Acceleration Calculator

Calculate acceleration from velocity change or from force and mass.

This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.

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How to Use the Acceleration Calculator

This calculator computes acceleration using two common methods from classical mechanics. Pick the one that matches the information you have.

  1. Choose your calculation mode. Select "From Velocity Change" if you know initial and final velocities plus time. Select "From Force and Mass" if you know the applied force and the object's mass.
  2. Enter your values. For velocity mode, provide the initial velocity (u), final velocity (v), and the time interval. For force mode, enter the net force in Newtons and the mass in kilograms.
  3. Read the result. The acceleration appears instantly in meters per second squared. The context line summarizes your inputs.

Use the Share button to send a pre-filled link, or Copy to grab the result.

About Acceleration

Acceleration measures how quickly an object's velocity changes over time. It is a vector quantity, meaning it has both magnitude and direction. When you step on the gas pedal in a car, the car accelerates. When you brake, it decelerates (negative acceleration). The SI unit of acceleration is meters per second squared (m/s2). On Earth, the acceleration due to gravity is approximately 9.81 m/s2. Newton's second law (F=ma) directly links force, mass, and acceleration, making it one of the most fundamental relationships in physics.

Frequently Asked Questions

What is the difference between velocity and acceleration?

Velocity describes how fast an object is moving and in what direction. Acceleration describes how quickly that velocity is changing. An object moving at constant velocity has zero acceleration. An object speeding up, slowing down, or changing direction is accelerating.

Can acceleration be negative?

Yes. Negative acceleration (often called deceleration) means the object is slowing down in the positive direction or speeding up in the negative direction. For example, a car braking from 60 km/h to 0 has negative acceleration.

What is the acceleration due to gravity?

On Earth's surface, the acceleration due to gravity (g) is approximately 9.81 m/s2. This means a freely falling object increases its speed by about 9.81 meters per second every second, ignoring air resistance.