Statistical
Baseball OPS (On-Base Plus Slugging), OBP, SLG & Isolated Power (ISO)
Calculate Major League Baseball On-Base Percentage (H + BB + HBP) / (AB + BB + HBP + SF), Total Bases shortcut H + 2B + 2*3B + 3*HR, Slugging, OPS, and Isolated Power.
Combine reaching base and extra-base hitting
OBP uses hits, walks and hit-by-pitch in its numerator, and at-bats plus walks, hit-by-pitch and sacrifice flies in its denominator. SLG uses total bases divided by at-bats. OPS adds these two different rates; it is not itself a probability.
The total-bases shortcut H + 2B + 2×3B + 3×HR counts one base for every hit, then adds the extra bases for doubles, triples and home runs. ISO removes singles from the per-at-bat total. Use consistent counts from the same player and reporting period.
This example checks nonnegative integer counts, hits no greater than at-bats and extra-base hits no greater than total hits. It does not infer awards or current league averages from a fixed OPS threshold. With zero at-bats, AVG, SLG, OPS and ISO return N/A; OBP remains defined if its own denominator is positive.
| Sabermetric Hitting Stat | Formula | 500 AB, 150 H, 35 2B, 5 3B, 30 HR, 75 BB, 5 HBP, 10 SF |
|---|---|---|
| Batting Average (AVG) | B3 / B2 | .300 (0.300) |
| On-Base Percentage (OBP) | (B3+B7+B8) / (B2+B7+B8+B9) | 230 / 590 = .390 (0.390) |
| Slugging Percentage (SLG) | (B3 + B4 + 2*B5 + 3*B6) / B2 | 285 / 500 = .570 (0.570) |
| On-Base Plus Slugging (OPS) | OBP + SLG | ISO = SLG - AVG | OPS = .960 | ISO = .270 |
Official On-Base Plus Slugging (OPS = OBP + SLG)
Add the unrounded component ratios, then round the final display to three decimals.
=IF(COUNT(B2:B9)<>8,"Invalid inputs",IF(OR(MIN(B2:B9)<0,B2<>INT(B2),B3<>INT(B3),B4<>INT(B4),B5<>INT(B5),B6<>INT(B6),B7<>INT(B7),B8<>INT(B8),B9<>INT(B9),B3>B2,SUM(B4:B6)>B3),"Invalid inputs",IF(B2=0,"N/A",ROUND(((B3 + B7 + B8) / (B2 + B7 + B8 + B9)) + ((B3 + B4 + 2 * B5 + 3 * B6) / B2), 3))))Isolated Power (ISO = SLG - AVG)
Measures extra bases per at-bat purely from doubles, triples, and home runs.
=IF(COUNT(B2:B9)<>8,"Invalid inputs",IF(OR(MIN(B2:B9)<0,B2<>INT(B2),B3<>INT(B3),B4<>INT(B4),B5<>INT(B5),B6<>INT(B6),B7<>INT(B7),B8<>INT(B8),B9<>INT(B9),B3>B2,SUM(B4:B6)>B3),"Invalid inputs",IF(B2=0,"N/A",ROUND((B4 + 2 * B5 + 3 * B6) / B2, 3))))On-base percentage (OBP)
The denominator is checked before division; display rounding does not change the input counts.
=IF(COUNT(B2:B9)<>8,"Invalid inputs",IF(OR(MIN(B2:B9)<0,B2<>INT(B2),B3<>INT(B3),B4<>INT(B4),B5<>INT(B5),B6<>INT(B6),B7<>INT(B7),B8<>INT(B8),B9<>INT(B9),B3>B2,SUM(B4:B6)>B3),"Invalid inputs",IF(SUM(B2,B7:B9)=0,"N/A",ROUND((B3 + B7 + B8) / (B2 + B7 + B8 + B9), 3))))Slugging percentage (SLG)
The denominator is checked before division; display rounding does not change the input counts.
=IF(COUNT(B2:B9)<>8,"Invalid inputs",IF(OR(MIN(B2:B9)<0,B2<>INT(B2),B3<>INT(B3),B4<>INT(B4),B5<>INT(B5),B6<>INT(B6),B7<>INT(B7),B8<>INT(B8),B9<>INT(B9),B3>B2,SUM(B4:B6)>B3),"Invalid inputs",IF(B2=0,"N/A",ROUND((B3 + B4 + 2 * B5 + 3 * B6) / B2, 3))))Batting average (AVG)
The denominator is checked before division; display rounding does not change the input counts.
=IF(COUNT(B2:B9)<>8,"Invalid inputs",IF(OR(MIN(B2:B9)<0,B2<>INT(B2),B3<>INT(B3),B4<>INT(B4),B5<>INT(B5),B6<>INT(B6),B7<>INT(B7),B8<>INT(B8),B9<>INT(B9),B3>B2,SUM(B4:B6)>B3),"Invalid inputs",IF(B2=0,"N/A",ROUND(B3/B2,3))))Try the example
Use the original values or change them to test your understanding.