What this calculator does
Weighted average shares outstanding works out time-weighted share count used as the denominator for EPS. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
The inputs explained
| Field | What to enter |
|---|---|
| Shares outstanding at the start of the year | A number. Starts at 100000. |
| Change in shares, transaction 1 (+ issued, − bought back) | A number. Starts at 12000. |
| Month it took effect (1 = January) | A number. Starts at 4. |
| Change in shares, transaction 2 | A number. Starts at 0. |
| Month it took effect | A number. Starts at 1. |
| Change in shares, transaction 3 | A number. Starts at 0. |
| Month it took effect | A number. Starts at 1. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with shares outstanding at the start of the year
Every other input is held at the calculator’s starting values while shares outstanding at the start of the year varies. Select any row to load that scenario into the calculator.