The average person typically throws a baseball at a speed of around 45-50 miles per hour (72-80 kilometers per hour). This speed can vary widely depending on a number of factors, including age, gender, strength, and experience.
For example, a young child or someone who is new to baseball may only be able to throw a ball at 20-30 miles per hour (32-48 kilometers per hour), while a professional pitcher can throw a ball at speeds upwards of 100 miles per hour (160 kilometers per hour) or more.
It’s also worth noting that throwing a baseball with proper technique and mechanics can greatly improve one’s speed and accuracy. Many baseball players and coaches work on developing proper throwing mechanics in order to maximize their throwing potential and prevent injury.