Free engineering tools
Engineering Toolbox
Conveyor calculators, unit converters, and engineering reference charts in one browser tab, built by the AQS engineering team for packaging and material handling work. No login. Your converters, calculations, and pinned tools are saved in this browser so you can pick up where you left off.
What's in the toolbox
Eighteen tools across three tabs. Press ⌘K inside the app to jump to any of them by name, size, thread, or fit class.
Conveyor engineering calculators
Sizing and throughput tools built around sanitary belt and MDR conveyors — the same math our engineers use on customer projects.
- Conveyor Flow
Conveyor flow rate calculator for product spacing, belt speed, throughput in packages per minute, accumulation buffers, and merges.
- Conveyor Spec Solver
Conveyor geometry solver for incline and decline sections: solve length, rise, and angle for straight, L, and Z conveyors.
- Belt Load / Throughput
Belt load and throughput calculator converting packages per minute to pounds per hour and per day from product weight and bulk density.
- Belt Pull Calculator
Belt pull calculator for radius and S-conveyors: turn tension, capstan effect, drive horsepower, torque, and wearstrip friction with calibration log.
- Wearstrip Span Calculator
Wearstrip span calculator for UHMW, UltraLube, and HDPE support beams: deflection, overhang, cantilever, and creep limits.
Reference charts
Lookup tables engineers reach for daily: fasteners, gauges, fits, wire, pneumatics, connectors, and machine safety distances.
- Friction Coefficients
Static and kinetic coefficients of friction for common material pairs: steel, aluminum, rubber, plastics, wood, and brass, dry and lubricated.
- Bolt, Tap & Drill
Metric and imperial bolt, tap drill, and clearance hole chart from M3 to M30 and #4 to 3/4", including UNC pilot sizes.
- Sheet Metal Gauge
Sheet metal gauge to thickness conversion for steel, stainless, aluminum, and galvanized, in inches and millimeters.
- Pneumatic Cylinder
Pneumatic cylinder force by bore, rod diameter, and air pressure, for extend and retract strokes in psi and bar.
- Wire Gauge & Ampacity
AWG to mm² wire gauge chart with ampacity ratings and voltage drop for THHN, THWN, XHHW, and other copper conductors.
- Connectors & Protocols
Industrial connector and protocol reference: M8, M12, RJ45, DB9, and USB pinouts for Ethernet/IP, PROFINET, EtherCAT, IO-Link, and DeviceNet.
- Hole/Shaft Tolerance
ISO 286 hole and shaft tolerance lookup for clearance, transition, and interference fits, including H7, h6, g6, f7, k7, n7, and p6.
- Air Fittings & Threads
Air fitting and pipe thread reference covering NPT, NPTF, BSPP, and BSPT, with sealing methods and push-in tube sizes.
- Hub Motor (MDR)
Motorized drive roller (MDR) hub motor selection chart: torque, belt pull, roller width, and RPM.
- Safety & Compliance
Machine safety reference for guard opening distances, light curtain safety distance, performance level (PLr), and noise exposure per OSHA and ISO 13849/13855.
Calculators and converters
Expression, area, and electrical power calculators, plus a unit converter across length, mass, pressure, flow, temperature, and more.
- Expression Calculator
Scientific expression calculator with variables, chained results, square roots, and trig functions, for quick engineering math.
- Area Calculator
Area calculator for rectangles, circles, triangles, ellipses, trapezoids, and half circles, with running memory for totals and square footage.
- Power Calculator
Electrical power calculator: watts, amps, volts, and kW across single- and three-phase AC and DC, with per-equipment panel load totals.
Values are provided as engineering references and should be verified against manufacturer data and applicable codes before use in a final design. Need a conveyor sized and quoted? See our custom sanitary conveyors or talk to an engineer.