Free coach tools
Free sports calculators, with the formula shown
The numbers players and parents ask coaches about, worked out in your browser. Every answer shows its formula and your numbers, and nothing you type is stored.
Baseball and softball stats
The six numbers every hitting and pitching lesson ends up talking about, with the formula shown on every line.
- Example 3.52 3 earned runs in 7.2 innings, scaled to 9 innings ERA calculator Work out earned run average from earned runs and innings pitched, including partial innings, for 9-inning baseball or 7-inning softball games.
- Example .307 42 hits in 137 at-bats Batting average calculator Divide hits by at-bats and see the average the way a box score writes it, plus what one more hit or one more out would do to it.
- Example .394 On base 63 times in 160 plate appearances that count On-base percentage calculator Calculate on-base percentage from hits, walks, hit by pitch, at-bats, and sacrifice flies, with the formula and your numbers shown on every line.
- Example .496 68 total bases in 137 at-bats Slugging percentage calculator Turn hits, doubles, triples, and home runs into total bases and slugging percentage, with every step of the arithmetic shown.
- Example .890 OBP .394 + SLG .496 OPS calculator Enter one stat line and get on-base percentage, slugging percentage, and OPS together, with the formula behind each number.
- Example 1.34 65 base runners from walks and hits in 48.1 innings WHIP calculator Calculate walks plus hits per inning pitched, including partial innings, with the formula and your numbers shown.
Youth pitching rules
Pitch limits and days of rest by league age, so nobody has to dig through a rulebook at the field.
Golf handicaps
World Handicap System math for an index from your rounds and the strokes you get on a given set of tees.
- Example 15.7 Lowest 2 of 8 score differentials Golf handicap calculator Paste your recent scores with course and slope ratings to estimate a World Handicap System Handicap Index, with every differential shown.
- Example 16 strokes Index 14.3 on a 131 slope, 71.4 rating, par 72 Course handicap calculator Turn a Handicap Index into strokes for the tees you are playing, from slope rating, course rating, and par, with an optional handicap allowance.
Youth soccer
Birth year to age group to ball size, for the season you pick.
Gear sizing
Bat length and racquet grip from a player's own measurements, read off the maker's published chart.
- Example 30 inches 4'6", 75 lbs. By age alone: 28" - 29" Bat size calculator Enter height and weight to read the recommended baseball bat length off the Rawlings sizing chart, with the by-age range as a cross-check.
- Example Size 3 (4 3/8") Closest size to a 4.375 in measurement Tennis grip size calculator Measure from your palm crease to your index fingertip and get your tennis racquet grip size, sizes 1 to 5, from the HEAD grip chart.
Courts and space
Regulation dimensions and how many courts a space really holds.
Coaching business
For the coach's own numbers.
Bring the messy coaching rules.
Elite Coach Booking turns those rules into a booking flow clients can use and a coach app you can run from.