OPS Calculator

OPS — on-base plus slugging — is the most popular single-number summary of a hitter's offensive value. It adds together two complementary skills: getting on base (on-base percentage) and hitting for power (slugging percentage). One quick number captures both, which is why OPS appears on scoreboards and broadcasts everywhere. This calculator lets you add OBP and SLG directly, or build them up from raw counting stats.

The OPS Formula

Because OBP tops out near 1.000 and SLG can reach 4.000, OPS theoretically ranges up to 5.000, but in practice even the greatest seasons fall around 1.200–1.400.

Worked Example

A hitter posts an OBP of .377 and a SLG of .518:

• Add the two figures: .377 + .518 = .895

An .895 OPS marks a clear middle-of-the-order threat — strong on-base ability paired with real power.

OPS Benchmarks

Understanding OPS+

You will often see OPS+ alongside raw OPS. OPS+ adjusts a hitter's OPS for their home ballpark and the league's run-scoring environment, then scales it so that 100 is exactly league-average. A 130 OPS+ means a hitter was 30% better than average after those adjustments — a far more portable measure across eras and ballparks than the raw number.

The Limits of OPS

OPS weights OBP and SLG equally by simply adding them, even though a point of OBP is worth roughly 1.7 times a point of SLG for scoring runs. Advanced metrics like OPS+ (which adjusts for ballpark and league) and wOBA correct for this. Still, for a fast, intuitive read on a hitter, plain OPS is hard to beat.

Two Ways to Compute It Here

This calculator accepts OPS either as two finished rates (enter OBP and SLG directly) or built from raw counting stats (hits, walks, total bases, at-bats, and so on). The component mode is handy when you have a box score but not the pre-calculated percentages; it computes OBP and SLG for you and sums them.

Note: This calculator is for educational purposes. OPS is a sum of two rounded figures, so it inherits any rounding in the inputs.