Calculadora SUVAT
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
v = u+at; s = ut+½at²
About this calculator
The SUVAT Calculator solves equations of uniformly accelerated motion (UAM) in physics. It uses the three main formulas: v = u + at, s = ut + ½at² and v² = u² + 2as, where s is displacement, u is initial velocity, v is final velocity, a is acceleration, and t is time. With only three known values, the calculator finds the remaining two unknowns, simplifying kinematics problems.
It works by inputting any three quantities (s, u, v, a, t). The system checks which combinations are possible and applies the correct equations. For example, if you provide u, a and t, it calculates v and s. If you provide u, v and a, it calculates s and t. The calculator also handles cases where acceleration is zero (uniform motion) or negative (deceleration).
Use this tool in situations such as calculating the braking distance of a car (given initial and final velocity and deceleration), determining the fall time of an object (given height and gravity acceleration), or solving vertical launch problems. It is useful for physics students, engineers, and professionals who need quick answers without manually solving systems of equations.
Important precautions: ensure units are consistent (meters, seconds, m/s, m/s²). The calculator assumes constant acceleration; it does not work for variable acceleration. Remember that displacement s is vectorial, in vertical motions, use positive signs upward and negative downward. Results may be negative, indicating opposite direction to the adopted one.
Frequently asked questions
What values do I need to input to use the calculator?
You must provide exactly three of the five values (s, u, v, a, t). The calculator automatically determines the remaining two.
Can I use different units, like km/h and hours?
No, all units must be consistent: meters for distance, seconds for time, m/s for velocity, and m/s² for acceleration. Convert before using.
What happens if I enter values that do not correspond to real motion?
The calculator checks physical consistency. For example, if v² - u² is negative with positive a, it may indicate an error. Impossible results generate an error message.
Does the calculator work for motion with negative acceleration?
Yes, just enter a negative value for acceleration. The calculator handles deceleration normally.
How do I interpret negative results for displacement or velocity?
Negative values indicate opposite direction to the positive convention. For example, in free fall, if you take upward as positive, displacement will be negative.