Physics Calculators
Solve problems in mechanics, circuits, heat, light and quantum physics. Each calculator shows its formula, names the published source, and gives the answer in SI and US customary units.
- By Manoj Meena, M.Sc. Physics
- NIST CODATA constants
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Popular Calculators
The Physics calculators people reach for most - ranked by what's actually used.
Tension CalculatorTension Calculator finds the tension in 1 or 2 ropes holding a load at any angle, in ropes pulling objects and in a string...Car Crash CalculatorCar Crash Calculator finds the impact force on your body in a collision, with or without a seat belt, plus the g-force, stopping time...Ballistic Coefficient CalculatorBallistic Coefficient Calculator finds a G1 or G7 BC from bullet weight, diameter and form factor, or from two velocities, with speed left at...TNT Equivalent CalculatorTNT Equivalent Calculator finds the kg of TNT that fit an explosive by its heat of detonation, with joules, tons, kilotons and megatons at...Blast Radius CalculatorBlast Radius Calculator finds the UN safe distance for an explosive by its weight, for bare, cased or lined-up items, with the site and...Inclined Plane CalculatorInclined Plane Calculator gives the acceleration, forces, final speed and mechanical advantage of a block or a rolling object on a ramp, with friction.Pressure CalculatorPressure Calculator solves P = F/A for pressure, force or area, with results in Pa, kPa, bar, psi and kg/cm2, a water column height...Muzzle Velocity CalculatorMuzzle Velocity Calculator gives bullet speed from its energy and weight, a timed distance or the barrel pressure, and lists muzzle energy and recoil.MOA CalculatorMOA Calculator converts minutes of angle to inches at any range, gives the angle of a group or a miss, and lists the clicks...
Recently Added Calculators
The newest tools added to Physicstool.com, fresh off the bench.
Mirror Equation CalculatorMirror Equation Calculator that solves 1/f = 1/v + 1/u for a concave, convex or plane mirror, and gives its magnification, image type and...Malus Law CalculatorMalus Law Calculator that finds the light a polarizer lets through from I0 cos²θ, solves for the angle or I0, and tracks a stack...Lux to Foot Candles ConverterLux to Foot Candles Converter that turns a light meter reading into fc or lux, tests it against IES room levels, and lists the...Lumen CalculatorLumen Calculator that finds the lumens a room needs, its bulb total, LED watts, its lux or foot-candle level, and the distance a flashlight...Lens Maker Equation CalculatorLens Maker Equation Calculator to find the focal length, power, R1, R2 or index n of a thick or thin lens in air or...Laser Beam Spot Size CalculatorLaser Beam Spot Size Calculator for the 1/e² spot of a focused laser, its depth of focus and its peak intensity, plus the lens...Laser Linewidth and Bandwidth CalculatorLaser Linewidth and Bandwidth Calculator that finds the quantum limit of a laser line, its width in nm or Hz, its coherence length and...Laser Brightness CalculatorLaser Brightness Calculator to find the radiance of a laser, tell which of two lasers looks brighter, and get its irradiance, peak power and...Laser Beam Expander CalculatorLaser Beam Expander Calculator to find the magnifying power, output size and divergence, the lens spacing, and the spot it will leave at a...