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Frequency

rpdtorpm

Convert revolutions per day (rpd) to revolutions per minute (rpm).

Factor1 rpd = 0.0006944444 rpm

Converter

rpd

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

Result
1rpm

Rendered to 6 significant figures.

Formula

Formula
rpm = rpd × 0.0006944444

Multiply any value in revolutions per day by 0.0006944444 to obtain the value in revolutions per minute.

Worked example

Convert 1440 rpd to rpm.

  1. 01Start with 1440 rpd.
  2. 02Multiply by the conversion factor: 1440 × 0.0006944444 = 1 rpm.
Result1440 rpd = 1 rpm

Conversion table

rpdrpm
10.00069444
20.0013889
50.0034722
100.0069444
200.013889
500.034722
1000.069444
2000.13889
5000.34722
10000.69444

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from rpd to rpm?
1 rpd equals 0.0006944444 rpm. To convert, multiply the value in revolutions per day by 0.0006944444.
How do I convert 1 rpd to rpm?
1 rpd = 0.000694444 rpm. For any value, multiply by 0.0006944444.
How do I convert rpm back to rpd?
Divide by the same factor — or equivalently, multiply by 1440. So 1 rpm = 1440 rpd.
When would I need to convert revolution per day to revolution per minute?
Frequency conversions between rpd and rpm 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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