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How To Calculate How Fast You Throw A Baseball MPH

How To Calculate How Fast You Throw A Baseball without a Radar Gun

Here’s another math equation related to baseball. If you are looking to find out how fast you can throw in miles per hour (mph) but you don’t have a radar gun (or i-pad app), it’s ok. There is a simple equation that you can use and all you need is a stop watch.

First you will have to measure the distance you are throwing the baseball. Let’s say for example you are throwing off of a standard pitching mound and you are 60 feet 6 inches away from home. Next you will have to time your throw with a stop watch.

Let’s say you throw from the pitcher’s mound to home in .42 of a second. Now, since we have our distance and our time, we can use the equation to find the answer. The equation to find how fast you throw a baseball without using a radar gun is: Distance / Time = Speed Now since we are trying to calculate how fast we throw a baseball, we usually use mph.

Since we want our answer to be in mph we need to convert our distance and time to the relevant measurements. Since we aren’t really releasing the baseball at 60 ft 6 in I’m going to subtract 4.5 feet from our distance (an estimate of where we would release the baseball) Everyone is going to be different here. The most accurate thing would be to measure from the rubber to where you think you are releasing the baseball and subtract that distance from 60.5 ft. So, we will take our distance of 60.5 – 4.5 = 56 feet and convert it to miles. To do this we must take 56 / 5280 (5280 is the amount of feet in a mile). It comes out to 0.0106 miles. Next we have to convert our time into hours. So we are going to take .42 / 60 / 60 (60 seconds in a min and 60 min in an hour) = .000116 hours.

Now that we have our distance and time in the correct measurements, we can now find how fast a baseball is thrown in miles per hour (mph). Using the formula above D/T=S .0106 / .000116 = 91.379 mph So, to calculate how fast you throw a baseball in mph without using a radar gun, this is the formula you should use.

This article was originally brought up because I wrote another article on The Distance from Home to second and there were a few questions on how to translate throw down time from a catcher (or pop time) to mph. So, I’m going to do an example of calculating how fast a catcher can throw down to second base in mph.

We know from the other article that the distance from home to second base on a standard 90 ft baseline field is 127.279 ft. Don’t forget the catcher is going to be moving forward when he throws the ball and the short stop or second baseman will probably catch the ball in front of the base so we have to take some distance off for the equation. Let’s say 5.5 feet will be lost. Now our distance is 127.279 – 5.5 = 121.779 ft. Same for the pop time, we have to take some time off because we only want to calculate the time the baseball is in the air and not all that time that it takes us to stand up, get the ball out of the glove, go through our motion, and then release.

Let’s say for a guy with a pop time of 2.1 seconds, the baseball will be in the air for .94 of a second (an estimate). You would fill in your own numbers by using a stop watch to find out the time the ball left your hand until it hit the short stop’s glove. Now we do our conversions just like above. 121.779 / 5280 = .023 miles .94 / 60 / 60 = .000261 hours .023 / .000261 = 88.12 mph

So there you have it! How to calculate how fast you throw a baseball without a radar gun and only a stop watch.

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