# Belt Calculator: V-Belt Length — Pulley, Sheave & Center Dist

> Pulley, Sheave & Center Dist (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/belt-calculator-v-belt-length/id6761038638 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities, Productivity
- Price: $1.99 (on sale, was $9.99)
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-03-25
- Data updated: 2026-09-07
- User reviews in markdown: https://appshunter.io/ios/app/belt-calculator-v-belt-length/id6761038638/reviews.md

## What is Belt Calculator?

Need the exact belt length for a two-pulley drive but hate digging through engineering tables? Tired of ordering the wrong V-belt size and waiting for a replacement? This calculator gives you the answer in seconds.

Enter your pulley diameters and center distance, get the belt length instantly. Also calculates wrap angle and speed ratio for proper drive design.

WHAT IT CALCULATES:
- Belt length from pulley diameters and center distance
- Wrap angle on each sheave
- Speed ratio between driver and driven

KEY FEATURES:
- Two-pulley open drive geometry, valid for V-belt or flat belt
- Quick-pick presets for common pulley pairs (8 SAE, 8 metric)
- Metric and imperial units
- Works completely offline
- No account or login required

Built for maintenance techs, millwrights, HVAC technicians, and mechanical engineers working with belt-driven equipment.


## Version history (last 4 releases)

### 1.0.3 — 2026-09-03

Updated app name and metadata.

### 1.0.2 — 2026-06-28

Added a More Pro Tools section to discover related field calculators.

### 1.0.1 — 2026-04-15

Bug fixes and performance improvements.

### 1.0 — 2026-03-25

No release notes.

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All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*