Chain Sprocket Calculator Pro

Engineering Kit

About this app

Chain Sprocket Calculator Pro is a roller chain and drive chain calculator for mechanical engineering, machinery, motorcycles, and bicycles.

Design or tune a sprocket and chain drive in seconds. Enter chain pitch, driving and driven sprocket teeth, chain links, and RPM. Get live results for gear ratio, center distance, chain length, pitch diameter, driven RPM, and chain speed—with an animated sprocket and roller chain visualization.

CALCULATE CHAIN & SPROCKET DRIVES
• Gear ratio from driving and driven sprocket teeth
• Center distance for your roller chain setup
• Chain length and even chain link count
• Pitch diameter for each sprocket
• Driven RPM and chain speed from driving RPM
• Standard pitch presets or custom pitch (mm / in)

BUILT FOR REAL WORK
• Engineering & machinery — industrial roller chain drives, conveyors, and power transmission layouts
• Motorcycle — front/rear sprocket swaps, final drive ratio, and chain length checks
• Bicycle — chainring and rear sprocket gearing with chain length and ratio
• Workshop & field use — fast inputs, clear results, save named setups to reuse later

WHY THIS SPROCKET CALCULATOR
Whether you call it a sprocket calculator, chain sprocket calculator, roller chain calculator, or chain drive calculator, the goal is the same: correct ratio, fit, and speed before you cut chain or order parts. Use it to compare sprocket sizes, plan center distance, and confirm chain length without spreadsheet guesswork.

FEATURES
• Live updates as you change pitch, teeth, links, or RPM
• Distance and speed units with adjustable display precision
• Saved setups for machines, bikes, and motorcycle gearing
• Animated dual-sprocket and roller chain view
• Offline-friendly calculator for the shop floor or garage
• One-time purchase — no ads, no subscriptions