Physics Calculators

Free calculators for force, kinematics, Ohm's law, projectile motion, and work-energy-power. All equations shown with SI units.

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Force Calculator
Calculate force, mass, or acceleration using Newton's second law (F = ma). Solve for any one variable when the other two are known. Free, no signup.
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Kinematic Equations Calculator
Solve SUVAT kinematic equations for displacement, velocity, acceleration, and time. Enter any three known values to find the missing fourth. Free.
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Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to solve for the remaining unknowns instantly. Free.
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Projectile Motion Calculator
Calculate projectile range, maximum height, time of flight, and final velocity for any launch angle and initial speed. Shows full trajectory. Free.
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Work, Energy & Power Calculator
Calculate mechanical work, kinetic energy, potential energy, and power. Solve for any variable using W=Fd, KE=½mv², PE=mgh, and P=W/t. Free.

Physics Calculators - Classical Mechanics and Electromagnetism, Solved

Physics calculators translate the fundamental laws of nature into numerical answers. Every calculator here applies the correct equation, shows all variable definitions with SI units, and walks through a worked example. Used by Class 9–12 students, JEE/NEET aspirants, and undergraduate physics students.

Five Physics Calculators

Force Calculator - Newton’s second law: F = ma. Enter any two of force (N), mass (kg), and acceleration (m/s²) to find the third. Also includes weight (W = mg, g = 9.81 m/s²). The gateway into all mechanics problems - combine with the Work Energy Power Calculator for energy calculations.

Kinematics Calculator - All five SUVAT equations simultaneously. Enter any three of: displacement (s), initial velocity (u), final velocity (v), acceleration (a), time (t) - and get the other two. Handles deceleration and free-fall (a = −9.81 m/s²). Closely linked to the Projectile Motion Calculator for 2D applications.

Ohm’s Law Calculator - Four modes: find voltage (V = IR), current (I = V/R), resistance (R = V/I), and power (P = IV = I²R = V²/R). All four values returned from any two inputs. For electronics and circuit design, pair with the Voltage Divider Calculator.

Projectile Motion Calculator - Two-dimensional projectile motion (no air resistance): max height (H = u²sin²θ/2g), range (R = u²sin2θ/g), time of flight (T = 2u·sinθ/g), and velocity at any time t. Underlying equations are quadratic - see the Quadratic Equation Solver for the math.

Work, Energy & Power Calculator - Work (W = Fd·cosθ), Kinetic Energy (KE = ½mv²), Potential Energy (PE = mgh), and Power (P = W/t = Fv). Enter the known values to find work done, energy transferred, or power output.

Frequently Asked Questions

What does SUVAT stand for?

s = displacement, u = initial velocity, v = final velocity, a = acceleration, t = time. The Kinematics Calculator uses all five equations of motion to solve for any two unknowns given three known values.

Does the projectile motion calculator account for air resistance?

No - the Projectile Motion Calculator uses the ideal model (no drag, constant g = 9.81 m/s²). This is the standard physics curriculum model. Real-world trajectories at high speeds or long ranges will differ.

What is the difference between work and power?

Work (joules) is total energy transferred: W = F × d. Power (watts) is the rate: P = W/t. A motor lifting 100 kg by 10 m does 9,810 J of work regardless of speed. If done in 10 s, power = 981 W; in 5 s, power = 1,962 W. Calculate both with the Work Energy Power Calculator.

Can the Ohm's law calculator handle AC circuits?

The Ohm's Law Calculator applies V = IR for DC resistive circuits. For AC circuits with reactance, impedance Z replaces R. For electronics circuit design, also see the Voltage Divider and Transformer Ratio calculators.