Any Help Me

Stock Average Calculator — Calculate Your Average Cost Basis

#1
$
#2
$
Price per shareNumber of shares
Average Cost Per Share
$41.00
Total Shares
250
Total Invested
$10,250
Avg Price
$41.00

Purchase Breakdown

#PriceSharesCost
1$50.00100$5,000
2$35.00150$5,250
Total$41.00250$10,250
Profit / Loss Calculator
$
Enter a target price above to calculate profit or loss
Ad — In-ContentResponsive

Calculate Your Average Share Price

Whether you're dollar cost averaging into an ETF or averaging down on a stock, knowing your exact cost basis is essential. Enter each purchase — price and number of shares — and instantly see your weighted average cost per share, total investment, and profit or loss at any target price.

Averaging Down: Example Scenario

PurchasePriceSharesCostRunning Average
1st buy$50.00100$5,000$50.00
2nd buy$35.00150$5,250$41.00
3rd buy$40.00100$4,000$40.71

By buying more shares at lower prices, the average cost dropped from $50 to $40.71 — a 19% reduction in the break-even price.

Dollar Cost Averaging (DCA) vs Lump Sum

AspectDollar Cost AveragingLump Sum
StrategyFixed amount at regular intervalsInvest everything at once
RiskLower — spreads across timeHigher — depends on entry point
Historical returnsSlightly lower on averageSlightly higher on average
Emotional factorEasier — removes timing decisionsHarder — fear of buying at the top
Best forRegular income, risk-averse investorsWindfalls, confident long-term investors

When to Average Down (and When Not To)

  • DO average down when: the company's fundamentals are unchanged, the market is broadly down, you have a long time horizon, and the position won't exceed your portfolio limits
  • DON'T average down when: the company faces structural problems, earnings are declining, you're investing emotionally, or you'd exceed your risk tolerance
  • Set rules in advance — Decide your maximum position size and number of additions before you start
  • Consider the opportunity cost — Money used to average down could be invested elsewhere with better prospects

Frequently Asked Questions

What is averaging down?
Averaging down means buying more shares of a stock you already own after its price has dropped. This lowers your average cost per share, meaning you need a smaller recovery to break even or profit. For example, if you bought 100 shares at $50, then 100 more at $30, your average drops from $50 to $40 per share.
How is the average share price calculated?
The average price is the total cost of all purchases divided by the total number of shares. Formula: Average Price = (Price₁ × Shares₁ + Price₂ × Shares₂ + ...) ÷ (Shares₁ + Shares₂ + ...). This is a weighted average — buying more shares at a given price pulls the average more toward that price.
Is averaging down a good strategy?
Averaging down can be powerful if the stock is fundamentally sound and the price drop is temporary. However, it's risky if the company is declining — "catching a falling knife." Key considerations: only average down on stocks you'd buy today regardless, set a maximum position size, and never average down just because a stock is cheaper.
What is dollar cost averaging (DCA)?
Dollar cost averaging means investing a fixed dollar amount at regular intervals (e.g., $500 every month) regardless of price. This automatically buys more shares when prices are low and fewer when prices are high, smoothing out volatility. DCA is widely considered one of the best strategies for long-term investors.
How does cost basis affect taxes?
Your cost basis (average purchase price × shares) determines your capital gain or loss when you sell. If you sell above your cost basis, you owe capital gains tax on the profit. If below, you can claim a capital loss. Keeping accurate records of all purchase prices and quantities is essential for correct tax reporting.
Should I consider brokerage fees?
Yes, brokerage fees increase your effective cost basis. Add all trading fees and commissions to your purchase cost for accurate average price calculations. Many brokers now offer zero-commission trading for stocks and ETFs, but international shares and some platforms still charge per-trade fees.
Ad — Bottom728 × 90

Related Tools

📈Compound Interest Calculator 🎯Savings Goal Calculator 💱Currency Converter