About the Stock Average Calculator

By using the Stock Average Calculator, you can calculate the average cost of your stock holdings in seconds. Simply enter each purchase’s share quantity and price, and the tool will immediately display your total investment, weighted average price per share, and total shares. This makes tracking your **Stock Cost Basis** across multiple transactions effortless—no manual math required.


How to Use Our Share Average Calculator to Find Your Cost Basis

Our Share Average Calculator is a user-friendly tool designed for Stock investors to help assist in performing average calculation.


Understanding Your Average Cost (The Formula)

The average stock price is computed by summing the total purchase cost (i.e., the product of the purchase price per share and the corresponding number of shares for each transaction) and then dividing this sum by the total number of shares purchased.

  1. Total purchase price = Σ(Price of stock * Number of shares) + All fees
  2. Total shares = Σ(Number of shares)
  3. Average price = Total purchase price / Total shares

For example, suppose you currently own 150 shares at a price of 75, and you want to buy 250 shares at a new price of 150. The total purchase price is (150 x $75) + (250 x $150) = $48,750. Dividing this by the total number of shares (400) gives you an average price of $121.875. Our calculator handles this for you instantly.


Frequently Asked Questions (FAQ)

What is a Stock Average Calculator and why is it important?

A stock average calculator is a tool used to determine the average cost of a stock when multiple purchases have been made at different prices. This can be particularly useful for investors who use strategies like **dollar-cost averaging** or those who have made several transactions over time. Knowing your accurate average cost helps in managing your portfolio and making informed decisions about selling or buying more shares.

How does the "averaging down" strategy work, and what are the risks?

Averaging down is a strategy where an investor buys more shares of a stock after its price has dropped. This lowers the average cost per share, allowing the investor to potentially profit more quickly if the stock price recovers. However, this is a **high-risk strategy**. If the stock continues to fall, it can amplify your losses. This strategy is generally more suitable for value investors who have strong, long-term confidence in the company's fundamentals.

How to calculate your average stock price after selling?

The fundamental way to calculate the average cost of your remaining shares after selling is by considering the total cost of your remaining shares divided by the total number of shares remaining. **Your average purchase cost per share does not change when you sell.** What changes are your total number of shares, the total value of your position, and your overall profit or loss.


Understanding Your Investment Decisions: Why Cost Basis Matters

Your **stock cost basis** is the original value of an asset for tax purposes. It is crucial for calculating capital gains and losses when you sell your shares. Our calculator provides you with a precise cost basis, including all fees, making it a valuable tool for tax preparation and financial planning. Understanding this number empowers you to make smarter, data-driven decisions rather than emotional ones.