Average down calculator

Your new average price after buying more, and how many shares reach a target average.

Fractional shares (to 0.001)

Purchase 1 — shares

Purchase 1 — price ($)

Purchase 2 — shares

Purchase 2 — price ($)

Current price ($, optional)

Target average ($, optional)

Optional: third purchase, symbol

Purchase 3 — shares

Purchase 3 — price ($)

Stock symbol (optional)

Why is it falling?

Before you buy more, see whether the drop looks temporary or fundamental. Every L.WIN report has a “Cause of the drop” section, with sources.

See why a stock is falling Free account during the beta. Journal, screener and earnings alerts need only a free Finnhub key; AI reports use your own Claude API key (about 700 reports for $5).

What you get with a free L.WIN account

AI news analysis with sourcesStock screenerPortfolio & trading journalEarnings alertsFounder's Trades

Example report — illustration

ACME — Summary

The stock fell 6% this week together with its sector after a peer cut its outlook; no company-specific negative news was found [Reuters]. Earnings are due in 9 days.

Cause of the drop

Sector-wide move, not company-specific — peers fell 4–8% [MarketWatch]
No SEC filing or guidance change from the company

How it is calculated

How the average price is calculated

Average price = total cost ÷ total shares. Example: 10 shares at $100 and 10 shares at $80 → $1,800 ÷ 20 = $90.

Shares needed for a target average = shares × (current average − target) ÷ (target − current price). To bring an average of $100 on 10 shares down to $85 at a price of $80, you need 10 × 15 ÷ 5 = 30 more shares. Buying more of a falling stock increases your risk; this is a calculation, not a recommendation.

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Educational calculator. Results are estimates before taxes and may differ from your broker's figures. Nothing on this page is investment advice.