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  • Percentage Growth Calculator
    Enter initial and final values to calculate percent change using (final - initial)/initial * 100 and see how much it increased or decreased.
  • Classes You Can Skip Calculator
    Free bunk calculator: find how many classes you can skip while staying above your required attendance percentage. Enter attended, total and required %.
  • Resistivity Calculator
    Calculate the electrical resistance of a wire from its resistivity, length, and cross-sectional area using R = ρL/A. Free, instant, accurate.
  • Common-Ion Effect Calculator
    Convert Ksp to molar solubility for any salt MxAy. Enter Ksp and stoichiometric coefficients to find s and ion concentrations in mol/L.
  • Slot Machine RTP Calculator
    Calculate how many wallpaper rolls you need for a room. Enter wall size, roll dimensions and pattern repeat to get rolls, strips and strips per roll.
  • Vacation Burnout Recovery Calculator
    Estimate your burnout index from Maslach (MBI) subscale scores: emotional exhaustion, depersonalization and personal accomplishment, on a 0-100 scale.
  • Loom Rubber Band Bracelet Calculator
    Calculate how many beads you need for a bracelet based on wrist size, bead diameter, and ease. Free, instant bead count calculator for jewelry makers.
  • Dog Pregnancy Calorie Calculator
    Predict your puppy's adult weight from its current weight, age in weeks and breed size. Free estimator for small, medium and large dogs.
  • Dog Blood Pressure Calculator
    Calculate a dog's body surface area (BSA) in square meters from body weight using the standard 10.1 × weight^(2/3) veterinary formula.
  • Net Paycheck Calculator by State
    Estimate US state income tax with flat-rate, progressive bracket, or no-tax options. See your state tax, net income, and effective rate instantly.
  • Pay Period to Annual Salary Calculator
    Find how many paychecks you get per year by pay frequency (weekly, bi-weekly, semi-monthly, monthly) and your gross pay per check.
  • Discount Factor (Present Value of $1) Table Creator
    Calculate your fixed monthly mortgage payment, total interest, and full amortization breakdown from loan amount, interest rate, and term.
  • Modified Sgarbossa Criteria Calculator
    Calculate RMSSD heart rate variability from RR intervals. Also returns SDNN, mean RR interval and average heart rate from your beat-to-beat data.
  • Replacement Value Calculator
    Calculate Net Asset Value (NAV) and NAV per share from total assets, total liabilities, and shares outstanding. Free, instant, accurate.
  • IELTS to GPA Conversion Calculator
    Convert percentage marks to CGPA on a 10-point scale instantly. Uses the standard CGPA = Percentage / 9.5 formula for Indian universities (CBSE/AICTE).
  • TDEE to BMI Goal Weight Calculator
    Find your target body weight for any goal BMI. Enter your height and desired BMI to instantly calculate the weight (kg) you need to reach.
  • Capacitive Voltage Divider Calculator
    Calculate the output voltage of a resistive voltage divider using Vout = Vin × R2 / (R1 + R2). Also gives divider ratio, current and power.
  • Dog Flea Treatment Cost Calculator
    Estimate the yearly cost of owning a pet. Add monthly food, treats, vet, grooming, supplies and insurance to see your true annual pet budget.
  • Earnings Per Visitor Calculator
    Calculate your RPM (revenue per mille) from total earnings and pageviews. Free RPM calculator showing earnings per 1,000 views and per visitor.
  • Savings Account vs CD Calculator
    Calculate your Certificate of Deposit's value at maturity, total interest earned, and effective APY using compound interest. Free CD vs savings calculator.
  • Grams of Protein Per Meal Calculator
    Convert grams of protein, carbohydrates and fat into calories. Calculate total kcal and macro percentage breakdown using the 4-4-9 Atwater factors.
  • Fat Grams Per Pound Lost Calculator
    Find out how many calories you must burn to lose a pound of fat. Enter your goal weight loss and timeframe to get the total and daily calorie deficit.
  • Cricket Batting Average and Economy Rate Calculator
    Calculate a bowler's economy rate by dividing runs conceded by overs bowled. Instantly see runs per over and runs per ball for any cricket match.
  • Cloud Egress vs CDN Savings Calculator
    Project your month-end cloud bill from month-to-date spend. Calculate daily burn rate, forecast total spend, and check it against your monthly budget.
  • GPA to Letter Grade Calculator
    Convert a percentage score to a letter grade (A, B, C, D, F) and 4.0 GPA equivalent using the standard 10-point US grading scale.

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