When to use this calculator
Find constant average acceleration from a change in velocity. Negative acceleration is relative to the chosen positive direction.
Explore the motion & kinematics calculators for other questions in this topic. For a related calculation, use the Angular Acceleration Calculator: Find angular acceleration from a change in angular velocity.
PUTTING IT INTO PRACTICE
Acceleration: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Initial velocity (m/s) | 0 |
| Final velocity (m/s) | 20 |
| Time (s) | 5 |
| Result | 4 m/s² |
- Check the input labels and enter the example values above.
- Apply the relationship: Acceleration = (final velocity − initial velocity) ÷ time.
- The result is 4 m/s², rounded for display.
How to interpret your result
Negative acceleration is relative to the chosen positive direction.
Choose a reference direction before using signed velocities. Constant-acceleration models do not capture variable braking or drag. Projectile tools explicitly state launch and landing assumptions.
Frequently asked questions
Are displacement and distance interchangeable?
No. Displacement is the signed or directed change in position; distance counts the length of the path travelled.
How do I use the acceleration calculator?
Enter initial velocity (m/s), final velocity (m/s), time (s). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Acceleration = (final velocity − initial velocity) ÷ time.
What should I check before using the result?
Negative acceleration is relative to the chosen positive direction.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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