Loading the page...
Preparing tools and content for you. This usually takes a second.
Preparing tools and content for you. This usually takes a second.
Fetching calculator categories and tools for this section.
Learn how to average down stocks with our free calculator and formula guide. Calculate average cost basis when buying more shares at lower prices. Use our average down calculator, stock average down calculator, and averaging down calculator to determine your new cost basis. Example: 100 shares at $50 + 50 shares at $45 = $48.33 average cost. Our calculator helps you understand portfolio performance and optimize your investment strategy when averaging down on stock positions.
Last updated: February 2, 2026
Need a custom portfolio calculator for your platform? Get a Quote
Average Cost Basis
$47.14
Total Shares:
175
Total Cost:
$8,250
Current Value:
$8,750
Total P&L:
+$500
Total Return:
+6.06%
Averaging Down Strategy:
Important Considerations:
Averaging down can increase losses if the stock continues to decline. Only average down on stocks you believe in long-term and have done thorough research on. Diversification is key to managing risk.
Review your existing position:
Determine if averaging down makes sense:
Use the average down formula:
Average Cost = Total Investment ÷ Total Shares
Example: 100 shares at $50 + 50 shares at $45 = $7,250 ÷ 150 = $48.33 average
Set limits before averaging down:
After averaging down:
Average Cost = Total Investment ÷ Total Shares
100 shares at $60 = $6,000 investment
Average Cost: $60.00
Buy 50 more shares at $50 = $2,500 additional
New Average: $56.67 (150 shares, $8,500 total)
Breakeven price reduced from $60 to $56.67
Stock needs to reach $56.67 (not $60) to break even
Lower breakeven = Better position
Calculation features
Multiple Purchases, Average Cost
Tracks all purchases to determine your true cost basis per share
Performance metrics
P&L, Returns, Current Value
Comprehensive analysis of gains, losses, and total portfolio value
Strategy types
Regular, Periodic, Lump Sum
Compare different investment timing strategies and their outcomes
Position analysis
Size, Weight, Allocation
Understand position sizing and portfolio concentration risks
Price calculation
Weighted Average, Volume
Accurate weighted average calculations based on share volume
Investment analysis
Risk, Return, Strategy
Complete investment analysis with risk and return considerations
New average cost
Weighted Average
Calculate how averaging down affects your cost basis
For 100 shares at $50, plus 50 shares at $45, plus 25 shares at $40:
Average Cost Basis
$47.14
Total Return
6.06%
Our stock average down calculator uses weighted average calculations to determine your true cost basis when buying additional shares at different prices. The calculation considers all your purchases to provide accurate portfolio analysis and performance metrics for your stock investments.
Average Cost = Total Investment ÷ Total SharesWhere Total Investment = Σ(Shares × Price) for all purchases
Average Cost = (Shares₁ × Price₁ + Shares₂ × Price₂ + ...) ÷ Total SharesTotal Return % = (Current Value - Total Cost) ÷ Total Cost × 100This formula calculates the true average cost per share by weighting each purchase by the number of shares bought. It provides an accurate basis for determining your breakeven point and portfolio performance.
Shows how averaging down affects your cost basis and returns
Several factors influence the effectiveness of averaging down. Understanding these variables helps you make informed decisions about when and how much to invest in declining positions.
Need help with other investment strategies? Check out our covered call calculator and opportunity cost calculator.
Get Custom Calculator for Your PlatformResult: Average Cost Basis = $52.86, Total Return = 4.05%
By averaging down from $60 to $52.86, you've improved your breakeven point significantly.
$1,000 monthly investment over 12 months
Average price: $47.50, Total invested: $12,000
5% portfolio allocation limit on single stock
Max investment: $5,000 in $100,000 portfolio
Share it with others who need help with portfolio management
Suggested hashtags: #StockInvestment #PortfolioManagement #AveragingDown #Investing #Calculator