From YAHOO! Answers. Q: How do I convert outfield fence height to equal a greater distance? I am trying to have college games played at our baseball facilities but the outfield fence is only 355ft in distance. I am trying to find out how much fence height equals field distance. (5 ft of fence height equals ? ft of field distance) Best Answer efqy answered 5 years ago If the ball comes down at a 45 degree angle (as it will for maximum distance hits), then approximately an extra 5 ft of distance. If the hit is flatter than 45 degrees, then it corresponds to a bigger distance than 5ft.