Health & Wellness
Evidence-based health calculators using WHO, CDC, AAP and ICMR guidelines — built for Indian children.
Child & Teen BMI Calculator
Age and gender-adjusted BMI with WHO/CDC percentile reference. Ages 2–19.
Child Height Predictor
Predict your child's adult height from parents' heights using mid-parental height formula.
Fever & Paracetamol Dose
Safe paracetamol dose by child weight. Covers Calpol, Dolo, generic syrups — based on WHO guidelines.
Screen Time Calculator
Check if your child's screen time is within WHO and AAP recommended limits by age group.
Water Intake Calculator
Daily water needs for your child based on age, weight, activity, and climate. In ml and glasses.
Kids Sleep Calculator
Ideal bedtime and sleep hours by age — from newborns to teens. Visual sleep clock included.
Child Nutrition Planner
Daily calorie and nutrient targets with Indian food sources and a sample meal plan. ICMR RDA 2020.
Academic & Study
Tools that help students plan smarter, calculate results, and track academic progress.
CGPA ↔ Percentage Calculator
Convert CBSE CGPA to percentage (×9.5), percentage to CGPA, or calculate subject-wise grades.
Marks Percentage Calculator
Enter subject marks and get total %, grade, pass/fail status. Works for CBSE, ICSE, State Board.
Study Timetable Generator
Build a weighted weekly study schedule from your subjects, exam dates, and available hours.
Exam Countdown Timer
Live countdown to your exam with daily study hours breakdown across all subjects.
Reading Level Checker
Check if your child reads at, above, or below grade level. Based on WCPM fluency benchmarks.
Growth & Life Skills
Tools for tracking development, building financial habits, and planning your child's future.
Child Development Milestones
WHO developmental milestones by age across motor, language, social, and cognitive domains. Birth to 5 years.
Pocket Money & Savings
Teach children to save. Calculate how much they can save over weeks and months from pocket money.
Education Cost Estimator
Estimate your child's total education cost from pre-primary to postgraduate with inflation adjustment.
Tools that actually matter
Mahadev Maitri Foundation works with children and families across rural India. We see firsthand how parents struggle to access reliable, simple tools — whether it's understanding if their child's weight is healthy, knowing a safe paracetamol dose at 2 AM, or helping their teen plan exam revision.
These tools are our way of extending that support digitally — free, accurate, and usable even on basic smartphones with slow connections. No paywalls, no ads, no dark patterns.
About the Foundation →Common Questions
All 15 tools are free, forever
We build these tools to help Indian families — and run preschools in rural Rajasthan to give children a real start. Your donation keeps both going.