsecond?
A microsecond is a unit of time equal to 1/1,000,000 of a second (0.000001 s). One-millionth of a second (10⁻⁶ s). [2]
The microsecond is classified as a metric and SI-compatible unit of time. Microseconds can be abbreviated as µs; for example, 1 microsecond can be written as 1 µs.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the microsecond (µs) a convenient decimal multiple of the second (s).
In practice, microseconds (µs) are widely used across fine-tolerance laboratory, analytical, and micro-scale time measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting time between milliseconds (ms) and microseconds (µs), keep full floating-point precision (1 ms = 1,000 µs; 1 µs = 0.001 ms) during intermediate calculations and round only the final microsecond figure to match your instrument tolerance.
More Millisecond & Microsecond Conversions
Need to calculate in the opposite direction? Use our microseconds to milliseconds calculator to switch your starting unit immediately. You can also explore related tools such as converting microseconds to milliseconds, converting milliseconds to seconds, or converting seconds to minutes.
Convert from Milliseconds
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Time)·Time Metrology Standard — Milliseconds (ms) to Microseconds (µs)
- [2]BIPM SpecificationBIPM (SI Base Unit: Second (s))·Unit Specifications: Millisecond (ms) & Microsecond (µs)
- [3]NIST CUU ReferenceNIST CUU (Non-SI Units Accepted for Use (min, h, d))·Conversion Factors & Mathematical Basis (ms to µs)