About the Strikeout Rate Calculator
Strikeout rate (K%) for a pitcher or batter as a percentage of plate appearances.
Also known as: k rate, k% calculator, strikeout percentage.
How to use this calculator
- Enter strikeouts, plate appearances.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Strikeout rate = Strikeouts ÷ Plate appearances × 100
Worked example
Using the values pre-filled in the calculator above:
- Strikeouts = 138
- Plate appearances = 620
the calculator returns:
- Strikeout rate: 22.26%
Working
Strikeout rate = 138 ÷ 620 × 100 = 22.2581%