Updated · Methodology: named formula library
MLB OPS Calculator
On-base % + slugging % = OPS, the most important offensive baseball stat.
OBP to SLG = 0.35:0.45 (1 as decimal).
OPS
OPS = OBP + SLG. League avg ~0.730. Elite: 1.000+. OPS+ normalizes to league + ballpark — 100 = avg, 150 = 50% above avg.
Worked Example
0.35 OBP to 0.45 SLG
- a
- 0.35
- b
- 0.45
- Result
- 0.35:0.45 (0.78)
0.35 / 0.45 = 0.78. Simplified: 0.35:0.45.
When to Use This Calculator
- Compare MLB hitters
Limitations & Common Mistakes
- Results are estimates from your inputs.
- Verify with current data for major decisions.
Frequently Asked Questions
How is the MLB OPS Calculator computed?
OBP divided by SLG, plus a simplified ratio (e.g., 4:3) using greatest common divisor. Both decimal and ratio forms are useful in different contexts: decimal for math, ratio form for comparisons or recipe scaling.
What does OBP:SLG mean?
It's a comparison: for every SLG unit, you have a corresponding amount of OBP. Useful when the absolute numbers matter less than the proportion (e.g., reading 8:1 LTV/CAC immediately tells you the unit economics are healthy without needing the dollar amounts).
Why simplify the ratio?
4:3 is more readable than 200:150. The simplified form (using greatest common divisor) preserves the proportion while making it easier to interpret. Common simplified ratios: 16:9 (widescreen), 4:3 (legacy displays), 3:1 (LTV:CAC for SaaS).
When is a ratio more useful than the absolute values?
Comparison across scales. A $1B company and a $1M company can both have a 3:1 LTV:CAC; the ratio reveals comparable unit economics regardless of scale. Use ratios for benchmarking; use absolute numbers for budgeting.