Area to Square Feet Converter Area Value: Original Unit: Acres Square Meters (m²) Square Yards (yd²) Square Miles (mi²) Hectares (ha) Square Kilometers (km²) Square Centimeters (cm²) Square Inches (in²) Convert to Square Feet Enter values and click ‘Convert’ to…

Watt-Hour Calculator Device Power (Watts): (Enter if you know the power directly, otherwise use Voltage and Current) Voltage (Volts): (Required if Device Power is not entered) Current (Amps): (Required if Device Power is not entered) Usage Duration (Hours): Calculate Watt-Hours…

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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:…

Menstrual Cycle Length Calculator Enter the start dates of your last few menstrual periods to calculate your average cycle length. For best accuracy, provide at least three consecutive period start dates. Period Start Date 1: Period Start Date 2: Period…

Stock Volatility Calculator Estimate the annualized volatility of a stock based on a sample of historical returns. Volatility is a measure of how much a stock’s price fluctuates over time, often expressed as the standard deviation of its returns. Return…

Ovulation Calculator First Day of Last Menstrual Period: Average Cycle Length (days): Luteal Phase Length (days, typically 12-16): Calculate Ovulation function calculateOvulation() { var lastPeriodStartStr = document.getElementById(“lastPeriodStart”).value; var averageCycleLength = parseFloat(document.getElementById(“averageCycleLength”).value); var lutealPhaseLength = parseFloat(document.getElementById(“lutealPhaseLength”).value); var resultDiv = document.getElementById(“result”); if…

Series Circuit Total Resistance Calculator Enter the resistance value for each component in Ohms (Ω). Resistance 1 (Ω): Resistance 2 (Ω): Resistance 3 (Ω): Resistance 4 (Ω): Resistance 5 (Ω): (Enter 0 for unused resistance inputs) Calculate Total Resistance Total…

Weekly Payroll Calculator Hourly Rate ($): Regular Hours Worked: Overtime Hours Worked: Overtime Multiplier (e.g., 1.5 for time and a half): Weekly Bonuses/Commissions ($): Total Deductions (% of Gross Pay): Calculate Weekly Payroll function calculateWeeklyPayroll() { var hourlyRate = parseFloat(document.getElementById(“hourlyRate”).value);…

Yards of Soil Calculator Length of Area (feet): Width of Area (feet): Desired Depth (inches): Calculate Soil Yards function calculateSoilYards() { var lengthFeet = parseFloat(document.getElementById(‘soilLength’).value); var widthFeet = parseFloat(document.getElementById(‘soilWidth’).value); var depthInches = parseFloat(document.getElementById(‘soilDepth’).value); var resultDiv = document.getElementById(‘soilResult’); // Input validation…