Shot Speed Calculator

Ball velocity from arm speed and technique.

Arm length (cm)

Shoulder angular velocity (rad/s)

Technique efficiency (0-1)

Release height above water (cm)

Tab to move between fields

Ball speed (m/s)

19.3

Ball speed (km/h)69.5

Ball speed (mph)43.2

Kinetic energy (Joules)79.1

Time to goal from 5m (sec)0.26

Time to goal from 8m (sec)0.42

Save difficulty (0-100)95

Level (1-4)3

How to Use This Calculator

Enter Arm length (cm), Shoulder angular velocity (rad/s), and Technique efficiency (0-1).
Set Release height above water (cm).
Review the Ball speed (m/s) result.
Use Ball speed (km/h) and Ball speed (mph) to inform your decision.

How the result changes with Arm length (cm)

Arm length (cm): Shoulder-to-fingertip length in centimeters. Longer arms generate higher linear velocity.
Shoulder angular velocity (rad/s): Rotational speed of the throwing arm. Elite players reach 40-50 rad/s.
Technique efficiency (0-1): How efficiently rotational energy transfers to the ball. 1.0 = perfect mechanics.
Release height above water (cm): How high above the water the ball is released. Higher = more downward angle.

Ball speed (m/s): Estimated ball velocity at release in meters per second.
Ball speed (km/h): Ball speed converted to kilometers per hour.
Ball speed (mph): Ball speed converted to miles per hour.
Kinetic energy (Joules): Energy of the ball at release (ball mass ≈ 425g).
Time to goal from 5m (sec): Time for the ball to reach the goal from the 5-meter line.
Time to goal from 8m (sec): Time for the ball to reach the goal from 8 meters.
Save difficulty (0-100): How hard this shot is for a goalie to save from 5m (95 = nearly impossible).
Level (1-4): Shot power level: 1 = beginner, 2 = high school, 3 = college, 4 = elite.

Identify Input Parameters
4 parameters
Arm length (cm) = 75, Shoulder angular velocity (rad/s) = 35, Technique efficiency (0-1) = 0.7, Release height above water (cm) = 40 = 4 input(s) provided
Calculate Ball speed
Ball speed = rawVelocity * heightBonus
19.3 = 19.3
Calculate Ball speed
Ball speed = ballSpeedMs * 3.6
69.5 = 69.5
Calculate Ball speed
Ball speed = ballSpeedMs * 2.237
43.2 = 43.2