Kinematic Velocity & Motion Calculator
Choose a positive axis. Velocity, acceleration and displacement are signed; displacement is not total distance traveled. No air resistance, variable acceleration or real-world prediction is included.
A QUICK WALKTHROUGH
How to use this tool
- Enter exactly three known values; leave the other two blank. Use m/s, m/s², s and m. Velocities, acceleration and displacement are signed; time must be nonnegative.
- Use the displayed SI units; leave unknown fields blank.
- All finite solutions calculated locally.
Supported equations
The model assumes constant acceleration in one dimension. All ten combinations of three known values are supported; all nonnegative time roots are shown. v = u + at; s = ut + ½at²; s = (u + v)t/2; v² = u² + 2as.
Units and limits
Candidates must satisfy v = u + at and s = ut + ½at² within 10⁻⁹ × max(1, absolute values of the compared sides and terms). Overflow or unreliable precision is rejected. These inputs do not determine a unique finite set of solutions. Supply a different set of three known values.
GOOD TO KNOW
Common questions
Is displacement total distance?
No. It is signed change in position; reversal of direction can make total traveled distance greater.
Does this predict real motion?
No. It is an educational constant-acceleration model, without drag or changing forces.