Stock Calculator

Stock Profit & Loss Calculator

Use this calculator to estimate the potential profit or loss, return on investment (ROI), and break-even price for a stock trade, taking into account both buying and selling commissions.

function calculateStockTrade() { var purchasePrice = parseFloat(document.getElementById('purchasePrice').value); var sellingPrice = parseFloat(document.getElementById('sellingPrice').value); var numberOfShares = parseFloat(document.getElementById('numberOfShares').value); var commissionPerTrade = parseFloat(document.getElementById('commissionPerTrade').value); var resultsDiv = document.getElementById('stockResults'); // Input validation if (isNaN(purchasePrice) || purchasePrice < 0) { resultsDiv.innerHTML = 'Please enter a valid Purchase Price per Share.'; return; } if (isNaN(sellingPrice) || sellingPrice < 0) { resultsDiv.innerHTML = 'Please enter a valid Selling Price per Share.'; return; } if (isNaN(numberOfShares) || numberOfShares <= 0) { resultsDiv.innerHTML = 'Please enter a valid Number of Shares (must be greater than 0).'; return; } if (isNaN(commissionPerTrade) || commissionPerTrade < 0) { resultsDiv.innerHTML = 'Please enter a valid Commission per Trade.'; return; } // Calculations var totalPurchaseCost = (purchasePrice * numberOfShares) + commissionPerTrade; var totalSellingProceeds = (sellingPrice * numberOfShares) – commissionPerTrade; var totalProfitLoss = totalSellingProceeds – totalPurchaseCost; var roi = (totalProfitLoss / totalPurchaseCost) * 100; var breakEvenPrice = ((purchasePrice * numberOfShares) + (2 * commissionPerTrade)) / numberOfShares; // Display results var resultHTML = '

Calculation Results:

'; resultHTML += 'Total Purchase Cost: $' + totalPurchaseCost.toFixed(2) + "; resultHTML += 'Total Selling Proceeds: $' + totalSellingProceeds.toFixed(2) + "; resultHTML += 'Total Profit/Loss: = 0 ? 'green' : 'red') + ';">$' + totalProfitLoss.toFixed(2) + ''; resultHTML += 'Return on Investment (ROI): = 0 ? 'green' : 'red') + ';">' + roi.toFixed(2) + '%'; resultHTML += 'Break-Even Price per Share: $' + breakEvenPrice.toFixed(2) + "; resultsDiv.innerHTML = resultHTML; } .stock-calculator-container { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f9f9f9; padding: 25px; border-radius: 10px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); max-width: 600px; margin: 30px auto; border: 1px solid #e0e0e0; } .stock-calculator-container h2 { color: #2c3e50; text-align: center; margin-bottom: 20px; font-size: 1.8em; } .stock-calculator-container p { color: #555; line-height: 1.6; margin-bottom: 15px; } .calculator-form .form-group { margin-bottom: 18px; } .calculator-form label { display: block; margin-bottom: 8px; color: #34495e; font-weight: bold; font-size: 0.95em; } .calculator-form input[type="number"] { width: calc(100% – 20px); padding: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 1em; box-sizing: border-box; transition: border-color 0.3s ease; } .calculator-form input[type="number"]:focus { border-color: #007bff; outline: none; box-shadow: 0 0 5px rgba(0, 123, 255, 0.2); } .calculator-form button { display: block; width: 100%; padding: 14px 20px; background-color: #28a745; color: white; border: none; border-radius: 6px; font-size: 1.1em; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; margin-top: 25px; } .calculator-form button:hover { background-color: #218838; transform: translateY(-2px); } .calculator-results { margin-top: 30px; padding: 20px; background-color: #e9f7ef; border: 1px solid #d4edda; border-radius: 8px; } .calculator-results h3 { color: #2c3e50; margin-top: 0; margin-bottom: 15px; font-size: 1.5em; border-bottom: 2px solid #d4edda; padding-bottom: 10px; } .calculator-results p { margin-bottom: 10px; font-size: 1.05em; color: #333; } .calculator-results p strong { color: #2c3e50; } .calculator-results .error { color: #dc3545; font-weight: bold; background-color: #f8d7da; border: 1px solid #f5c6cb; padding: 10px; border-radius: 5px; } .calculator-results span.green { color: green; font-weight: bold; } .calculator-results span.red { color: red; font-weight: bold; }

Understanding Your Stock Trade

A stock calculator is an essential tool for investors to analyze the potential outcomes of buying and selling shares. It helps in understanding the financial implications of a trade before it's executed, or to review past performance.

How the Stock Profit & Loss Calculator Works:

This calculator takes into account several key factors to provide a comprehensive overview of your stock trade:

• Purchase Price per Share: This is the price at which you initially bought each share of the stock. It's crucial for determining your initial investment.
• Selling Price per Share: This is the price at which you plan to sell, or have sold, each share. The difference between this and the purchase price is a primary driver of profit or loss.
• Number of Shares: The total quantity of shares involved in your trade. This multiplies with the per-share prices to give total transaction values.
• Commission per Trade ($): Brokerage firms often charge a fee for each transaction (buying and selling). This calculator assumes a flat commission fee for both the buy and sell orders, which directly impacts your net profit or loss.

Key Metrics Explained:

• Total Purchase Cost: This is the total amount of money you spent to acquire the shares, including the initial purchase price multiplied by the number of shares, plus the commission paid for the buying transaction.
• Total Selling Proceeds: This is the total amount of money you receive from selling your shares, which is the selling price per share multiplied by the number of shares, minus the commission paid for the selling transaction.
• Total Profit/Loss: This is the ultimate financial outcome of your trade. It's calculated by subtracting the Total Purchase Cost from the Total Selling Proceeds. A positive number indicates a profit, while a negative number indicates a loss.
• Return on Investment (ROI): Expressed as a percentage, ROI measures the efficiency of your investment. It shows how much profit you made relative to your initial investment (Total Purchase Cost). A higher ROI indicates a more successful trade.
• Break-Even Price per Share: This is the minimum selling price per share required for you to cover all your costs (initial purchase and both commissions) and end up with zero profit or loss. Knowing this helps you set realistic selling targets.

Example Scenario:

Let's say you bought 50 shares of a company at a Purchase Price per Share of $100.00. Your broker charges a Commission per Trade of $5.00. You later sell these shares at a Selling Price per Share of $110.00.

• Total Purchase Cost: (50 shares * $100.00) + $5.00 = $5,000.00 + $5.00 = $5,005.00
• Total Selling Proceeds: (50 shares * $110.00) – $5.00 = $5,500.00 – $5.00 = $5,495.00
• Total Profit/Loss: $5,495.00 – $5,005.00 = $490.00
• Return on Investment (ROI): ($490.00 / $5,005.00) * 100 = 9.79%
• Break-Even Price per Share: ((50 shares * $100.00) + (2 * $5.00)) / 50 shares = ($5,000.00 + $10.00) / 50 = $5,010.00 / 50 = $100.20

In this example, you would make a profit of $490.00, representing a 9.79% return on your investment. You would need to sell each share for at least $100.20 to cover all your costs.

Important Considerations:

While this calculator provides a solid foundation for understanding trade outcomes, remember that actual investment results can be influenced by other factors not included here, such as:

• Taxes: Capital gains taxes can significantly impact your net profit.
• Dividends: If the stock pays dividends, these would add to your overall return.
• Slippage: The difference between the expected price of a trade and the price at which the trade is actually executed.
• Market Volatility: Rapid price changes can affect your ability to execute trades at desired prices.

Always conduct thorough research and consider consulting a financial advisor before making investment decisions.