Parabolic Velocity Calculator

Model motion, range, and speed with confidence. Choose input mode, then get vectors and angles. Download CSV or PDF for labs, classes, and teams.

Calculator
Pick a mode, then fill only the fields shown.
Typical: 5° to 80°.
Height above ground at launch.
Used in time and distance modes.
Evaluates velocity and position at this time.
Computes t = x / (v0cosθ).
Assumes launch and landing at same height.
Uses ΔH = v02sin²θ / (2g).
Example: 0.1 gives 10 rows per second.
Choose how far the table should run.
Used only when custom end time is selected.

Example Data Table

Sample values for quick testing (no air drag).

v0 (m/s) θ (deg) g (m/s²) y0 (m) t (s) Vx (m/s) Vy (m/s) |v| (m/s) x (m) y (m)
30359.8066502 24.5710.5226.7349.1421.83
20509.811.51.2 12.867.3314.8115.4312.57
45209.8103 42.29-7.2642.91126.876.70
Values are rounded for readability.

Formula Used

  • vx = v0cosθ
  • vy(t) = v0sinθ − g t
  • |v| = √(vx2 + vy2)
  • φ = atan2(vy, vx) (flight-path angle)
  • x(t) = v0cosθ · t
  • y(t) = y0 + v0sinθ · t − ½ g t²
  • tpeak = (v0sinθ)/g
  • ymax = y0 + (v02sin²θ)/(2g)

Range mode uses R = (v02 sin(2θ))/g with equal launch and landing heights.

How to Use

  1. Select a mode like velocity at time, distance, range, or peak height.
  2. Choose units for speed, distance, and gravity.
  3. Enter the angle, gravity, and initial height if needed.
  4. Set trajectory step and the end time option.
  5. Press Calculate and review results above the form.
  6. Export CSV or PDF to include the full table.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.