ThinkVault ToolsDCA / Dilution Calculator

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DCA / Dilution Calculator

Presets

Board lots vary by security; verify the actual lot. 1 means whole shares; no ticker-based guess is made.

Results

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DCA · Custom

10/27/2026
$10,020

Capital needed · 167 current shares held

New average price$74.98−25.02%
Current average cost$100.00
New average price$74.98
Target average price$75.00

Capital needed

$10,020

Method and common questions

Tax, lending, holiday and protection rules vary by place and date. Check current local rules and provider terms. Results are estimates.

How is stock averaging down (DCA) calculated?

Averaging down lowers your average cost per share by purchasing additional shares at a lower market price. The basic formula is New Average Cost = (Existing Cost Basis + New Capital Added) ÷ (Existing Shares + New Shares Bought). This tool works in reverse to find the exact share count and capital needed to reach a target average price.

Example: averaging 100 shares from $100 down to $75

Suppose you hold 100 shares at an average cost of $100 ($10,000 invested) and the stock trades at $60. To bring your average cost down to $75, you need to buy 167 shares at $60 (adding $10,020), bringing your total position to 267 shares at an average cost of about $75.

Method

Target-average formula: Shares to buy = Existing shares × (Current average − Target average) ÷ (Target average − Current price), rounded up to whole shares. Board lots vary by security; verify the actual lot. 1 means whole shares; no ticker-based guess is made.

FAQ

Why does the calculator say the target average is impossible?
If the current market price is equal to or above your target average cost, buying more shares cannot lower your average to that target. Raise the target average or wait for a lower entry price.
Are brokerage fees and taxes included in the figure?
No. The tool uses pure price-and-share math for quick budgeting; add your broker's commission, exchange fees and stamp duty when placing orders.
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