Belt Length Calculator Pro
Belt Drive & Pulley Tools
$2.99 · Designed for iPad. Not verified for macOS.
Calculate open, cross and V-belt lengths, pulley speed ratio and belt speed for mechanical belt drive systems in Metric and Imperial units.
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.
Upgraded to Higher SDK level Support.
Changes in UI/UX.
Added V Belt length Calculator.
Added Speed Ratio Calculator.
Added Belt Speed Calculator.
Added Unit Settings Options.
Removed Decimal Fraction Chart.
Improved Input Field labels and placeholders.
Fix minor bugs/issues.
The developer, Imran Pinjara, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Imran Pinjara
- Size
- 1.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.1 or later.
- iPhone
Requires iOS 16.1 or later. - iPad
Requires iPadOS 16.1 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © letsfab
