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Kinematics calculator

Solve uniformly accelerated motion — give any three of v0, v, a, t, s and get the rest.

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Kinematics calculator
A kinematics calculator solves the equations of motion for constant acceleration in a straight line — the "SUVAT" problem set from a physics course. Give it any three of five quantities — initial velocity (v0), final velocity (v), acceleration (a), time (t) and displacement (s) — and it finds the other two using v = v0 + a×t, s = v0×t + ½at² and v² = v0² + 2as. Paste one problem per line, like "v0=0 a=2 t=5", and each line is solved on its own, so a whole worksheet of braking-distance or free-fall problems resolves in one pass.
Values are entered and computed in SI base units, so the algebra stays unambiguous whichever three quantities you know. The speed and distance unit options only change how results are displayed — read a stopping distance in feet or a top speed in mph without re-entering anything. Decimal places set the precision, "Show formula and steps" prints the equation used with the actual numbers plugged in, "Show average velocity" adds (v0 + v) / 2, and table format lays every line out in columns instead of prose.
The progression table option breaks a line's motion into velocity and displacement at a fixed time step, handy for sketching a v-t or s-t graph by hand. A combination with no unique answer — zero time paired with a changing velocity, a negative number under a square root, a solution that would need negative time — is reported as a calm error on that line, and the rest of the input keeps solving.
Everything runs locally in your browser; no problem set or exam question is ever uploaded. Copy the result, download it as a .txt file, or send the output back into the input to keep working on it.
FAQ
Which three quantities can I give it?
Any three of initial velocity (v0), final velocity (v), acceleration (a), time (t) and displacement (s). All ten combinations are supported — the calculator works out which two formulas apply.
What units should I use for the input?
Enter every value in SI base units: meters per second for velocity, meters per second squared for acceleration, seconds for time and meters for displacement. The speed and distance unit options only change how results are displayed, not what you type in.
Why did a line come back as an error instead of a number?
Usually because the three values you gave don't describe one consistent motion — for example a time of zero paired with a velocity that changes, or a combination whose only mathematical solution has a negative time. The message on that line explains which check failed.
Can I solve more than one problem at once?
Yes. Put one problem on each line and every line is solved independently, so a whole list of practice problems resolves together.
Is my input uploaded anywhere?
No. Every calculation runs locally in your browser using JavaScript — nothing you paste in is sent to a server.