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Frequency

rpdtoHz

Convert revolutions per day (rpd) to hertz (Hz).

Factor1 rpd = 1.157407e-5 Hz

Converter

rpd

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1Hz

Rendered to 6 significant figures.

Formula

Formula
Hz = rpd × 1.157407e-5

Multiply any value in revolutions per day by 1.157407e-5 to obtain the value in hertz.

Worked example

Convert 86400 rpd to Hz.

  1. 01Start with 86400 rpd.
  2. 02Multiply by the conversion factor: 86400 × 1.157407e-5 = 1 Hz.
Result86400 rpd = 1 Hz

Conversion table

rpdHz
11.1574e-5
22.3148e-5
55.787e-5
100.00011574
200.00023148
500.0005787
1000.0011574
2000.0023148
5000.005787
10000.011574

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from rpd to Hz?
1 rpd equals 1.157407e-5 Hz. To convert, multiply the value in revolutions per day by 1.157407e-5.
How do I convert 1 rpd to Hz?
1 rpd = 1.15741e-5 Hz. For any value, multiply by 1.157407e-5.
How do I convert Hz back to rpd?
Divide by the same factor — or equivalently, multiply by 86400. So 1 Hz = 86400 rpd.
When would I need to convert revolution per day to hertz?
Frequency conversions between rpd and Hz are needed in signal and RF engineering, motor and turbomachinery rotational-speed work, vibration and pulse-rate analysis, and control-loop sample-rate specification. Hz dominates electronics and instrumentation; kHz, MHz and GHz cover audio through microwave; rpm and rps dominate mechanical rotational equipment; cycles per minute, second and hour cover slow industrial cyclic processes. Angular frequency (rad/s) and time-period (Hz ↔ seconds) conversions are NOT included — they require either a 2π factor or a reciprocal relationship.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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