Hours Calculator Easily calculate the total net hours worked or spent on an activity, accounting for start time, end time, and any breaks taken. Start Time: End Time: Break Duration (minutes): Calculate Hours function parseTime(timeString) { var timeParts = timeString.match(/(\d+):(\d+)\s*(AM|PM)?/i);…

Market Size Calculator Total Potential Customers: The total number of individuals or businesses that could potentially use your product Target Market Penetration Rate (%): The estimated percentage of potential customers you expect to capture. Average Annual Purchase Frequency: How many…

Countertop Square Footage Calculator Enter the length and width for each countertop section in inches. You can leave sections blank if you don’t need them. Section 1 Length (inches): Width (inches): Section 2 Length (inches): Width (inches): Section 3 (Optional)…

Coefficient of Kinetic Friction Calculator Kinetic Friction Force (Fk) in Newtons (N): Normal Force (N) in Newtons (N): Calculate Coefficient Enter values and click ‘Calculate Coefficient’ to see the result. function calculateKineticFriction() { var kineticFrictionForce = parseFloat(document.getElementById(“kineticFrictionForce”).value); var normalForce =…

Net Pay Calculator Use this calculator to estimate your take-home pay after various deductions. Understanding your net pay is crucial for budgeting and financial planning. Gross Annual Salary: Pay Frequency: Annually Monthly Bi-Weekly Weekly Estimated Federal Income Tax Rate (%):…

Total R-Value Calculator R-value of Interior Air Film: R-value of Interior Finish (e.g., Drywall): R-value of Insulation Layer: R-value of Sheathing Layer (e.g., OSB, Plywood): R-value of Exterior Finish (e.g., Siding, Brick): R-value of Exterior Air Film: Calculate Total R-Value…

Triangle Perimeter Calculator Length of Side A (units): Length of Side B (units): Length of Side C (units): Calculate Perimeter Perimeter: 12 units function calculatePerimeter() { var sideA = parseFloat(document.getElementById(‘sideALength’).value); var sideB = parseFloat(document.getElementById(‘sideBLength’).value); var sideC = parseFloat(document.getElementById(‘sideCLength’).value); var resultDiv…

Wall Square Footage Calculator Wall Length (feet): Wall Height (feet): Deductions (Optional) Number of Windows: Avg. Window Width (feet): Avg. Window Height (feet): Number of Doors: Avg. Door Width (feet): Avg. Door Height (feet): Calculate Square Footage Calculation Results Total…

Countertop Square Footage Calculator Countertop Section 1 Length (inches): Width (inches): Add Another Section Calculate Square Footage Total Countertop Square Footage: 0.00 sq ft var sectionCount = 1; function addCountertopSection() { sectionCount++; var sectionsContainer = document.getElementById(‘sectionsContainer’); var newSectionDiv = document.createElement(‘div’);…

Estimated Federal Income Tax Withholding Calculator Use this calculator to estimate your federal income tax withholding based on your annual income, filing status, and common deductions and credits. This tool can help you adjust your W-4 form to avoid underpaying…