The Stock Increase Calculator helps investors and traders quickly determine the percentage and absolute gain of a stock over a specific period. This is crucial for evaluating investment performance, setting profit targets, and making informed decisions about buying or selling.
How it Works (The Math)
The calculator uses a straightforward formula to determine the stock increase:
Absolute Increase: This is the difference between the final stock price and the initial stock price.
Absolute Increase = Final Stock Price - Initial Stock Price
Percentage Increase: This expresses the absolute increase as a proportion of the initial stock price, multiplied by 100 to represent it as a percentage.
Percentage Increase = ((Final Stock Price - Initial Stock Price) / Initial Stock Price) * 100
Example Calculation
Let's say you bought a stock at $150.75 (Initial Stock Price) and its price has risen to $175.50 (Final Stock Price).
This means the stock has increased by $24.75 in value, representing a gain of approximately 16.42% from its initial purchase price.
When to Use This Calculator
Evaluating a stock's performance after a day, week, month, or year.
Comparing the returns of different investments.
Setting realistic profit targets for your trades.
Understanding the growth trajectory of your portfolio.
Quickly assessing the impact of a price change.
By using this Stock Increase Calculator, you can gain immediate insights into your investment's performance, empowering you with the data needed for strategic financial planning.
function calculateStockIncrease() {
var initialPriceInput = document.getElementById("initialPrice");
var finalPriceInput = document.getElementById("finalPrice");
var resultContainer = document.getElementById("resultContainer");
var increaseAmountDisplay = document.getElementById("increaseAmount");
var increasePercentageDisplay = document.getElementById("increasePercentage");
var initialPrice = parseFloat(initialPriceInput.value);
var finalPrice = parseFloat(finalPriceInput.value);
// Clear previous results
increaseAmountDisplay.textContent = "";
increasePercentageDisplay.textContent = "";
resultContainer.style.display = "none";
// Input validation
if (isNaN(initialPrice) || isNaN(finalPrice)) {
alert("Please enter valid numbers for both Initial and Final Stock Prices.");
return;
}
if (initialPrice < 0 || finalPrice < 0) {
alert("Stock prices cannot be negative.");
return;
}
if (initialPrice === 0) {
alert("Initial stock price cannot be zero when calculating percentage increase.");
return;
}
var absoluteIncrease = finalPrice – initialPrice;
var percentageIncrease = (absoluteIncrease / initialPrice) * 100;
increaseAmountDisplay.textContent = "$" + absoluteIncrease.toFixed(2);
increasePercentageDisplay.textContent = percentageIncrease.toFixed(2) + "%";
resultContainer.style.display = "block";
}