Mechanics Calculator

  • Thin Rod Center of Mass Calculator
    Find the center of mass of two particles along a line from their masses and positions using x_cm = (mā‚xā‚ + mā‚‚xā‚‚)/(mā‚+mā‚‚). Free physics tool.
  • 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.
  • 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.
  • 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.
  • Weight Calculator (W = mg)
    Solve W = m*g for weight, mass, or gravity with full unit conversion (N, lbf, kgf, kg, lb, m/s2, ft/s2). Free physics calculator based on Newton's second law.
  • Velocity Calculator (vĀ² = uĀ² + 2as)
    Solve the kinematic equation vĀ² = uĀ² + 2as for final velocity, initial velocity, acceleration, 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.
  • Average Velocity Calculator (from Initial and Final Velocity)
    Free average velocity calculator: find average, initial, or final velocity using v_avg = (v + u)/2. Mix units (m/s, km/h, mph, ft/s, knots) for constant acceleration.
  • 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.
  • Velocity Calculator (v = u + at)
    Solve v = u + at for final velocity, initial velocity, acceleration, or time. Supports m/s, km/h, mph, knots and more with automatic 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.
  • 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 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.
  • Hooke's Law Calculator (F = -kx)
    Solve Hooke's Law F = -kx for spring force, spring constant, displacement, or the acceleration of an attached mass, with full unit conversion.
  • 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.
  • Displacement, Velocity, Acceleration & Time Calculator
    Solve s = ut + Ā½atĀ² for displacement, initial velocity, acceleration, or time. Pick any unknown, enter the other three with units, and get the SI-accurate answer.
  • 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.
  • Acceleration Units Conversion Calculator
    Convert acceleration between 18 units including m/s2, ft/s2, g (standard gravity), Gal, knot per second and more. Fast, accurate, with the exact multiplier shown.
  • 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.
  • Angular Velocity Unit Converter
    Convert angular velocity between degrees, radians and revolutions per second, minute, hour and day. Enter one value and get all 12 units 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.
  • Thermal Efficiency Calculator
    Calculate the thermal efficiency of a heat engine from heat input and rejected heat. Get Ī· as a fraction and percent, plus net work output.
  • Thermal Conductivity Calculator
    Calculate thermal conductivity k from heat transferred, thickness, area, temperature difference and time using Fourier's law of heat conduction.

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