How do I convert ms to µs?

Use the formula shown above or enter a value to see ms converted to µs instantly.

What is the formula for ms to µs?

The converter calculates µs by applying the category-specific conversion factor for Time.

When should I use ms vs µs?

ms and µs are both part of the Time category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Time Conversion Reference

Convert ms to µs

Use the live converter below to translate between Millisecond (ms) and Microsecond (µs). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

ms → µs

Millisecond

Microsecond

1,000

µs

Rounded result (4 decimals max)

Formula

1 ms = 1,000 µs

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from µs to ms.

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ms to µs quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Millisecond (ms)	Microsecond (µs)
0.25 ms	250 µs
0.5 ms	500 µs
1 ms	1,000 µs
2 ms	2,000 µs
5 ms	5,000 µs
10 ms	10,000 µs
25 ms	25,000 µs
100 ms	100,000 µs

µs back to ms

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Microsecond (µs)	Millisecond (ms)
0.25 µs	0.0003 ms
0.5 µs	0.0005 ms
1 µs	0.001 ms
2 µs	0.002 ms
5 µs	0.005 ms
10 µs	0.01 ms
25 µs	0.025 ms
100 µs	0.1 ms

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Compare all time conversion reference

View the full unit roster, charts, and tips for Time Conversion Reference conversions.

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