Pulley Calculator 4+

Pulley Size, RPM, Speed etc


Designed for iPad

    • 3.8 • 24 Ratings
    • $2.99



Pulley Calculator is a engineering calculator to calculate Belt Length, Ratio, RPM, Belt Speed, Pulley Gap.

- Instant calculation
- Result are copy able to other apps
- RPM are calculate once one of the RPM[Larger or Small] receive input
- Formulas are include as reference

A pulley is simply a wheel with a groove in it, and a rope in the groove. It is also called a drum or a sheave. The groove is important because it helps to keep the rope in place. It is used to lift up or lower heavy objects. With a pulley, an object to be lifted can be tied to one end of the rope, and a force is applied to the other end by pulling the rope downwards. The downward force turns the wheel with the rope and pulls the load upwards at the other end.

it designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt. In the case of a pulley supported by a frame or shell that does not transfer power to a shaft, but is used to guide the cable or exert a force, the supporting shell is called a block, and the pulley may be called a sheave.

A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.

Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

What’s New

Version 1.1

- Update for Newest Devices.

Ratings and Reviews

3.8 out of 5
24 Ratings

24 Ratings

w were Rey fcchyh ,

Pulley Calc

Works Great, But Needs Landscape Mode for iPad

Buck Rogers Brain ,

Great app.

Simple. Never fails.

NH.Boy ,

Great App, but needs one simple feature

The app does exactly what it’s supposed to do, but needs the option to view/input imperial dimensions.

App Privacy

The developer, Nitrio, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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