Belt Length Calculator Pro vs Machine Utility
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Belt Length Calculator Pro
Calculate the required belt length for drive systems using open or cross belt arrangements. Input pulley diameters and center distance to get the precise belt length needed.
- Open belt arrangement calculation
- Cross belt arrangement calculation
- Input large pulley diameter
- Input small pulley diameter
- Input center length of pulleys
- Provides belt length output
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Belt Length Calculator is a practical mechanical engineering tool for calculating belt length, pulley speed ratio, and belt speed for common belt drive systems. Designed for mechanical engineers, maintenance engineers, plant technicians, machine designers, workshop professionals, and engineering students, the app provides fast and convenient calculations for belt and pulley systems used in industrial machinery and mechanical equipment. The application helps reduce manual calculations and provides useful reference values for belt selection, machine design, maintenance, troubleshooting, and drive system analysis. Included Calculators • Open Belt Length Calculator • Cross Belt Length Calculator • V-Belt Length Calculator • Speed Ratio Calculator • Belt Speed Calculator Open Belt Length Calculate the required belt length for open belt drive arrangements. Enter: • Large Pulley Diameter • Small Pulley Diameter • Center Distance The calculator provides the calculated belt length along with the relevant input and reference values. Cross Belt Length Calculate belt length for crossed belt drive arrangements. Enter the large pulley diameter, small pulley diameter, and center distance to determine the required belt length. This is useful when designing or checking crossed belt drive systems. V-Belt Length Calculate belt length for V-belt drive systems using the appropriate belt length calculation method. This calculator is useful for V-belt selection, replacement, machine maintenance, and mechanical drive design. Speed Ratio Determine the speed relationship between driver and driven pulleys. Enter: • Driver Pulley Diameter • Driven Pulley Diameter • Driver RPM Calculate: • Speed Ratio • Driven Pulley RPM This helps analyze pulley relationships and determine the resulting driven speed. Belt Speed Calculate the linear speed of a belt based on pulley diameter and rotational speed. Results are provided in: • m/s for Metric units • ft/s for Imperial units Features • Open belt length calculation • Cross belt length calculation • V-belt length calculation • Pulley speed ratio calculation • Driven pulley RPM calculation • Belt speed calculation • Metric and Imperial units • Automatic unit conversion • Clear calculation results • Accurate mechanical engineering formulas • Simple and professional interface • Fast calculations • No internet connection required Applications Belt Length Calculator is useful for: • Mechanical Design • Belt Drive Design • Machine Design • Industrial Machinery • Plant Maintenance • Equipment Maintenance • Power Transmission Systems • Workshop Engineering • Manufacturing Equipment • Mechanical Troubleshooting Designed For • Mechanical Engineers • Design Engineers • Maintenance Engineers • Plant Engineers • Machine Designers • Workshop Technicians • Maintenance Technicians • Industrial Professionals • Engineering Students Whether you are selecting a replacement belt, checking an existing pulley system, designing a belt drive, calculating machine speed, or troubleshooting mechanical equipment, Belt Length Calculator provides a convenient engineering reference for everyday belt drive calculations. The app combines multiple belt and pulley calculations in one simple tool, helping save time, reduce manual calculation errors, and improve efficiency during mechanical design and maintenance work.
Machine Utility
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Machine Utility is the definitive precision tool built specifically for professionals in Mechanical Engineering, machining, and Gearbox Design. Leave the cumbersome reference charts, heavy handbooks, and complex manual formulas behind. Machine Utility streamlines your workflow by delivering instant, highly accurate calculations for gear design and manufacturing directly to your device. Whether you are engineering a complex transmission, setting up a machine tool on the shop floor, or running quality control, this app provides the exact technical data you need to ensure flawless execution and maintain strict manufacturing tolerances. Engineered for reliability, Machine Utility is the essential Machinist Tool that replaces guesswork with mathematical certainty. Key Features: Index Gear Ratio Calculator: Quickly and accurately compute indexing gear setups for complex milling and machining operations. Gear Ratio Calculator: Instantly determine exact Gear Ratio reductions, transmission speeds, and torque multipliers. Gear Dimension Calculation: Calculate complete physical dimensions and geometry for custom gear fabrication with absolute precision. Helical Gear & Pinion Module: Access specialized parameters and geometric calculations for designing and manufacturing Helical Gear sets. Gear Span Measurement: Compute precision measurements over pins or balls to ensure exact tooth thickness and strict quality control.
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Verdict
The clearest difference is price: Machine Utility at Free against Belt Length Calculator Pro's $2.99. Machine Utility also leads on update cadence (monthly vs every 41 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Machine Utility is free to download; Belt Length Calculator Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Belt Length Calculator Pro ships an update every 41 months, Machine Utility monthly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Belt Length Calculator Pro | Machine Utility |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 41 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 15.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Imran Pinjara | Avishkruti Solutions |
In-app purchases
Belt Length Calculator Pro
No in-app purchases
Machine Utility
No in-app purchases
Questions
Is Belt Length Calculator Pro free?
Is Machine Utility free?
Do Belt Length Calculator Pro or Machine Utility have ads?
Which is updated more often, Belt Length Calculator Pro or Machine Utility?
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