Physics and Engineering

  • Power Factor Correction Calculator
    Calculate the kVAR capacitor bank and capacitance (µF) needed to correct power factor from a current to target value at any voltage and frequency.
  • Amps to Volts Calculator
    Convert amps to volts using power (V = P/I) or resistance (V = I×R). Free online amps to volts calculator with worked examples and formulas.
  • Electric Charge Calculator (Q = I × t)
    Calculate electric charge (coulombs) from current and time using Q = I × t. Get charge in coulombs, milliamp-hours, and electron count instantly.
  • kW to kWh Calculator
    Convert kilowatts (kW) to kilowatt-hours (kWh) by multiplying power by running time. Free, instant energy calculator with watt-hour output.
  • Volts to Amps Calculator
    Convert volts to amps using power (I = P/V) or resistance (I = V/R). Free electrical calculator for current in amperes from voltage.
  • Watts to Volts Calculator
    Convert watts to volts instantly. Enter power in watts and current in amps to find voltage using V = P / I. Free online electrical calculator.
  • Deceleration Calculator
    Calculate deceleration (negative acceleration) from initial and final velocity using either distance or time. Get m/s² and equivalent g-force instantly.
  • Crash / Impact Force Calculator
    Calculate the average impact force of a crash or collision from mass, impact speed, and stopping distance. Get force in N, kN, energy, and g-force.
  • RPM to Linear Speed Calculator
    Convert RPM to linear surface speed using v = π × D × RPM. Enter diameter and rotational speed to get m/s, km/h, ft/min, and mph instantly.
  • Simply Supported Beam Deflection Calculator (Center Point Load)
    Calculate the maximum mid-span deflection of a simply supported beam under a central point load using δ = PL³ / (48EI). Free engineering tool.
  • Pulley System Mechanical Advantage Calculator
    Calculate the mechanical advantage of a pulley system and the effort force needed to lift a load. Enter supporting rope segments and load weight.
  • Projectile Maximum Height Calculator
    Find the maximum height of a projectile from its initial velocity and launch angle. Uses H = (v·sinθ)²/(2g) with adjustable gravity.
  • Projectile Time of Flight Calculator
    Calculate the time of flight of a projectile from its initial velocity and launch angle. Also returns maximum height and horizontal range.
  • Power Calculator
    Calculate power in watts from work (energy) and time using P = W / t. Free physics power calculator with horsepower conversion and worked examples.
  • VinFast Home Charger Electricity Cost Calculator
    Estimate the monthly and annual electricity cost of charging your VinFast EV at home based on miles driven, efficiency, and your kWh rate.
  • RF Link Budget Calculator
    Calculate received RF signal power (dBm) from transmit power, antenna gains, path loss, and system losses. Free link budget calculator with EIRP.
  • EIRP Calculator
    Calculate EIRP (Effective Isotropic Radiated Power) in dBm, dBW and watts from transmitter power, antenna gain and cable loss.
  • Braking Distance Calculator
    Calculate vehicle braking distance from speed, road friction coefficient and gravity. Find how many meters or feet it takes to stop using physics.
  • Monthly Electricity Bill Estimator
    Estimate your monthly electricity bill from kWh usage, your rate per kWh, and any fixed service charge. See monthly and annual cost instantly.
  • Volts, Amps, Watts, Ohms Calculator
    Ohm's law calculator: enter any two of voltage, current, resistance or power and instantly compute the other two using V=IR, P=VI, P=I²R, P=V²/R.
  • Circle Moment of Inertia (Area) Calculator
    Calculate the area moment of inertia of a solid circle from its radius or diameter using I = πr⁴/4 = πd⁴/64. Free engineering tool.
  • Partially Filled Circle Area Calculator
    Calculate the filled cross-section area and fill percentage of a partially filled circle or cylindrical tank from radius and fill depth.
  • Linear Thermal Expansion Calculator
    Calculate linear thermal expansion (ΔL = α·L₀·ΔT) from the expansion coefficient, original length, and temperature change. Free physics tool.
  • Solar Panel System Size Calculator
    Estimate the solar PV system size (kW) and number of panels you need from your daily energy use, peak sun hours, performance ratio and panel wattage.

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