Pulley and Belt Calculator
Pulley and Belt Calculator

This page is not an official page of the app or its developer, but an independent editorial publication created for informational and commentary purposes. Unless expressly stated otherwise, neither the app nor its developer is affiliated with, endorsed by, sponsored by, authorized by, or otherwise officially connected with MWM, Apple, Google Play, the app publisher, or the app's developer, and nothing on this page implies that the app was developed using MWM's services. Any trademarks, logos, screenshots, and other content remain the property of their respective owners.

Logo of Pulley and Belt Calculator

Pulley and Belt Calculator

Instantly compute drive ratios, belt lengths, and multi-stage RPM with interactive diagrams. Designed for engineers, mechanics, and DIY makers who demand professional accuracy, offline and ad-free.

Key Figures

Downloads

100+

User Rating

1.0/5

Total Ratings

0

Publisher

Vladislav Zhirnov

Category

Utilities

Locales

32

Latest Version

1.0

Size

2.9 MB

First Released

Jan 10, 2026
Features

Precision Engineering at Your Fingertips

Simplify complex drive systems with instant calculations, interactive visual simulations, and professional-grade documentation—all optimized for the shop floor.

Multi-Stage Drive Logic

Chain up to 4 pulley stages to instantly determine overall gear ratios and final RPMs for complex speed reductions or increases.

Interactive Visual Diagrams

Visualize rotational motion and belt slack with animated, scaled diagrams to confirm your mechanical design before you cut or fabricate.

The following screenshots and description are sourced directly from the app's official store listing and are the property of the app developer.

App Store

Screenshots

Pulley and Belt Calculator - Main menu screen of the Pulley and Belt app featuring two-pulley and multi-stage calculator options

Main menu screen of the Pulley and Belt app featuring two-pulley and multi-stage calculator options

Pulley and Belt Calculator - Two-pulley calculation screen in the Pulley and Belt Calculator app showing inputs for diameters and center distance with calculated results.

Two-pulley calculation screen in the Pulley and Belt Calculator app showing inputs for diameters and center distance with calculated results.

Pulley and Belt Calculator - Two-pulley system calculation results and RPM gauge visualization in the Pulley and Belt Calculator app

Two-pulley system calculation results and RPM gauge visualization in the Pulley and Belt Calculator app

Pulley and Belt Calculator - Interactive diagram of a two pulley belt drive system showing mechanical calculations like RPM and belt length

Interactive diagram of a two pulley belt drive system showing mechanical calculations like RPM and belt length

Pulley and Belt Calculator - Interface of the Pulley and Belt Calculator app showing configuration for multiple pulley sets with technical inputs for RPM and diameters

Interface of the Pulley and Belt Calculator app showing configuration for multiple pulley sets with technical inputs for RPM and diameters

Pulley and Belt Calculator - Interactive diagram of a multi-stage pulley system showing calculated ratios and RPM values in the app.

Interactive diagram of a multi-stage pulley system showing calculated ratios and RPM values in the app.

Pulley and Belt Calculator - Technical diagram of a multi-stage pulley and belt system showing RPM and diameters

Technical diagram of a multi-stage pulley and belt system showing RPM and diameters

Description

Pulley & Belt Calculator instantly computes drive ratios, belt lengths, and pulley speeds (RPM) for both single and multi-stage belt drive systems. It takes the guesswork out of designing and tuning your mechanical projects. Designed for engineers, mechanics, and DIY makers, this app offers two dedicated calculation modes with rich visual diagrams to simplify complex pulley setups. Key Features: Two-Pulley Calculator: Calculate a two-pulley setup with ease. Input pulley diameters, center distance, and a known RPM to get the belt length, driven pulley RPM, speed ratio, and contact angles for your system. Multi-Stage Calculator: Chain 2–4 pulley stages (multiple belts) to determine the overall gear ratio and final output RPM. Ideal for designing speed reductions or increases across several pulley sets. Includes a quick toggle for setting the initial driver on the bottom or top, accommodating both reduction and step-up scenarios. Quick Adjust Tool: Fine-tune center distances effortlessly. This feature automatically equalizes the belt slack (gap) between pulleys on all stages for an optimal fit – especially useful in confined spaces or when you want uniform tension across belts. Interactive Diagrams: Visualize your pulley system in action. The app provides animated, scaled diagrams of your belt drive, along with an RPM gauge, so you can see relative speeds and rotational motion in real time. This helps you intuitively understand the system’s behavior. Export & Share: Save and share your results. With one tap, export a PDF report of your calculations – including inputs, results, and schematic diagrams – perfect for project documentation or collaboration. (For example, similar apps allow sharing results via text or email, and we’ve built this app to integrate seamless export for your convenience.) User-Friendly & Offline: Enjoy a clean, ad-free experience. The interface is intuitive, with all inputs and results displayed clearly. All calculations run offline on your device (no internet required). Unit support is in metric (millimeters) for precise input; this caters to standard engineering measurements and ensures high accuracy in results. Whether you’re a professional building industrial machinery or a hobbyist tuning an automotive belt drive, Pulley & Belt Calculator provides accurate results in seconds. It’s a must-have tool for anyone working with belt-driven systems – empowering you to design, optimize, and troubleshoot pulley setups with confidence and precision. Download now and take control of your pulley projects!

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This page is not an official page of the app or its developer, but an independent editorial publication created for informational and commentary purposes. Unless expressly stated otherwise, neither the app nor its developer is affiliated with, endorsed by, sponsored by, authorized by, or otherwise officially connected with MWM, Apple, Google Play, the app publisher, or the app's developer, and nothing on this page implies that the app was developed using MWM's services. Any trademarks, logos, screenshots, and other content remain the property of their respective owners.