Physics

Projectile Motion Simulator

Enter the initial speed, launch angle, starting height, and gravitational acceleration to calculate and chart the trajectory, range, and maximum height of projectile motion (ignoring air resistance). Try gravity on the M...

Uniform Acceleration Calculator (Velocity & Displacement)

Calculate the final velocity and displacement of a uniformly accelerated linear motion from the initial velocity, acceleration, and elapsed time.

Work & Energy Calculator (Work, Kinetic Energy & Potential Energy)

Switch between three formulas to calculate work (W=Fd), kinetic energy (KE=1/2mv²), and potential energy (PE=mgh).

Friction Force Calculator (Static, Kinetic & Inclined Plane)

Calculate friction force from mass or normal force and a coefficient of friction. Also handles inclined planes: whether an object slides and the resulting acceleration.

Momentum & Collision Calculator (Elastic, Inelastic, Restitution Formula) - Free

Free physics tool to calculate 1D collisions between two bodies, showing the momentum and kinetic energy conservation formulas along the way. Supports perfectly elastic, perfectly inelastic, and coefficient-of-restitutio...

Simple Harmonic Motion Calculator (Spring-Mass & Pendulum)

Calculate the period, frequency, and angular frequency of a spring-mass system or a simple pendulum, and visualize how displacement, velocity, and acceleration change over time. Learn the physics of oscillation from spri...

Uniform Circular Motion Calculator (Centripetal Force, Angular Velocity, Period)

Enter mass, radius, and speed (or angular velocity) to calculate the centripetal force, angular velocity, period, and frequency of uniform circular motion (F = mv²/r = mω²r).

Torque (Moment of Force) Calculator — τ = rFsin(θ)

Enter any 3 of force, lever arm length, and angle to instantly solve for the 4th (torque, force, lever arm, or angle) — with automatic N·m to ft·lb unit conversion.

Ohm's Law Calculator (Voltage, Current, Resistance)

Use Ohm's law V=IR to calculate any one of voltage, current, or resistance from the other two values. Power (W) is calculated at the same time.

Resistor Color Code Calculator (Color to Value & Value to Color)

Calculate resistance and tolerance from a resistor's color code (4-band or 5-band). You can also enter a resistance value to find the matching band colors.

Series & Parallel Resistor Calculator (Total Resistance)

Calculate the total resistance of multiple resistors connected in series or parallel. Supports Ω, kΩ, and MΩ units, and lets you freely add or remove resistors.

Ceramic Capacitor Code Converter (Code to Capacitance & Capacitance to Code)

Decode a 3-digit ceramic capacitor code like "104" into pF, nF, and µF instantly, or convert a capacitance back into the standard code. Includes a tolerance letter table.

Free LC Resonant Frequency Calculator | Inductor-Capacitor Circuit

Free calculator for LC resonant circuits made of an inductor (L) and capacitor (C). Solve for frequency, inductance, or capacitance from the other two values, plus characteristic impedance.

Inductor (Coil) Color Code Calculator (Colors → Inductance & Inductance → Colors)

Calculate the inductance and tolerance of a small inductor (coil) from its 3 or 4 color bands, shown in µH, mH, and H. You can also enter an inductance value to look up the matching color bands.

RC Circuit Time Constant Calculator (with Charge/Discharge Graph)

Calculate the time constant τ = R × C of an RC circuit (a resistor R and capacitor C in series). See the charging and discharging curves on a graph, plus the time to reach 63.2% charge and the practical "fully charged" t...

SMD Resistor Code Calculator (3-Digit, 4-Digit & EIA-96)

Convert the numeric marking printed on a surface-mount (SMD) chip resistor into a resistance value. Supports 3-digit codes, 4-digit codes (precision resistors), and EIA-96 codes (2 digits plus a letter), with the format...