Kinematics calculator

Constant-acceleration motion — enter any three of u, v, a, t, s and solve for the other two.

Enter any three of the five quantities — leave the two you want solved empty.

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Constant-acceleration motion only (v = u + at, s = ut + ½at², v² = u² + 2as). Exactly three fields must be filled; time must be ≥ 0; magnitudes up to 10¹². Where a square root has two valid signs, the solution with non-negative time is preferred; when no root gives t ≥ 0 the tool reports no solution. Vertical setups need g folded into a yourself.

How to use

  1. Fill exactly three of the five fields.
  2. Leave the two unknowns empty.
  3. Read the solved values.

What it supports

v = u + at, s = ut + ½at², v² = u² + 2as only — constant acceleration. Time must be ≥ 0; magnitudes up to 10¹². Where a root has two signs, the non-negative-time solution is preferred; when no root gives t ≥ 0 the tool reports no solution. Fold g into a yourself for vertical problems.

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