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  • BMI Calculator
    Calculate your BMI in seconds. Enter height and weight in metric or imperial units to get your body mass index and weight category instantly.
  • Healthy Weight Calculator
    Enter your height in ft/in or cm to see the healthy weight range using BMI guidelines, with results in lbs or kg. Supports US and metric units.
  • CPI Inflation Calculator
    Adjust US dollars for inflation between any two months and years. Enter an amount, start month/year, and end month/year to get CPI‑U adjusted value from BLS data.
  • Vote Percentage Calculator
    Calculate and visualize vote percentages for multiple candidates with our easy-to-use Vote Percentage Calculator. Input votes, see instant results, and view a colorful bar chart representation of the election outcomes.
  • Height Calculator
    Predict a child's adult height from biological parents' heights using the mid-parental height formula. Returns predictions for both boys and girls in cm and ft+in with 95% confidence range.
  • Auto Lease Calculator
    Estimate your monthly auto lease payment. Enter price, term, APR, down payment, trade-in, sales tax, and residual value to get the depreciation fee, finance charge, monthly tax, and total cost.
  • Annuity Payout Calculator
    Calculate the periodic withdrawal from an annuity given a principal, interest rate, and payout horizon — or solve for how long the principal lasts at a given periodic withdrawal. Supports annual through biweekly frequencies.
  • Tile Calculator
    Calculate the exact number of tiles and boxes for any floor, wall, or backsplash. Accounts for grout gap, supports independent metric/imperial units for tile and surface, with a 5–10% overage recommendation and optional cost estimate.
  • Concrete Calculator
    Calculate concrete volume, weight, and bag count for slabs, columns, and tubes. Supports mixed metric/imperial units, quantity multiplier, and 40/60/80-lb bag sizes.
  • Horsepower Calculator
    Calculate horsepower from torque and RPM, from electrical input (V × A), or convert between HP, kW, W, BTU/hr, and metric PS.
  • GDP Calculator
    Calculate Gross Domestic Product (GDP) using the expenditure approach (C + I + G + X − M) or the income approach (sum of compensation, proprietors' income, rents, corporate profits, interest, indirect taxes, depreciation, and net foreign income).
  • Bond Calculator
    Calculate bond price from yield (or yield from price) using PV of cashflows, plus dirty/clean prices and accrued interest with full day-count convention support (30/360, Actual/360, Actual/365, Actual/Actual).
  • Mutual Fund Calculator
    Project mutual fund returns net of all fees — front-end load, deferred sales charge, and operating expenses. Outputs ending value, total principal, net return, and Net IRR (true annualized rate after fees).
  • Mulch Calculator
    Calculate exactly how much mulch you need — in cubic feet, cubic yards, or cubic meters — plus weight, bags required, and total cost. Supports rectangle, circle, triangle, or pre-computed total area, with bulk or bag pricing.
  • Roofing Calculator
    Calculate actual sloped roof area from footprint and pitch (rise/run), with roofing squares, shingle bundles needed, waste buffer, and material cost.
  • BTU Calculator
    Estimate the BTU/hr cooling capacity needed for any room. Adjusts for area, ceiling height, insulation, sun exposure, occupants, room type, and climate. Returns recommended AC unit size.
  • CD Calculator
    Calculate the maturity value of a certificate of deposit (CD). Supports any compounding frequency (annual, monthly, daily, continuous), shows APY, total interest, and after-tax projections.
  • Payback Period Calculator
    Calculate how long an investment takes to pay back its initial cost. Supports constant or growing cashflows and computes both simple and discounted (present-value) payback periods with a year-by-year cashflow schedule.
  • Half-Life Calculator
    Solve any half-life decay variable: remaining quantity, initial quantity, elapsed time, or half-life. Includes decay constant and mean lifetime.
  • Day of the Week Calculator
    Find the day of the week (Monday–Sunday) for any past, present, or future date. Also returns day-of-year, ISO week number, and leap-year status.
  • Tire Size Calculator
    Compute tire diameter, circumference, and revs/mile from a P-metric tire code (e.g., 215/55R17), plus compare two tire sizes for speedometer and odometer impact.
  • Rental Property Calculator
    Analyze a rental property investment: monthly cash flow, cap rate, cash-on-cash return, and NOI from purchase price, financing terms, rent, and operating expenses.
  • 2's Complement Calculator
    Enter a decimal, binary, or hex number, choose 8-, 16-, or 32-bit, and get its two’s complement value instantly for programming and digital logic.
  • Net Income Calculator
    Enter gross income, total deductions, and tax rate to calculate net income and take-home pay after tax for clearer budgeting.
  • Compound Annual Growth Rate Calculator
    Enter beginning value, ending value, and years to calculate your compound annual growth rate (CAGR) and see the annualized return instantly.

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