Cycle per second to Degrees per minute
cps
°/min
Conversion History
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Quick Reference Table (Cycle per second to Degrees per minute)
| Cycle per second (cps) | Degrees per minute (°/min) |
|---|---|
| 20 | 432,000 |
| 50 | 1,080,000 |
| 60 | 1,296,000 |
| 440 | 9,504,000 |
| 1,000 | 21,600,000 |
| 20,000 | 432,000,000 |
About Cycle per second (cps)
Cycle per second (cps) is the older, pre-SI term for what is now called hertz. One cycle per second equals exactly one hertz. The term was in common use through the mid-20th century in electrical engineering and acoustics — specifications for audio equipment, radio equipment, and mains electricity were all stated in cycles per second. The SI formally replaced "cycles per second" with "hertz" in 1960, and the change was widely adopted through the 1960s–70s. Some older technical literature and vintage equipment datasheets still use cps.
A 1950s amplifier spec sheet listing "frequency response 20–20,000 cps" means the same as 20 Hz–20 kHz. The US mains supply was described as "60 cps" before 1960.
About Degrees per minute (°/min)
Degrees per minute (°/min) measures slow angular rotation in a unit accessible without decimals. Clock hands move at well-known rates in °/min: the minute hand at 6°/min, the hour hand at 0.5°/min. Solar tracking mounts move at about 0.25°/min to follow the Sun across the sky. Slow geological rotations, antenna steering drives, and industrial rotary kilns are among systems where °/min is convenient. One degree per minute equals 1/60 of a degree per second.
A clock minute hand sweeps at exactly 6°/min. A solar panel tracker follows the Sun at ~0.25°/min. A slowly rotating cement kiln may turn at 1–5°/min.
Cycle per second – Frequently Asked Questions
Why did the SI replace "cycles per second" with "hertz" in 1960?
The General Conference on Weights and Measures wanted consistent named units honoring key physicists, paralleling the watt, volt, and ampere. "Cycles per second" was descriptive but wordy, and it didn't follow the pattern of one-word unit names. Heinrich Hertz — who proved electromagnetic waves exist — was the obvious namesake. The swap was official from 1960, though many engineers kept saying "cps" well into the 1970s.
Are there any situations where "cycles per second" is still preferred over hertz?
In some vintage audio and ham radio communities, "cps" persists as nostalgic shorthand. More practically, it survives in teaching contexts where making the physical meaning explicit is helpful — telling a student that 440 cps means "440 complete vibrations each second" is more intuitive than "440 Hz" until they have internalised the unit. Officially, though, every standards body has switched to hertz.
If cycles per second and hertz are identical, why does this converter page exist?
Because people searching for "cycles per second to hertz" are usually reading an old textbook or datasheet that uses cps and want confirmation that it is a 1:1 equivalence — no multiplication needed. The conversion factor is exactly 1, but verifying that still saves someone a trip to the library or a forum post.
What did equipment spec sheets look like before hertz was adopted?
A 1950s oscilloscope might list its bandwidth as "DC to 5,000,000 cps." A radio receiver would specify "tuning range: 540 to 1,600 kc/s" (kilocycles per second). Turntable specs read "wow and flutter: 0.15% at 33⅓ cps." After 1960, "kc/s" became "kHz" and "Mc/s" became "MHz," but the underlying numbers stayed identical.
How is "cycles per second" different from "radians per second"?
One cycle is one full oscillation — from peak to peak. One radian is about 1/6.28 of a full circle. So 1 cycle per second = 2π radians per second ≈ 6.283 rad/s. Engineers use radians per second in equations where angular measure matters (torque, rotational inertia), and cycles per second (hertz) when counting whole oscillations. Forgetting the 2π factor is one of the most common mistakes in physics homework.
Degrees per minute – Frequently Asked Questions
Why does a clock minute hand move at exactly 6 degrees per minute?
A full circle is 360° and the minute hand completes it in 60 minutes: 360 ÷ 60 = 6°/min. It is one of those satisfying integer results in everyday physics. The hour hand, by contrast, moves at 0.5°/min (360° ÷ 720 minutes). At any given time, the angle between them changes at 5.5°/min — which is the key to solving those "when do the hands overlap?" puzzles.
How fast does a solar tracker panel rotate to follow the Sun?
The Sun crosses the sky at 15°/hr (360° ÷ 24 h), or 0.25°/min. A single-axis solar tracker matches this rate, adjusting continuously or in small steps throughout the day. Dual-axis trackers also compensate for the Sun's seasonal altitude change — a much slower adjustment of roughly 0.5–1° per week. The daily tracking rate of 0.25°/min is slow enough that you cannot see the panel moving.
What rotational speed in °/min do cement kilns and industrial drums operate at?
Large rotary cement kilns typically rotate at 1–5°/min (roughly 0.003–0.014 RPM). That glacial pace is intentional: raw material needs 30–60 minutes to travel the kiln's 50–100 meter length, slowly heating to 1,450°C. Faster rotation would push material through before it fully reacts. Industrial drum dryers and composting drums operate in a similar 2–10°/min range.
How do you convert degrees per minute to RPM?
Divide by 360. One full revolution is 360°, so degrees per minute ÷ 360 = RPM. The clock minute hand at 6°/min is 6/360 = 0.01667 RPM — one revolution per hour. A turntable at 33⅓ RPM is 33.33 × 360 = 12,000°/min. For rad/min, multiply °/min by π/180 ≈ 0.01745.
What °/min rate does a rotating restaurant turn at?
Most revolving restaurants complete one full rotation in 45–90 minutes, which translates to 4–8°/min. The slow rate is deliberate — fast enough that diners get a complete panoramic view during a meal, but slow enough that you do not notice the motion or feel any inertia. The famous revolving restaurant atop the BT Tower in London took about 22 minutes per revolution (16.4°/min) when it operated.