Return on Investment (ROI) Calculator Total Revenue from Investment: Total Cost of Investment: Calculate ROI function calculateROI() { var investmentRevenue = parseFloat(document.getElementById(“investmentRevenue”).value); var investmentCost = parseFloat(document.getElementById(“investmentCost”).value); var roiResultDiv = document.getElementById(“roiResult”); if (isNaN(investmentRevenue) || isNaN(investmentCost) || investmentRevenue < 0 || investmentCost…

Percentile Calculator Use this calculator to determine the percentile rank of a specific score within a dataset. This calculation uses the common formula: Percentile Rank = ((Number of Scores Below X + 0.5 * Number of Scores Equal to X)…

Percentage of a Number Calculator Use this calculator to quickly determine what percentage one number is of another. Value of the Part: Value of the Whole: Calculate Percentage Result: Enter values and click ‘Calculate’ function calculatePercentage() { var partValueInput =…

Projectile Range Calculator Initial Velocity (m/s): Launch Angle (degrees): Launch Height (m): Acceleration due to Gravity (m/s²): Calculate Range function calculateProjectileRange() { var initialVelocity = parseFloat(document.getElementById(‘initialVelocity’).value); var launchAngleDegrees = parseFloat(document.getElementById(‘launchAngle’).value); var launchHeight = parseFloat(document.getElementById(‘launchHeight’).value); var gravity = parseFloat(document.getElementById(‘gravity’).value); var resultDiv…

Debt-to-Income Ratio Calculator Gross Monthly Income: Monthly Housing Payment (Mortgage/Rent): Monthly Car Loan Payment: Monthly Student Loan Payment: Monthly Minimum Credit Card Payments: Monthly Other Loan Payments: Calculate DTI function calculateDTI() { var grossMonthlyIncome = parseFloat(document.getElementById(‘grossMonthlyIncome’).value) || 0; var monthlyHousingPayment…

Cost of Living Index Comparison Calculator Your Current Annual Salary ($): Current City’s Cost of Living Index (e.g., 100 for national average): Target City’s Cost of Living Index (e.g., 130 for expensive, 80 for cheaper): Calculate Equivalent Salary Calculation Results:…

Average Atomic Mass Calculator Enter the mass and natural abundance for each isotope. You can use up to three isotopes. Isotope 1 Isotope Mass (amu): Natural Abundance (%): Isotope 2 Isotope Mass (amu): Natural Abundance (%): Isotope 3 (Optional) Isotope…

Linear Feet Calculator Use this calculator to determine the total linear feet for your project based on the length of individual pieces and the quantity needed. Length of One Piece (feet): Number of Pieces: Calculate Linear Feet Total Linear Feet:…

Cylinder Volume Calculator Radius (cm): Height (cm): Calculate Volume The volume of the cylinder will appear here. function calculateCylinderVolume() { var radiusInput = document.getElementById(“cylinderRadius”).value; var heightInput = document.getElementById(“cylinderHeight”).value; var radius = parseFloat(radiusInput); var height = parseFloat(heightInput); if (isNaN(radius) || isNaN(height)…

Debt Service Coverage Ratio (DSCR) Calculator Use this calculator to determine the Debt Service Coverage Ratio (DSCR) for a property or business, a key metric for lenders and investors. Annual Net Operating Income ($): Annual Principal Payments ($): Annual Interest…