Formula and method
OBP = (H + BB + HBP) ÷ (AB + BB + HBP + SF). SLG = TB ÷ AB. OPS = full-precision OBP + full-precision SLG.
Worked example
With 50 hits, 88 total bases, 200 AB, 20 BB, 5 HBP, and 5 SF: OBP = 75 ÷ 230 ≈ .326; SLG = 88 ÷ 200 = .440; OPS ≈ .766.
What the result means
OPS combines the rate of reaching base with total bases per at-bat. The two component rates use different denominators.
Common input mistakes
- Adding displayed rounded OBP and SLG instead of the full-precision values.
- Treating sacrifice bunts as sacrifice flies.
- Including walks in official at-bats.
Scope and limitations
OPS is not OPS+, WAR, wRC+, or a context-adjusted offensive metric. It omits other aspects of offensive value.
This is a deterministic calculation aid, not a player evaluation, prediction, fantasy recommendation, or betting tool. No live statistics are fetched.
Privacy
Entered statistics are calculated in this browser tab. This tool has no account, input submission, URL state, or persistent storage for your entries.