Machines And Mechanisms calculators
24 calculators Gear Ratio Calculator Find the gear ratio from tooth counts, then get output rpm, output torque with efficiency losses, a second compound stage, and a reverse-solve mode to hit a target ratio.
Open Mechanical Advantage Calculator Find mechanical advantage for a lever, pulley, screw, wedge, ramp, wheel and axle, or forces. Add efficiency for actual MA and solve the effort needed to lift a load.
Open Belt Length Calculator Calculate belt length for a two-pulley system using the exact or engineering-approximation formula. Get wrap angles, straight-run length and a step-by-step solution.
Open BMEP Calculator - Brake Mean Effective Pressure Calculate BMEP from torque and displacement for 2-stroke and 4-stroke engines. Includes reverse solve, power output, unit conversions, and engine benchmark ranges.
Open Carburetor CFM Calculator Find the right carburetor CFM for any engine. Enter displacement, RPM, and volumetric efficiency to get the required airflow plus the nearest standard carb size.
Open Crawl Ratio Calculator Calculate your 4WD crawl ratio from transmission, transfer case, and axle ratios. Get vehicle speed, distance per revolution, and a performance rating.
Open Engine Displacement Calculator Calculate engine displacement from bore, stroke, and cylinder count in cc, litres, or cubic inches. Also reverse-solves bore from a known displacement target.
Open Exhaust Diameter Calculator Find the ideal exhaust pipe diameter for your engine by horsepower or displacement and RPM. Covers single and dual exhaust, turbo engines, and exhaust velocity.
Open Fulcrum Calculator Solve any lever problem: find effort force, load force, fulcrum position or mechanical advantage for Class 1, 2 and 3 levers in metric or imperial units.
Open Lever Calculator Calculate mechanical advantage, effort force, load force, and arm lengths for Class 1, 2, and 3 levers. Metric and imperial units, instant results.
Open Linear Actuator Force Calculator Calculate linear actuator force for inclined, horizontal, or vertical lift. Get gravity, friction, and inertia components plus a design force with safety factor.
Open NPSH Calculator - Net Positive Suction Head Calculate NPSHa for any pump system. Enter pipe size, flow rate, fluid temperature and static head to get NPSHa vs NPSHr with full cavitation margin check.
Open Piston Force Calculator Calculate hydraulic or pneumatic piston extend and retract force, bore area, and effective area. Reverse-solve for required pressure or bore diameter.
Open Piston Speed Calculator Calculate mean piston speed and peak piston speed from engine stroke and RPM. Metric and imperial, with performance bands and engine benchmark table.
Open Prop Pitch Calculator Calculate boat speed from propeller pitch and RPM, or reverse-solve for pitch, RPM, gear ratio, or prop slip. Works in mph, knots, and kph with live step-by-step math.
Open Pulley Calculator Calculate belt drive RPM, belt speed, belt length, torque, and power or find the mechanical advantage of a pulley block. Metric and imperial, with step-by-step working.
Open Pump Horsepower Calculator Calculate water horsepower (WHP), brake horsepower (BHP), and hydraulic pump HP from flow rate, head or pressure, fluid density, and efficiency. Metric and imperial.
Open Shaft Size Calculator Find the minimum shaft diameter for torque, power, combined bending, or torsional rigidity. Solid or hollow, metric or imperial, with material presets and ASME factors.
Open Speeds and Feeds Calculator Calculate CNC milling RPM, feed rate, chipload and MRR from tool diameter, surface speed, flutes and material. Metric and imperial, with recommended starting values.
Open Spring Calculator (Hooke's Law) Calculate spring force, spring constant, displacement, or elastic potential energy using Hooke's Law. Metric and imperial units, worked steps, and a chart included.
Open Spring Rate Calculator Calculate coil spring rate from wire diameter, coil diameter and active coils. Includes wheel rate, motion ratio, spring force and natural frequency.
Open Torsion Spring Calculator Calculate torsion spring torque, spring rate, wire stress, and spring index from wire diameter, coil diameter, active coils, and deflection angle. Metric and imperial.
Open Twist Rate Calculator Barrel twist rate calculator using Miller Twist Rule or Greenhill formula. Get the gyroscopic stability factor with altitude, temperature, and velocity corrections.
Open Wing Loading Calculator Calculate aircraft wing loading, wing cube loading, stall speed, and turn radius. Metric and imperial units, preset aircraft data, and RC model handling categories.
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