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Force Unit Conversion CalculatorConvert force between dyne, newton, kilogram-force, pound-force, ton-force and poundal instantly. Universal physics tool using exact SI/CGS/imperial constants.
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Projectile from Launch Speed and Flight TimeCompute launch angle, maximum height, and horizontal range of a projectile from its initial speed and total flight time (no air resistance).
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Projectile Motion from Angle and Range CalculatorFind the initial speed, time of flight, and peak height needed to reach a target range at a given launch angle. Ideal (no air resistance) projectile model.
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Projectile Motion with Height Difference (Target Height & Distance)Compute the minimum-speed projectile launch parameters (initial speed, angle, flight time) to hit a target at a given height h and horizontal distance l. No air resistance.
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Engine Horsepower CalculatorCalculate engine horsepower from torque (lb-ft) and RPM using HP = (Torque × RPM) / 5252. Fast, accurate, and free for any engine.
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Projectile Motion with Launch Height (Speed & Angle)Compute time of flight, maximum height, and horizontal range for a projectile launched from a height above (or below) the landing plane, given speed and angle.
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Free Fall Distance and Velocity from Time CalculatorCompute free-fall distance and velocity after a given time for an object dropped from rest in a vacuum. Adjustable gravity for Moon, Mars or any body.
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Projectile Motion Calculator (from Launch Angle and Apex Height)Compute the initial launch speed, time of flight, and horizontal range of a projectile from its launch angle and maximum (apex) height. No air resistance.
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Projectile Motion from Peak Height and Range CalculatorFind the launch speed, launch angle and flight time of a projectile from its peak height and horizontal range, with no air resistance and level ground.
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Free Fall CalculatorFree fall calculator: enter a fall distance and gravity to find the elapsed time and impact speed (m/s and km/h). Assumes vacuum, no air resistance.
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Projectile Motion Calculator (from Initial Velocity and Launch Angle)Compute flight time, maximum height, and horizontal range of a projectile from its initial velocity and launch angle, ignoring air resistance.
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Free Fall Calculator: Time and Distance from VelocityCompute free-fall elapsed time and fall distance needed for an object dropped from rest to reach a target speed. Supports m/s, km/h and custom gravity.
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Travelers' Meeting Time CalculatorFind how long until two people walking toward each other meet. Enter distance and both speeds in m, km, m/min, m/s, km/h and more. Free and instant.
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Pendulum Period (Exact vs Small-Angle) Table CalculatorCompute a simple pendulum's exact period via the complete elliptic integral (AGM) and compare it to the small-angle approximation T0 = 2pi*sqrt(l/g) across amplitudes.
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Pendulum Period Calculator (Exact, Large-Amplitude)Compute the exact period of a simple pendulum at any release amplitude using the complete elliptic integral of the first kind (AGM method), not the small-angle formula.
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Free Fall with Air Resistance Calculator (from Time)Compute fall distance and speed of an object falling from rest with quadratic air resistance after a given time. Uses the tanh/ln-cosh closed-form solution.
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Uniform Acceleration Calculator (Time to Reach a Target Velocity)Find how long an object under constant acceleration takes to reach a target velocity, plus the distance traveled. Universal kinematics, multiple units.
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Uniform Motion Speed CalculatorCalculate uniform-motion speed from distance and time. Enter hours, minutes, seconds and a distance in km or m to get m/s, m/min and km/h instantly.
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Uniform Velocity Motion Distance CalculatorCompute travel distance from constant speed and elapsed time with d = v × t. Enter speed in km/h, m/min or m/s plus hours, minutes and seconds.
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Damped Oscillation Displacement CalculatorCompute the displacement x(t) of a damped harmonic oscillator over 4 natural periods. Detects under-, critically, and over-damped regimes with a full data table.
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Uniform Acceleration Calculator (from Initial & Final Velocity over Time)Compute constant acceleration and distance from initial velocity v0, final velocity v and elapsed time t. Get a in m/s^2, km/h per s, and g, plus distance.
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Doppler Effect (Sound) Frequency CalculatorCalculate the frequency a moving or stationary observer hears from a moving sound source using the acoustic Doppler effect and speed of sound in air.
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Lorentz Length Contraction CalculatorCalculate relativistic length contraction with the Lorentz formula L = L0 x sqrt(1 - v^2/c^2). Enter rest length and velocity to get the observed length.
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Round-Trip Average Speed CalculatorCalculate the true average speed of a round trip over equal distances at two speeds. Uses the harmonic mean 2·v1·v2/(v1+v2), not the arithmetic mean.
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