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

s=Displacement(m)

u=Initial Velocity(m/s)

m/s

v=Final Velocity(m/s)

m/s

a=Acceleration(m/s²)

m/s²

t=Time(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

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).

Choose Your Direction

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

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

Need more physics help?

Check out our physics equation sheet or get personalised tutoring with our AI Genie.

Physics Equations AI Physics Tutor