Chi-Square Calculator The Chi-Square ($\chi^2$) test is a fundamental statistical hypothesis test used to determine if there is a significant difference between the observed frequencies and the expected frequencies in one or more categories. It’s a non-parametric test, meaning it…

Chinese Pregnancy Gender Predictor Your Lunar Age at Conception: (This is often your Gregorian age + 1, or calculated based on Chinese New Year. Typically between 18 and 45.) Lunar Month of Conception: Select Lunar Month 1 (Jan/Feb) 2 (Feb/Mar)…

Clipboard System Efficiency Calculator Estimate the time savings and productivity gains from using an integrated clipboard, storage, and calculator system in your daily workflow. Daily Clipboard Operations: times/day How many times do you copy/paste data daily? Avg. Clipboard Item Size:…

Coil Spring Calculator Wire Diameter (d) in mm: Mean Coil Diameter (D) in mm: Number of Active Coils (Na): Modulus of Rigidity (G) in GPa: (e.g., Steel: ~79 GPa, Bronze: ~40 GPa) Applied Load (F) in Newtons (Optional): (Enter to…

Golf Club Length Calculator Your Height (Feet): Inches: Wrist-to-Floor Measurement (Inches): Calculate Recommended Club Length function calculateClubLength() { var heightFeet = parseFloat(document.getElementById(“golferHeightFeet”).value); var heightInches = parseFloat(document.getElementById(“golferHeightInches”).value); var wristToFloor = parseFloat(document.getElementById(“wristToFloor”).value); var resultDiv = document.getElementById(“clubLengthResult”); if (isNaN(heightFeet) || isNaN(heightInches) || isNaN(wristToFloor)…

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:…

Classic Car Valuation Calculator Estimate the current market value of your classic car by adjusting a base value based on key factors like condition, originality, and history. This tool helps you understand how different aspects contribute to your vehicle’s overall…

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:…

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:…

CNC Speed and Feed Calculator Cutting Speed (SFM): Tool Diameter (inches): Number of Flutes: Chip Load per Tooth (IPT): Calculate Speed & Feed Results: Spindle Speed (RPM): Feed Rate (IPM): function calculateCncSpeedAndFeed() { var cuttingSpeedSFM = parseFloat(document.getElementById(‘cuttingSpeedSFM’).value); var toolDiameterInches =…