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Convert Hertz to Millihertz

1 hertz = 1,000 millihertz. Multiply the number of hertz by 1000.

Result
1,000

1 Hz = 1,000 mHz

Multiply the number of hertz by 1000.

Results are rounded for display. Double-check values for critical work.

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Popular frequency conversions

Hertz to Millihertz table

HertzMillihertz
1 Hz1,000 mHz
2 Hz2,000 mHz
3 Hz3,000 mHz
4 Hz4,000 mHz
5 Hz5,000 mHz
10 Hz10,000 mHz
20 Hz20,000 mHz
25 Hz25,000 mHz
50 Hz50,000 mHz
100 Hz100,000 mHz
500 Hz500,000 mHz
1000 Hz1,000,000 mHz

About these units

The hertz (Hz) is an SI base or derived unit of frequency.

The millihertz (mHz) is a metric unit of frequency, equal to 0.001 hertz.

Going the other way, 1 millihertz = 0.001 hertz. Processor clocks in gigahertz, engine speeds in RPM, radio in megahertz — frequency is the same quantity with wildly different scales. Convert them here.

Frequently asked

How many millihertz are in a hertz?
1 hertz = 1,000 millihertz.
How do you convert hertz to millihertz?
Multiply the number of hertz by 1000.
What is 10 Hz in mHz?
10 Hz = 10,000 mHz.

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