Physics Tool

SUVAT CalculatorSolve kinematic equations with step-by-step working

Enter any 3 known SUVAT variables and instantly calculate the unknowns. Perfect for GCSE and A-Level Physics revision.

Try an example:

Enter Known Values

0/3 values entered
m
m/s
m/s
m/s²
s

How to use:

Enter exactly 3 known values and the calculator will find the remaining 2 unknowns with full working shown.

Enter 3 values to calculate

Fill in any 3 known SUVAT values to see the solution with full working.

The 5 SUVAT Equations

1Missing: s
v = u + at

Relates velocity and time

2Missing: v
s = ut + ½at²

Displacement without final velocity

3Missing: u
s = vt - ½at²

Displacement without initial velocity

4Missing: t
v² = u² + 2as

Relates velocities and displacement

5Missing: a
s = ½(u + v)t

Average velocity method

Variable Key

s=Displacement (m)
u=Initial Velocity (m/s)
v=Final Velocity (m/s)
a=Acceleration (m/s²)
t=Time (s)

When Can You Use SUVAT?

You CAN Use SUVAT When:

  • •Acceleration is constant (uniform acceleration)
  • •Objects in free fall (a = g = 9.8 m/s²)
  • •Vehicles braking with constant force
  • •Objects on inclined planes (friction ignored)
  • •Motion in one dimension (straight line)

You CANNOT Use SUVAT When:

  • •Acceleration changes (e.g., air resistance)
  • •Circular motion (centripetal acceleration)
  • •Simple harmonic motion (oscillations)
  • •Terminal velocity scenarios
  • •Projectile motion (need to split into components)

SUVAT Problem-Solving Tips

1

List What You Know

Write down all the SUVAT values given in the question. Include starting from rest (u = 0) or coming to a stop (v = 0).

2

Choose Your Direction

Decide which direction is positive. Usually upward or forward is positive. Deceleration means negative acceleration.

3

Check Your Units

Convert all values to SI units before calculating. Divide km/h by 3.6 to get m/s. Time must be in seconds.

Frequently Asked Questions

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