Key features
- Accepts multiple circumference or skinfold inputs to estimate body fat percentage.
- Explains what each range means using student-friendly language.
- Helpful for PE or health classes discussing composition trends without logging data.
EduFun tool index
Search engines and caregivers can see every module we offer, from language drills to finance calculators.
- Italian Verb Conjugator. Master every regular Italian verb form with instant grading, hints, and streak analytics.
- Fractions Coach. Simplify, compare, and compute fractions with animated hints and keyboard shortcuts.
- Alfaorder Alphabet Challenge. Drag letters into alphabetical order with multilingual alphabets and timed rounds.
- Pitagoric Table Game. Hide products inside multiplication tables to build confident number fluency.
- GeoGenius Map Challenge. Guess the country from zoomed-in map views with streak tracking and hints.
- BMI Calculator. Estimate body mass index (BMI), healthy weight range, and classification with metric or imperial inputs.
- BMR Calculator. Calculate basal metabolic rate and daily calorie needs using common formulas and activity levels.
- Calorie Intake Planner. Estimate maintenance calories, apply gain/loss goals, and get suggested macros for each day.
- Body Fat %. Estimate body fat using the U.S. Navy method and interpret categories with metric or imperial measurements.
- Pregnancy Due Date. Project an estimated due date, gestational age, and trimester timeline from the last period date.
- Reaction Time Tester. Measure visual reflexes with a quick tap test, using repeatable trials and average timing.
- BSA & Dosage. Calculate body surface area (Mosteller) and practice dose-scaling math using m^2.
- Compound Interest. Project growth of savings with compound interest over time, including contributions and compounding frequency.
- Loan Payment. Estimate monthly payments and amortization schedules, including total interest and payoff timeline.
- Credit Card Payoff. Estimate payoff date, total interest, and time saved when adding extra monthly payment toward credit card debt.
- Debt-to-Income (DTI). Calculate front-end and back-end debt-to-income ratios from housing and recurring debt compared to gross monthly income.
- Emergency Fund Planner. Set a target cushion based on essential monthly expenses and estimate how long it takes to fully fund it.
- Break-Even Calculator. Find break-even units, break-even revenue, and units needed for a target profit from costs and selling price.
- Savings Goal Planner. See how long it takes to reach a target with monthly contributions and optional interest.
- Mortgage Calculator. Estimate principal and interest payments based on price, down payment, term, and rate for quick comparisons.
- Paycheck Calculator. Forecast take-home pay after estimated taxes and deductions, with a clear gross vs net breakdown.
- Tip & Split. Split a bill with customizable tip percentages and per-person totals for percentage and rounding practice.
- Savings Planner. Project future balance with starting cash, contributions, and interest, with an easy timeline summary.
- ROI Calculator. Find net gain and return on investment in dollars and percent for quick side-by-side comparisons.
- Simple Interest. Calculate interest and total amount without compounding, with a simple formula breakdown.
- Markup & Margin. Compare profit margin and markup from cost and price for business-math practice.
- Inflation (Real vs Nominal). Estimate future costs and purchasing power given an inflation rate, comparing real vs nominal values.
- Sales Tax Calculator. Add tax to a pre-tax price or extract tax from a tax-inclusive total with a clear line-item breakdown.
- Discount Calculator. Calculate markdown amount, final price, and effective savings after discount, coupon, and optional sales tax.
- Currency Exchange Calculator. Convert between currencies with a custom exchange rate, including inverse rate and side-by-side totals.
- Percentage Change. Find percentage increase or decrease between two values with clear formula steps.
- GPA Calculator. Convert course grades and credits into a semester GPA on the standard 4.0 scale.
- Final Grade Calculator. Calculate the exam score needed on a weighted final to reach a target overall course grade.
- Fraction Simplifier. Reduce fractions to lowest terms with step-by-step explanation and GCD work shown.
- Quadratic Solver. Solve ax^2 + bx + c with roots, discriminant steps, and real or complex solutions.
- Circle Calculator. Get diameter, circumference, and area for any radius, with formulas for geometry practice.
- Prime Factorization. Decompose integers into primes, count divisors, and label number types with clear factor output.
- GCD, LCM & Ratio. Compute the greatest common divisor, least common multiple, and simplified ratios for lists of integers.
- Permutations & Combinations. Calculate nCr and nPr for counting problems, probability, and statistics practice.
- Triangle Solver. Solve sides, angles, and area for SSS, SAS, ASA, or AAS sets with instant validation and clear results.
- Pythagorean Explorer. Check right triangles and browse classic and primitive triples for quick lesson examples.
- Area & Volume Builder. Compute area/perimeter and volume/surface area across common shapes with quick formulas.
- Descriptive Stats. Find mean, median, mode, range, variance, and spread for any data set, with quick summaries.
- Z-Score & Percentile. Convert raw scores to z-scores and percentile ranks for normal distributions, with interpretation-ready output.
- Binomial Probability. Compute exact and cumulative probabilities for repeated trials, including at-least and at-most results.
- Normal Probability. Find the probability between bounds for any normal distribution, including tail areas and z-scores.
- Dice Probability. Get exact odds for rolling any sum with custom dice and sides, useful for games and probability lessons.
- Spread & Deviation. Compute mean absolute deviation, variance, and standard deviation for quick dataset summaries.
- Linear Regression. Fit a best-fit line, correlation coefficient, and predictions for paired data in labs and projects.
- Unit Converter. Convert common length, mass, and temperature units across classroom-friendly measurement systems.
- Speed, Distance & Time. Solve speed = distance / time with unit conversions and rearranged formulas for quick checks.
- Half-Life Decay. Estimate decay using half-life or decay constant, with remaining quantity over time.
- Ohm's Law. Solve for voltage, current, or resistance from any two known values, with units and formula reminders.
- Fuel Cost Calculator. Estimate trip fuel usage and cost from distance, vehicle efficiency, and fuel price across common unit systems.
- Coordinate Tools. Convert decimal degrees to/from DMS and compute great-circle distance, bearing, and midpoint for maps.
- AI Token Cost. Estimate cost per request plus monthly and annual spend from token usage and per-million pricing.
- Words Per Minute. Run a quick typing test to measure speed and accuracy, with timed passages and repeatable practice.
- Age Calculator. Find exact age, next birthday, and total days lived between two dates, with calendar-friendly results.
- Time Zone Comparator. Compare two time zones and plan shared meeting windows with offsets and suggested schedules.
- Date Duration Calculator. Count total days, weeks, weekdays, and weekend days between two dates with optional inclusive counting.