ROBERIN BASEBALL TOOL
OPS Calculator
Calculate OBP, SLG, and OPS from one compact batting line.
Batting line
The hit-type total must not exceed at-bats.
Result
OPS guide
Formula
OPS is a quick offensive index that adds on-base ability and power.
Batting metric guide
Read on-base skill and power together with an accurate OPS
OPS adds on-base percentage (OBP) and slugging percentage (SLG) so you can see how often a hitter reaches base and how many bases they create. Enter at-bats, walks, hit-by-pitch, sacrifice flies, and each hit type to get OPS, OBP, SLG, AVG, hits, and total bases in one flow.
What the OPS calculator can check
OPS, OBP, and SLG together
One batting line returns OPS, on-base percentage, and slugging percentage for a quick view of offensive production.
Total bases by hit type
Singles, doubles, triples, and home runs are entered separately, so total bases and slugging follow the scorebook.
OBP denominator check
The result panel shows how walks, hit-by-pitch, and sacrifice flies affect the OBP denominator.
Example and copy
Load the sample line, review the calculation, and copy the result text into notes, recaps, or team sheets.
How to use it
- Enter at-bats — Start with official AB, the base denominator for slugging and batting average.
- Enter on-base events — Add BB, HBP, and SF so the OBP numerator and denominator match the record.
- Enter hit types — Fill in singles, doubles, triples, and home runs; hits and total bases are summed automatically.
- Review the result — Check OPS, OBP, SLG, AVG, hits, total bases, and the OBP denominator together.
- Copy when needed — Copy the result sentence into a team record, game recap, or personal note.
Formula and example
The calculator first sums hits and total bases by hit type, then computes OBP and SLG separately before adding them for OPS. Display values are rounded to three decimal places.
1B + 2B + 3B + HR1B + 2×2B + 3×3B + 4×HR(H + BB + HBP) ÷ (AB + BB + HBP + SF)OBP + (TB ÷ AB)Useful situations
Post-game stat cleanup
Use a scorebook line to calculate OPS and supporting stats before updating a sheet or recap.
Player comparison
Look beyond batting average by checking on-base value and power contribution side by side.
Sample-line review
The sample is AB 502, BB 61, HBP 4, SF 6, 1B 95, 2B 35, 3B 3, HR 28, which returns OPS 0.964.
Cautions for interpretation
Check the source record first
- OPS is a summary of OBP and SLG. League, park, season context, position, and sample size still matter.
- Use your official score source for special cases such as sacrifice bunts, catcher interference, or league-specific scoring rules.
- If AB is 0, SLG and OPS cannot be calculated. If the OBP denominator is 0, the calculator shows an error message.
- Three-decimal output is rounded for display. Compare source data and rounding rules when matching other sites.
FAQ
What formula does the calculator use?
OPS is OBP plus SLG. This tool uses OBP = (H + BB + HBP) ÷ (AB + BB + HBP + SF) and SLG = TB ÷ AB.
What if I do not know the singles count?
Singles equal total hits minus doubles, triples, and home runs. Calculate singles first if your source only lists total hits.
Why enter sacrifice flies?
Sacrifice flies are part of the common OBP denominator. Enter SF from the scorebook to keep OBP and OPS accurate.
Which inputs produce the OPS 0.964 sample?
AB 502, BB 61, HBP 4, SF 6, 1B 95, 2B 35, 3B 3, HR 28 return OBP 0.394, SLG 0.570, and OPS 0.964.