This calculator helps you estimate the potential value of your employee stock options at a future date, considering different scenarios for the stock price and the number of options you hold.
function calculateOptionValue() {
var grantPrice = parseFloat(document.getElementById("grantPrice").value);
var numberOfOptions = parseInt(document.getElementById("numberOfOptions").value);
var vestingDate = parseInt(document.getElementById("vestingDate").value);
var futureStockPrice = parseFloat(document.getElementById("futureStockPrice").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(grantPrice) || isNaN(numberOfOptions) || isNaN(vestingDate) || isNaN(futureStockPrice)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (grantPrice < 0 || numberOfOptions <= 0 || vestingDate <= 0 || futureStockPrice < 0) {
resultDiv.innerHTML = "Please enter positive values for number of options and vesting date, and non-negative values for prices.";
return;
}
// Calculation:
// The intrinsic value of an option is the difference between the stock price and the grant (strike) price.
// If the future stock price is less than the grant price, the option has no intrinsic value.
var intrinsicValuePerOption = Math.max(0, futureStockPrice – grantPrice);
var totalIntrinsicValue = intrinsicValuePerOption * numberOfOptions;
var output = "