Target Heart Rate Range Calculator Your Age (Years): Calculate Target Heart Rate function calculateTargetHeartRate() { var ageInput = document.getElementById(“age”); var age = parseFloat(ageInput.value); var resultDiv = document.getElementById(“targetHeartRateResult”); // Clear previous results resultDiv.innerHTML = “”; if (isNaN(age) || age 120) {…

Swim Pool Volume & Chemical Calculator Pool Shape: Rectangle Oval / Round Kidney Pool Length (feet): Pool Width (feet): Average Pool Depth (feet): Current Free Chlorine (ppm): Target Free Chlorine (ppm): Calculate Pool Metrics function calculatePoolMetrics() { var poolShape =…

Synthroid (Levothyroxine) Dosage Calculator This calculator provides an estimated Synthroid (levothyroxine) dosage based on body weight and helps suggest adjustments based on current and target TSH levels. It is for informational purposes only and should not replace professional medical advice.…

Subwoofer Wiring Gauge Calculator Use this calculator to determine the appropriate power wire gauge (AWG) for your car audio subwoofer amplifier, ensuring optimal power delivery and minimizing voltage drop. Amplifier RMS Power (Watts): Amplifier Efficiency (%): Typical: Class AB (50-70%),…

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:…

Quadratic Factoring Calculator (ax² + bx + c) Enter the coefficients of your quadratic equation to factor it step-by-step using the “splitting the middle term” method. Coefficient of x² (a): Coefficient of x (b): Constant Term (c): Factor Polynomial Factored…

Subfloor Panel Calculator Use this calculator to estimate the number of subfloor panels you’ll need for your project, including an allowance for waste. Room Length (feet): Room Width (feet): Subfloor Panel Length (feet): Subfloor Panel Width (feet): Waste Factor (%):…

T-Bill Rate Calculator Use this calculator to determine the Discount Rate (Bank Discount Yield) and Investment Rate (Bond Equivalent Yield) for a Treasury Bill based on its face value, purchase price, and days to maturity. Face Value ($): Purchase Price…

Suburban Payroll Calculator Gross Annual Salary: Pay Frequency: Weekly Bi-Weekly Semi-Monthly Monthly Federal Income Tax Rate (%): State Income Tax Rate (%): Local Income Tax Rate (%): Health Insurance Premium (Monthly): Retirement Contribution (% of Gross Pay): Other Pre-Tax Deductions…

Superbuy Shipping Cost Estimator Use this calculator to estimate the international shipping costs for your Superbuy parcels. Remember that actual costs can vary based on packaging, exact carrier rates, and additional services. Actual Item Weight (kg): Package Length (cm): Package…