How to Use Impact Angle Calculator
Enter horizontal velocity and vertical velocity in the same unit system. The calculator uses the ratio of vertical to horizontal speed to return the angle above the horizontal in degrees. Negative vertical velocity still produces a positive impact angle because the direction is represented by the trajectory context.
Formula & Theory - Impact Angle Calculator
The impact angle is the angle whose tangent equals the vertical-to-horizontal speed ratio:
θ = atan(|vertical velocity| / |horizontal velocity|)
angle in degrees = θ × 180 / πThe horizontal component must not be zero because a purely vertical impact would require a limiting case of 90°. The calculator reports the acute angle above the horizontal, which is usually the value needed for projectile sketches, impact diagrams, and simple physics problems.
Use Cases for Impact Angle Calculator
- Physics homework - Convert velocity components into a trajectory angle.
- Projectile analysis - Compare shallow and steep impacts from component speeds.
- Simulation controls - Check whether a chosen velocity pair matches the desired impact angle.
Always enter velocity components from the same instant in the motion; mixing initial and final components will produce a misleading angle.