Educational

  • TIMI Risk Score for UA/NSTEMI Calculator
    Calculate the TIMI Risk Score for unstable angina and NSTEMI by summing 7 clinical risk factors to estimate 14-day adverse event risk.
  • Order of Operations Calculator
    Evaluate any math expression using PEMDAS/BODMAS order of operations — parentheses, exponents, multiplication, division, addition, subtraction.
  • Hardy-Weinberg Equilibrium Calculator
    Calculate Hardy-Weinberg genotype frequencies (p², 2pq, q²) from one allele frequency. Find p, q and population genotype distribution instantly.
  • BMI Calculator
    Free BMI calculator: enter weight in kg and height in cm to instantly find your Body Mass Index and weight category (underweight, normal, overweight, obese).
  • Cube Number Calculator (n³)
    Free cube number calculator. Enter any number to instantly find its cube (n³ = n × n × n). Works with whole numbers, decimals, and negatives.
  • Square Number Calculator
    Square any number instantly with this free n² calculator. Enter a value and get its square (n × n), works for decimals and negatives too.
  • Is It a Multiple Calculator
    Check if one number is a multiple of another. Enter N and D to instantly see if N is divisible by D, with quotient and remainder shown.
  • QBR Calculator (NCAA Passer Rating)
    Calculate NCAA college football QBR / passer rating from completions, attempts, yards, touchdowns and interceptions using the official formula.
  • Tennis Rating (UTR-Style) Calculator
    Calculate win percentage from a sports win-loss record. Supports ties using the standard (Wins + 0.5×Ties) / Games formula. Free and instant.
  • Weighted GPA Calculator (5.0 Scale)
    Calculate your weighted GPA on a 5.0 scale. Honors/AP courses earn extra points (A=5.0) while regular courses use the standard 4.0 scale.
  • PHQ-9 Depression Score Calculator
    Calculate your PHQ-9 depression screening score (0–27) from the 9 standard items and see the matching severity band, from minimal to severe.
  • Gleason Score & Grade Group Calculator
    Calculate the prostate cancer Gleason score from primary and secondary patterns and convert it to the ISUP/WHO Grade Group (1–5).
  • Plus/Minus GPA Calculator
    Calculate your GPA on a plus/minus 4.0 scale. Enter letter grades (A, A-, B+, ...) and credits to get a credit-weighted grade point average.
  • GPA from Number of Each Letter Grade Calculator
    Compute your GPA on a 4.0 scale by entering how many A, B, C, D and F grades you earned. Fast, free grade distribution GPA calculator.
  • Required Final Exam Percentage Calculator
    Find out the exact percentage you need on your final exam to reach your target course grade, based on your current grade and the final's weight.
  • GPA Scale Converter
    Convert a GPA between any two grading scales — 4.0, 5.0, 10.0, or 100 — instantly. Enter your GPA, current scale max, and target scale max.
  • Percentage of a Total Calculator
    Find out what percent X is of Y instantly. Enter a part and a total to calculate the percentage using % = (X / Y) × 100. Free and easy.
  • Surface Area of a Cylinder Calculator
    Calculate the total surface area of a cylinder from its radius and height using A = 2πr² + 2πrh. Free, instant, with lateral and base areas shown.
  • Volume of a Cube Calculator
    Calculate the volume of a cube instantly with V = a³. Enter the side length to get volume, surface area, and space diagonal in any units.
  • Surface Area of a Sphere Calculator
    Calculate the surface area of a sphere instantly with A = 4πr². Enter the radius to get surface area, diameter, and volume. Free and easy to use.
  • APFT 2-Mile Run Score Calculator
    Estimate your US Army APFT/IPFU 2-mile run score (0-100) by age group and gender. Enter your run time to get points instantly.
  • APFT Sit-Up Score Calculator
    Calculate your US Army APFT sit-up score (0–100 points) from reps and age band. Find out if you pass the 2-minute sit-up event.
  • APFT Push-Up Score Calculator (US Army)
    Estimate your US Army APFT push-up score (0–100 points) from reps, age and gender. See points per rep, reps for a max score, and the pass threshold.
  • Odds Ratio Calculator
    Score the 21-item Beck Depression Inventory (BDI-II). Add each item (0-3) for a total of 0-63 and see your severity band: minimal, mild, moderate or severe.

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