Stock Average Calculator

Updated on 12-Jul-2025

Calculate your average stock price based on multiple purchase prices and quantities. Get total investment, total quantity, and average cost per share instantly.

Stock Price ($) Quantity Action

Average Cost Calculation

Total Investment

$0.00

Total Quantity

0 shares

Average Price

$0.00

What is a Stock Average Calculator?

A Stock Average Calculator helps investors calculate the average price they paid for shares bought at different prices and quantities. This is especially useful if you've bought the same stock multiple times at different rates.

By knowing your average buy price, you can better evaluate your profit or loss when the market price changes.

Formulas Used

1. Total Investment

Total Investment=(P1×Q1)+(P2×Q2)\text{Total Investment} = (P_1 \times Q_1) + (P_2 \times Q_2)

Where:

  • P1P_1 P2P_2= Stock Prices
  • Q1,Q2Q_1, Q_2​​​​​​​​ = Quantities bought at each price

2. Total Quantity

Total Quantity=Q1+Q2\text{Total Quantity} = Q_1 + Q_2

3. Average Stock Price

Average Price=Total InvestmentTotal Quantity\text{Average Price} = \frac{\text{Total Investment}}{\text{Total Quantity}}

Example Calculation

Let’s say you made the following purchases:

  • Bought 10 shares at $100
  • Bought 20 shares at $80

Step 1: Total Investment

Total Investment=(100×10)+(80×20)=1000+1600=2600\text{Total Investment} = (100 \times 10) + (80 \times 20) = 1000 + 1600 = 2600

Step 2: Total Quantity

Total Quantity=10+20=30\text{Total Quantity} = 10 + 20 = 30

Step 3: Average Price

Average Price=26003086.67\text{Average Price} = \frac{2600}{30} \approx 86.67

Final Output:

  • Total Investment: $2,600
  • Total Quantity: 30 shares
  • Average Stock Price: $86.67

Conclusion

A Stock Average Calculator is essential for investors who make multiple stock purchases at different prices. It gives you an accurate average cost per share, helping you better understand your break-even point and make smarter investment decisions.

Stock Average Calculator