---
title: "Pulley Calculator - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Pulley Calculator is a engineering calculator to calculate Belt Length, Ratio, RPM, Belt Speed, Pulley Gap.  Features: - Instant calculation - Result are copy able to other apps - RPM are calculate on"
---

# Pulley Calculator — United States
> Pulley Size, RPM, Speed etc

![Pulley Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/76/b3/b4/76b3b45d-de6b-f664-e562-bca76db1267e/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Tan Chia Ling](https://apptail.io/developer/tan-chia-ling-OaL)
**Category:** Utilities
**Rating:** 3.7/5 (34 ratings)
**Price:** Free
**Bundle ID:** com.nitrio.pulleycalc
**Store:** Apple App Store
**Country:** United States
**Version:** 1.2 (released 2026-01-06)
**Original Release:** 2018-06-21
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1388205210)
**AppTail Page:** [https://apptail.io/app/pulley-calculator-ZyGb/united-states](https://apptail.io/app/pulley-calculator-ZyGb/united-states)

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

Features:
- 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.

## Pulley Calculator Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/20/a3/f2/20a3f224-d1cc-acc5-ee52-78641bc0ffae/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.00.14.jpg/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/86/e4/d0/86e4d088-5357-3bc3-41fa-1a5b41dc4062/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.00.16.jpg/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/53/1a/c0/531ac070-6ece-b775-f5b0-3e77178e13cd/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.00.42.jpg/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/02/eb/db/02ebdbb1-3e94-52b3-82b7-bdac91f61b04/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.00.47.jpg/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/d3/5e/ab/d35eaba5-9eac-b391-919c-3187119bd08c/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.01.01.jpg/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ed/6e/90/ed6e9088-c9a9-289a-a16e-0a53eebb9b61/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.01.34.jpg/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/d9/a6/59/d9a65908-70f3-9acb-995d-ca6600bdfb50/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.01.37.jpg/1284x2778.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/89/b0/79/89b079dd-7023-039e-2a48-7d37d947b645/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.01.15.jpg/1284x2778.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/b8/c4/2f/b8c42f00-02d1-f56a-922e-0e6589863bc7/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.01.17.jpg/1284x2778.png)
- [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/59/98/8d/59988dab-067a-ebc7-68cd-69a8907b87c0/Simulator_Screenshot_-_iPhone_17_-_2025-12-31_at_14.01.51.jpg/1284x2778.png)

## Pulley Calculator Rating Breakdown in United States
- 5 stars: 17 (50%)
- 4 stars: 5 (15%)
- 3 stars: 4 (12%)
- 2 stars: 1 (3%)
- 1 stars: 7 (21%)

## Pulley Calculator Reviews in United States

### *---- "Doesn’t work"
Gives me wrong pulley size ever time
-- bigirv, 2024-12-05

### ***-- "Perfect, but only metric units"
This is an ideal app for simple speed calculations.  I volunteer with antique equipment association where we commonly use flat belt equipment.  There is a frequent need to do speed calculations for machinery.

My only complaint is that all units are in metric.  Shouldn’t make a difference for speeds, but belt speed isn’t useable without conversions.  Wish there was a toggle to convert to imperial measurements
-- Tesla1876, 2024-03-08

### *---- "Millimeter or what?"
Inches?
-- hnjdkoenndkoewm, 2022-03-09

### *---- "What are we looking at"
What are the numbers? Are they Standard or metric? in inches or millimeters?
-- dnknyah, 2022-02-25

### ***** "Great app."
Simple. Never fails.
-- Buck Rogers Brain, 2021-12-23

### ****- "Pulley Calc"
Works Great, But Needs Landscape Mode for iPad
-- w were Rey fcchyh, 2021-07-16

### ***-- "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.
-- NH.Boy, 2018-10-07

[View all Pulley Calculator reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)


## Pulley Calculator Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Algeria | Utilities | #162 |
| Top Paid | South Africa | Utilities | #484 |
| Top Paid | Ecuador | Utilities | #485 |

## Pulley Calculator Discovered Keywords
- pulley calculator

## Apps Similar to Pulley Calculator
- [Fluid Mechanics Calculator](https://apptail.io/app/fluid-mechanics-calculator-Xpc/united-states)
- [Volume of tank Calculator](https://apptail.io/app/volume-of-tank-calculator-wjjc/united-states)
- [CNVRT: SI Unit Conversion Tool](https://apptail.io/app/cnvrt-si-unit-conversion-tool-Zomc/united-states)
- [Duct Calculator Elite](https://apptail.io/app/duct-calculator-elite-CDvc/united-states)
- [Mechanical Engineering Calc](https://apptail.io/app/mechanical-engineering-calc-Vyud/united-states)
- [Belt Length Calculator Pro](https://apptail.io/app/belt-length-calculator-pro-QGle/united-states)
- [Belt Length Calculator CalCon](https://apptail.io/app/belt-length-calculator-calcon-WGle/united-states)
- [Fit Tolerance ISO Pro](https://apptail.io/app/fit-tolerance-iso-pro-JVne/united-states)
- [4-20 Temperature Calculator](https://apptail.io/app/4-20-temperature-calculator-hDqe/united-states)
- [Engineering Toolbox ET](https://apptail.io/app/engineering-toolbox-et-eBOf/united-states)

## Pulley Calculator Available In
- [United States](https://apptail.io/app/pulley-calculator-ZyGb/united-states)
- [United Kingdom](https://apptail.io/app/pulley-calculator-ZyGb/united-kingdom)
- [Canada](https://apptail.io/app/pulley-calculator-ZyGb/canada)
- [Australia](https://apptail.io/app/pulley-calculator-ZyGb/australia)
- [Mexico](https://apptail.io/app/pulley-calculator-ZyGb/mexico)
- [Malaysia](https://apptail.io/app/pulley-calculator-ZyGb/malaysia)
- [Vietnam](https://apptail.io/app/pulley-calculator-ZyGb/vietnam)
- [Peru](https://apptail.io/app/pulley-calculator-ZyGb/peru)
- [Switzerland](https://apptail.io/app/pulley-calculator-ZyGb/switzerland)
- [Chile](https://apptail.io/app/pulley-calculator-ZyGb/chile)
- [China](https://apptail.io/app/pulley-calculator-ZyGb/china)
- [Colombia](https://apptail.io/app/pulley-calculator-ZyGb/colombia)
- [Czechia](https://apptail.io/app/pulley-calculator-ZyGb/czechia)
- [Germany](https://apptail.io/app/pulley-calculator-ZyGb/germany)
- [Denmark](https://apptail.io/app/pulley-calculator-ZyGb/denmark)
- [Dominican Republic](https://apptail.io/app/pulley-calculator-ZyGb/dominican-republic)
- [Algeria](https://apptail.io/app/pulley-calculator-ZyGb/algeria)
- [Ecuador](https://apptail.io/app/pulley-calculator-ZyGb/ecuador)
- [Egypt](https://apptail.io/app/pulley-calculator-ZyGb/egypt)
- [Spain](https://apptail.io/app/pulley-calculator-ZyGb/spain)
- [Finland](https://apptail.io/app/pulley-calculator-ZyGb/finland)
- [France](https://apptail.io/app/pulley-calculator-ZyGb/france)
- [Greece](https://apptail.io/app/pulley-calculator-ZyGb/greece)
- [Hong Kong SAR China](https://apptail.io/app/pulley-calculator-ZyGb/hong-kong)
- [Hungary](https://apptail.io/app/pulley-calculator-ZyGb/hungary)
- [Indonesia](https://apptail.io/app/pulley-calculator-ZyGb/indonesia)
- [Ireland](https://apptail.io/app/pulley-calculator-ZyGb/ireland)
- [Israel](https://apptail.io/app/pulley-calculator-ZyGb/israel)
- [India](https://apptail.io/app/pulley-calculator-ZyGb/india)
- [Italy](https://apptail.io/app/pulley-calculator-ZyGb/italy)
- [Japan](https://apptail.io/app/pulley-calculator-ZyGb/japan)
- [South Korea](https://apptail.io/app/pulley-calculator-ZyGb/south-korea)
- [Kuwait](https://apptail.io/app/pulley-calculator-ZyGb/kuwait)
- [Kazakhstan](https://apptail.io/app/pulley-calculator-ZyGb/kazakhstan)
- [Lebanon](https://apptail.io/app/pulley-calculator-ZyGb/lebanon)
- [Malta](https://apptail.io/app/pulley-calculator-ZyGb/malta)
- [Nigeria](https://apptail.io/app/pulley-calculator-ZyGb/nigeria)
- [Netherlands](https://apptail.io/app/pulley-calculator-ZyGb/netherlands)
- [Norway](https://apptail.io/app/pulley-calculator-ZyGb/norway)
- [New Zealand](https://apptail.io/app/pulley-calculator-ZyGb/new-zealand)
- [Philippines](https://apptail.io/app/pulley-calculator-ZyGb/philippines)
- [Pakistan](https://apptail.io/app/pulley-calculator-ZyGb/pakistan)
- [Poland](https://apptail.io/app/pulley-calculator-ZyGb/poland)
- [Portugal](https://apptail.io/app/pulley-calculator-ZyGb/portugal)
- [Romania](https://apptail.io/app/pulley-calculator-ZyGb/romania)
- [Russia](https://apptail.io/app/pulley-calculator-ZyGb/russia)
- [Saudi Arabia](https://apptail.io/app/pulley-calculator-ZyGb/saudi-arabia)
- [Sweden](https://apptail.io/app/pulley-calculator-ZyGb/sweden)
- [Singapore](https://apptail.io/app/pulley-calculator-ZyGb/singapore)
- [Thailand](https://apptail.io/app/pulley-calculator-ZyGb/thailand)
- [Türkiye](https://apptail.io/app/pulley-calculator-ZyGb/turkey)
- [Taiwan](https://apptail.io/app/pulley-calculator-ZyGb/taiwan)
- [Ukraine](https://apptail.io/app/pulley-calculator-ZyGb/ukraine)
- [United Arab Emirates](https://apptail.io/app/pulley-calculator-ZyGb/united-arab-emirates)
- [South Africa](https://apptail.io/app/pulley-calculator-ZyGb/south-africa)
- [Argentina](https://apptail.io/app/pulley-calculator-ZyGb/argentina)
- [Austria](https://apptail.io/app/pulley-calculator-ZyGb/austria)
- [Azerbaijan](https://apptail.io/app/pulley-calculator-ZyGb/azerbaijan)
- [Belgium](https://apptail.io/app/pulley-calculator-ZyGb/belgium)
- [Bahrain](https://apptail.io/app/pulley-calculator-ZyGb/bahrain)
- [Brazil](https://apptail.io/app/pulley-calculator-ZyGb/brazil)
- [Belarus](https://apptail.io/app/pulley-calculator-ZyGb/belarus)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*