Shares Needed for Target Cost Basis

How many shares to buy at the current price so your blended cost basis hits your target.

Shares held

Cost basis per share ($)

Buy price per share ($)

Target basis per share ($)

Calculating…

Shares needed vs. the buy price. The curve explodes as the buy price approaches the target; the marker shows your price.

Assumption check

The averaging-down (or up) question, answered exactly: name the basis you want, and the tool names the share count. Edge cases handled explicitly.

The Investor Stats Cheat Sheet

A free two-page PDF: expected value, Kelly sizing, Sharpe, sample-size math, and how to read a p-value without fooling yourself. Plus new tools as they ship.