Mechanical & Civil Engineering
Stress, machine design, manufacturing, hydraulics and aerospace.
80 tools · 5 sub-topics
aerospace
Aerodynamic Lift Calculator
Calculate the lift force produced by a wing given air density, velocity, area, and lift coefficient.
Drag Polar Calculator
Compute induced drag and parasitic drag from a wing's drag polar coefficients.
Wing Aspect Ratio & Oswald Efficiency Calculator
Determine wing aspect ratio from span and area, and estimate its effect on induced drag with Oswald efficiency factor.
Rocket Thrust Calculator
Compute rocket engine thrust from mass flow rate, exhaust velocity, and pressure thrust term.
Tsiolkovsky Rocket Equation Calculator
Calculate the change in velocity (delta-v) a rocket can achieve based on specific impulse and mass ratio.
Orbital Period Calculator
Determine orbital period and semi-major axis for an Earth-orbiting body using Kepler's third law.
Hohmann Transfer Calculator
Compute the total delta-v and transit time for a Hohmann transfer orbit between two circular orbits.
civil
Water Hammer (Joukowsky) Surge Pressure Calculator
Estimate the pressure surge caused by sudden valve closure in a pipeline using the Joukowsky equation.
Surge Tank Height & Oscillation Calculator
Estimate the maximum water surface upsurge in a simple surge tank after sudden load rejection.
Hydraulic Jump Energy Dissipation Calculator
Compute the sequent depth and energy loss of a hydraulic jump in a rectangular open channel.
Broad-Crested Weir Discharge Calculator
Calculate the discharge over a broad-crested weir given head and crest width.
V-Notch (Thomson) Weir Discharge Calculator
Calculate low-flow discharge through a triangular V-notch weir for a given notch angle and head.
Culvert Inlet vs Outlet Control Capacity Calculator
Estimate culvert discharge capacity under inlet control and outlet control conditions for sizing.
Sediment Settling Velocity (Stokes & Hazen) Calculator
Estimate the terminal settling velocity of a sediment particle using Stokes' or Hazen's law.
Coulomb Earth Pressure (Sloping Backfill) Calculator
Calculate active earth pressure on a retaining wall using Coulomb's theory with a sloping backfill.
Sheet Pile Wall Penetration Depth Calculator
Estimate the required penetration depth of a cantilever sheet pile wall in granular soil.
Geogrid Soil Reinforcement Tensile Demand Calculator
Estimate the required tensile strength of a geogrid layer reinforcing a soil slope or wall.
Foundation Settlement (Immediate & Consolidation) Calculator
Estimate immediate elastic settlement and primary consolidation settlement of a shallow foundation.
Pile Group Capacity & Efficiency (Feld Rule) Calculator
Estimate pile group efficiency and total group capacity using the Feld rule for closely spaced piles.
Prestressed Concrete Tendon Loss Calculator
Estimate total prestress losses in a post-tensioned tendon from elastic shortening, friction, and long-term effects.
Concrete Crack Width Control Calculator
Estimate the maximum surface crack width of reinforced concrete under service loads per ACI/Eurocode approaches.
Steel Column Base Plate Thickness Calculator
Determine the required base plate thickness for a steel column per AISC Design Guide 1 methodology.
machine design
Helical Compression Spring Rate Calculator
Calculate the spring rate of a helical compression spring from wire diameter, coil diameter and active coils.
Helical Spring Wahl Correction Factor Calculator
Compute the Wahl stress correction factor and corrected shear stress for a helical spring.
Belleville Disc Spring Stack Calculator
Estimate force and deflection for a stack of Belleville disc springs in parallel or series.
Torsion Spring Deflection & Stress Calculator
Calculate angular deflection and bending stress of a helical torsion spring under an applied moment.
Leaf Spring Deflection & Stress Calculator
Compute maximum deflection and bending stress for a simply supported semi-elliptical leaf spring.
Spur Gear Bending Stress Calculator (Lewis/AGMA)
Estimate root bending stress on spur gear teeth using the Lewis equation with AGMA-style overload and dynamic factors.
Spur Gear Surface Contact Stress Calculator
Estimate Hertzian surface contact (pitting) stress for meshing spur gears using an AGMA-style formula.
Helical Gear Geometry & Axial Force Calculator
Compute the normal module and axial (thrust) force generated by a helical gear from its helix angle.
Bevel Gear Pitch Cone Angle & Thrust Force Calculator
Determine the pitch cone angle of a bevel gear pair and the resulting axial thrust force.
Worm Gear Lead Angle, Efficiency & Sliding Velocity Calculator
Calculate the lead angle, transmission efficiency, and sliding velocity of a worm gear set.
Planetary Epicyclic Gearbox Speed Ratio Calculator
Determine the output speed ratio and torque multiplication of a simple planetary gearbox with a fixed ring.
V-Belt Length & Centre Distance Calculator
Calculate the required V-belt length and contact arc for two pulleys of known diameters and centre distance.
Timing Belt Pitch, Tooth Count & Pulley Diameter Calculator
Compute pulley pitch diameter and required belt tooth count for a timing belt drive from belt pitch and tooth counts.
Roller Chain Link Count & Centre Distance Calculator
Determine the required roller chain link count and actual centre distance for a two-sprocket drive.
Journal Bearing Sommerfeld Number Calculator
Calculate the Sommerfeld number for a hydrodynamic journal bearing to assess lubrication regime.
Ball Bearing L10 Life Calculator
Estimate the L10 fatigue life in millions of revolutions for a ball bearing under load.
Roller Bearing Equivalent Dynamic Load Calculator
Compute the equivalent dynamic radial load for a roller bearing under combined radial and axial loads.
Flywheel Kinetic Energy & Fluctuation Calculator
Determine kinetic energy storage of a flywheel and its coefficient of speed fluctuation.
Disc Brake Stopping Distance & Heat Calculator
Calculate stopping distance, braking torque and heat dissipated by a disc brake during a stop.
Drum Brake Leading/Trailing Shoe Force Calculator
Estimate the actuating force for self-energizing leading and trailing shoes on a drum brake.
Cone Clutch Torque Capacity Calculator
Determine the torque capacity and required axial engagement force of a cone clutch.
Multi-Plate Wet Clutch Torque Calculator
Calculate the transmissible torque of a multi-plate wet friction clutch pack.
manufacturing
Bolt Preload & Tightening Torque Calculator
Calculate required tightening torque for a target bolt preload using the torque coefficient method.
Bolted Joint Separation Safety Margin Calculator
Estimate the safety margin against joint separation for a bolted connection under tensile/shear load.
Fillet Weld Throat Thickness & Allowable Shear Calculator
Calculate fillet weld effective throat thickness and allowable shear load per unit length.
Butt Weld Tensile & Fatigue Strength Calculator
Estimate full-penetration butt weld tensile capacity and fatigue-allowable stress range.
Riveted Lap/Butt Joint Efficiency Calculator
Calculate the efficiency of a riveted lap or butt joint relative to the solid plate strength.
Press-Fit Interference Contact Pressure Calculator
Estimate the contact pressure and required mounting force for a cylindrical press-fit interference joint.
Shrink-Fit Thermal Expansion & Temperature Calculator
Calculate the temperature rise needed to achieve the required clearance for a shrink-fit assembly.
Turning Speed, Feed Rate & Metal Removal Rate Calculator
Calculate spindle RPM, feed rate, and metal removal rate for a lathe turning operation.
Milling SFM & Chip Load Calculator
Calculate spindle speed and table feed for a milling operation from surface footage and chip load.
Drilling Thrust Force, Torque & Motor Power Calculator
Estimate drilling thrust force, torque, and required motor power for a drilling operation.
Sheet Metal Bend Deduction & K-Factor Calculator
Calculate bend allowance and bend deduction for sheet metal forming using the K-factor method.
Sheet Metal Punching Tonnage & Die Clearance Calculator
Calculate the punching force (tonnage) and recommended die clearance for a sheet metal blanking operation.
Deep Drawing Blank Diameter & Draw Ratio Calculator
Calculate the required blank diameter and check the limiting draw ratio for a deep drawing operation.
Taylor's Tool Life Equation Calculator
Estimate tool life or allowable cutting speed using Taylor's tool life equation VT^n = C.
mechanics
Hooke's Law – Young's Modulus Calculator
Calculate stress, strain and Young's modulus for a material under axial load using Hooke's law.
Shear Modulus Calculator
Compute shear modulus G from Young's modulus E and Poisson's ratio v.
Poisson's Ratio Calculator
Determine Poisson's ratio from lateral and axial strain measurements.
Mohr's Circle Principal Stresses Calculator
Compute principal stresses and maximum shear stress using Mohr's circle from a 2D stress state.
Von Mises Equivalent Stress Calculator
Calculate von Mises equivalent stress from principal stresses for ductile yield prediction.
Tresca Maximum Shear Yield Calculator
Evaluate the Tresca (maximum shear stress) yield criterion from principal stresses.
Thin-Walled Pressure Vessel Stress Calculator
Calculate hoop and longitudinal stress in a thin-walled cylindrical pressure vessel.
Thick-Walled Cylinder Lamé Equations Calculator
Compute radial and hoop stresses in a thick-walled cylinder using Lamé's equations.
Torsional Shear Stress in Shafts Calculator
Calculate maximum torsional shear stress in solid or hollow circular shafts under torque.
Shaft Angle of Twist Calculator
Calculate the angle of twist in a circular shaft under torque using theta = TL/JG.
Solid vs Hollow Shaft Comparison Calculator
Compare weight reduction and torque capacity of a hollow shaft versus an equivalent solid shaft.
Keyway Shear and Crushing Stress Calculator
Calculate shear and crushing (bearing) stress in a shaft keyway transmitting torque.
Spline Shaft Torque Capacity Calculator
Estimate torque capacity and tooth bearing stress for a splined shaft connection.
Beam Section Modulus Calculator
Compute the elastic section modulus Z = I/y for a beam cross-section.
Area Moment of Inertia (Parallel Axis) Calculator
Calculate the moment of inertia about a shifted axis using the parallel axis theorem.
Overhanging Beam Bending Moment and Shear Calculator
Calculate maximum bending moment and shear force for a beam with an overhang under a point load.
Fixed-End Continuous Beam Deflection Calculator
Estimate maximum deflection and fixed-end moment for a fixed-end beam under uniform load.
Curved Beam Circumferential Fibre Stress Calculator
Calculate circumferential fibre stress in a curved beam using the Winkler-Bach theory.
Fatigue Endurance Limit (S-N Marin Factors) Calculator
Estimate the corrected endurance limit of a material using Marin surface, size, and load factors.
Goodman/Soderberg/Gerber Mean Stress Criteria Calculator
Evaluate fatigue safety factor using Goodman, Soderberg, and Gerber mean-stress failure criteria.
Miner's Rule Cumulative Fatigue Damage Calculator
Calculate cumulative fatigue damage and remaining life fraction using Miner's rule.
Stress Concentration Factor (Kt) Calculator
Estimate the theoretical stress concentration factor Kt for a notch or hole in a loaded member.