Baseball Field Dimensions: Ultimate Guide (2018)

This guide gives you baseball field dimensions for each league and guides you on how to set up your field. You need to know the dimensions of a baseball field to play by the rules.  You need to measure it out in accordance with the NFHS guidelines.  What sets the game of baseball fields apart are the different leagues.

Baseball Field Dimensions

NFHS.ORG

Each league has different measurements for baseline, home plate, infield arc radius, foul lines, and center field fence.

But don’t worry we will go over each measurement and how to use it on the field to make sure you get your field set up right.

There is a field diagram to the right. you can enlarge and a link here to get a better look.  This will give you a better visual as we go over the field dimensions.

 

Lets start with a list of the main dimensions for each baseball league:

Pinto Baseball Field Dimensions

  • Baseline — 60 feet
  • Home plate to second base —70 feet 8 1/2 inches
  • Home plate to front of pitching rubber —38 feet
  • Infield arc radius — 50 feet
  • Home plate to backstop — 20 feet
  • Foul lines — 125 feet to fence
  • Center field fence — 175 feet
  • Pitching Mound Diameter 10′
  • Pitching Mound Height 6″

Little League Baseball Field Dimensions

  • Baseline — 60 feet
  • Home plate to second base — 84 feet 10 ¼ inches
  • Home plate to front of pitching rubber — 46 feet
  • Infield arc radius — 50 feet
  • Home plate to backstop — 25 feet
  • Foul lines — 200 feet minimum to outfield fence
  • Center field fence — 275 feet
  • Pitching Mound Diameter 10′
  • Pitching Mound Height 6″

Bronco Baseball Field Dimensions

  • Baseline — 70 feet
  • Home plate to second base — 99 feet
  • Home plate to front of pitching rubber — 50 feet
  • Infield arc radius — 65 feet
  • Home plate to backstop — 30 feet
  • Foul lines — 225 feet to outfield fence
  • Center field fence— 275 feet
  • Pitching Mound Diameter 12′
  • Pitching Mound Height 6″

Pony Baseball Field Dimensions

  • Baseline — 80 feet
  • Home plate to second base — 113 feet 2 inches
  • Home plate to front of pitching rubber — 54 feet
  • Infield arc radius — 80 feet
  • Home plate to backstop — 40 feet
  • Foul lines — 265 feet to outfield fence
  • Center field fence— 275 feet
  • Pitching Mound Diameter 15′
  • Pitching Mound Height 8″

High School, College, and Pro Baseball Field Dimensions

  • Baseline — 90 feet
  • Home plate to second base — 127 feet 3 3/8 inches
  • Home plate to front of pitching rubber — 60 feet 6 inches
  • Infield arc radius — 95 feet
  • Home plate to backstop — 60 feet
  • Foul lines — 325 feet minimum to outfield fence
  • Center field fence— 400-plus feet
  • Pitching Mound Diameter 18′
  • Pitching Mound Height 10″

 

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Now let’s make some sense of how to measure out your field with these baseball field dimensions:

Placing Home Plate:

In this description we will call the back tip of home plate the apex, to make it easier to read.  If you have a back stop we will need to do some measuring.  If you do not just place home plate in an approximate spot.

First: -If you have a backstop: start from one outside corner of the backstop and run a string out to a couple of feet past where you think the pitching rubber will be. Use field paint or chalk to make an an arc. Repeat this process starting from the second post, making sure the second string  is the same length as the first.  Your arcs should intersect.

Second:– Use a measuring tape to locate the center of the backstop. Extend a straight line from the center out to where the arcs intersect. Position the apex of home plate on this line and 25′ to 60′ from the backstop depending on the league you are setting up the field for.  Having this room gives the catcher and officials room to do their job.

Finding Second Base:

Run a string from the center point on the backstop, through the apex and over pitcher’s mound to place second base on center. The distance to measure is from the apex of home plate to the center of second base the distance to measure is  70 feet 8 1/2 inches to 127 feet 3 3/8 inches.

Finding First Base:

Now that Second base and Home plate are in, you will use them to find first and third base.  Use a string from the apex of home plate and measure 60′ to 90′ to where first base should be, make an arc with chalk.  Then measure 60′ to 90′ from the center of second base to where first should be and create another arc.  Where the 2 arcs intersect is where you will place the back right corner of first base.

Finding Third Base:

Use a string from the apex of home plate and measure 60′ to 90′ to where third base should be, make an arc with chalk.  Then measure 60′ to 90′ from the center of second base to where third should be and create another arc.  Where the 2 arcs intersect is where you will place the back left corner of third base.

Placing the baseball Pitching Rubber:

Following the straight line from the apex to the center of second base, measure a 38′ to 60′ 6″ line from the apex to the spot where the front of the pitching rubber will be. Easily square up the pitching rubber by measuring an equal distance from the front corners of home plate to the corresponding corners on the pitching rubber.

Notes on Pitching Mound Height and Diameter:

Here is  an example of how a high school mound should be set up.  The baseball mound is 18 feet in diameter and 10 inches higher than home plate. The pitching rubber is 18 inches back from the center of the mound. The flat area on top of the mound is 5 feet by 34 inches. The 6 inches in front of the pitching rubber is flat, and then begins to grade down one inch per foot.  Each league will have a similar set up but with their own dimensions as noted above.

Baseball field dimensions are pretty straight forward.  The diagram above also provides details for foul pole and batters boxes.  When setting up your field it is best to use the right equipment.  You can check out the fencing, field covers, measuring, and field maintenance equipment at our facility section on morleyathletic.com.

JWM