Mechanics Calculator

  • Motor Power Calculator
    Calculate mechanical motor power from torque and RPM. P = T Ɨ 2Ļ€Ā·RPM/60, with instant output in watts, kilowatts and horsepower.
  • Thermal Stress Calculator
    Calculate thermal stress in a fully constrained material from Young's modulus, thermal expansion coefficient, and temperature change using Ļƒ = EĀ·Ī±Ā·Ī”T.
  • Maximum Static Friction Calculator
    Calculate the maximum static friction force from the coefficient of static friction and the normal force using F_s,max = Ī¼_s Ā· N. Free physics tool.
  • Work-Energy Theorem Calculator
    Calculate net work done on an object using the work-energy theorem: W = Ī”KE = Ā½m(vfĀ²āˆ’viĀ²). Enter mass and initial/final velocities to get work in joules.
  • Pump Hydraulic Horsepower Calculator
    Calculate pump hydraulic horsepower (HHP) from flow rate (GPM), total head (ft), and fluid specific gravity. Free, instant water horsepower calculator.
  • Torque from Moment of Inertia Calculator
    Calculate the torque required to rotate an object using Ļ„ = IĀ·Ī±. Enter the moment of inertia and angular acceleration to get torque in NĀ·m instantly.
  • Spring Constant Combination Calculator
    Calculate the equivalent spring constant for springs in series or parallel. Enter up to 4 spring constants and get the combined stiffness instantly.
  • Radius of Gyration Calculator
    Calculate the radius of gyration k from moment of inertia and mass (k=āˆš(I/m)) or area (k=āˆš(I/A)). Free, instant, with worked example and formula.
  • Parallel Axis Theorem Calculator
    Calculate moment of inertia about any parallel axis using the parallel axis theorem I = I_cm + mĀ·dĀ². Enter I_cm, mass, and axis distance.
  • Moment of a Force Calculator
    Calculate the moment of a force (torque) instantly with M = FĀ·d. Enter force in newtons and perpendicular distance in metres to get NĀ·m.
  • Vertical Jump Height Calculator
    Calculate your vertical jump height from hang time using physics. Enter your air time in seconds to get jump height in cm, meters, and inches.
  • Work Calculator (W = Fs)
    Solve the physics work equation W = F.s, or W = F.s.cos(theta), for work, force, or displacement. Multiple units and significant-figure control.
  • Kinetic Energy Calculator
    Solve the kinetic energy equation KE = 1/2 m v^2 for kinetic energy, mass, or velocity. Supports many units (J, kJ, kWh, kg, lb, m/s, km/h) with auto conversion.
  • Uniformly Accelerated Motion Calculator
    Solve 1D constant-acceleration (SUVAT) motion. Enter any 3 of u, v, s, a, t and get the other two, with the kinematic equations used and unit conversion.
  • Pressure Calculator (P = F / A)
    Solve pressure, force, or area with P = F / A. Enter any two values with their own units (Pa, bar, psi, atm, N, lbf, m2, in2) and get the third instantly.
  • Momentum Calculator (p = mv)
    Solve linear momentum p = mĀ·v for momentum, mass, or velocity with selectable units (kg, g, lb, m/s, km/h, NĀ·s and more) and significant-figure control.
  • Impulse Calculator (J = Ft)
    Solve the impulse equation J = F·t for impulse, force, or time. Supports many force, time and impulse units plus significant-figure rounding.
  • Force Calculator (F = ma)
    Solve Newton's second law F = m a for force, mass, or acceleration. Full unit selection on every variable plus significant-figure control.
  • Displacement, Velocity & Time Calculator
    Solve s = v x t for displacement, average velocity, or time. Supports metric and imperial units (m, ft, mi, km/h, mi/h) with significant-figure rounding.
  • Momentum Unit Converter
    Convert momentum (impulse) between kgĀ·m/s, NĀ·s, dyneĀ·s, kNĀ·s, MNĀ·s, lbfĀ·s and poundĀ·ft/s. Enter a value, pick from/to units, get an instant result and factor.
  • Stefan-Boltzmann Radiation Calculator
    Calculate thermal radiation power with the Stefan-Boltzmann law P = ĪµĻƒATā“. Enter emissivity, surface area and absolute temperature to get watts radiated.
  • Hull Speed Calculator
    Calculate the theoretical hull speed of a displacement boat from its waterline length (LWL) in feet. Get results in knots, mph, and km/h instantly.
  • Human Punch Force Calculator
    Calculate human punch force in newtons, pounds-force and kgf using fist mass, impact velocity and contact time with the impulse-momentum formula.
  • Torque Unit Conversion Calculator
    Convert torque (moment of force) between 12 units across metric SI, gravitational-metric and imperial systems: N.m, kgf.m, lbf.ft, ozf.in and more.

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