Stock Average Calculator

Calculate the average price of your stock holdings.

Runs in your browser — your data never leaves your device

Purchase Lots

Overall Average

Total Shares

Total Cost Basis

$2,300.00

Average Price per Share

$153.33

Holding Period Breakdown

Long-Term (> 1 year)

Shares: 10

Cost Basis: $1,500.00

Avg. Price: $150.00

Short-Term (≤ 1 year)

Shares: 5

Cost Basis: $800.00

Avg. Price: $160.00

Calculate your average cost basis across multiple stock purchases and see a breakdown of long-term vs short-term holdings for smarter tax planning.

Long-Term vs Short-Term Holdings

The IRS distinguishes between long-term and short-term capital gains based on how long you hold an asset. This distinction directly affects the tax rate you pay on profits.

Long-Term (> 1 year)

Assets held for more than one year qualify for long-term capital gains tax rates, which are typically 0%, 15%, or 20% depending on your income bracket. This tool automatically identifies which of your lots qualify.

Short-Term (≤ 1 year)

Assets held for one year or less are taxed at your ordinary income tax rate, which can be significantly higher. Tracking your short-term lots helps you plan for tax obligations.

How to Use

Enter each purchase lot you've made for a stock, including the number of shares, price per share, and purchase date. The calculator determines your weighted average cost and splits your holdings by holding period.

Enter the stock symbol, number of shares, purchase price, and date for each lot.
Click "Add Lot" to record additional purchases.
View your overall average price and total cost basis in the summary cards.
Check the holding period breakdown to see long-term vs short-term splits.

Frequently Asked Questions

What does the stock average calculator do?

It calculates the weighted average cost per share across multiple buy transactions, helping you understand your true cost basis for tax and investment decisions.

How do I use the calculator?

Add each purchase by entering the number of shares and the buy price per share. The tool computes the average cost, total investment, and current portfolio value.

Can I separate long-term and short-term holdings?

Yes. The tool supports lot tracking where you can tag each purchase with a date, and it separates holdings into long-term (held over one year) and short-term categories for tax planning.

What is a stock cost basis?

The cost basis is the total amount you paid for your shares including any commissions. It's used to calculate capital gains or losses when you sell.

Is this calculator free?

Yes, ToolDock's stock average calculator is completely free, requires no signup, and runs entirely in your browser.

Stock Data

Fetch near real-time stock data for any ticker symbol.

Profit/Loss Calculator

Calculate profit or loss from a transaction, including margin and ROI.

Vesting Schedule Calculator

Analyze and visualize your stock vesting timeline.

Long-Term (> 1 year)

Short-Term (≤ 1 year)

Long-Term vs Short-Term Holdings

Long-Term (> 1 year)

Short-Term (≤ 1 year)

How to Use

Frequently Asked Questions

What does the stock average calculator do?

How do I use the calculator?

Can I separate long-term and short-term holdings?

What is a stock cost basis?

Is this calculator free?

Related Tools

Long-Term (> 1 year)

Short-Term (≤ 1 year)

Long-Term vs Short-Term Holdings

Long-Term (> 1 year)

Short-Term (≤ 1 year)

How to Use