Most Popular Children & Pets Calculators
Height Percentile Calculator
Free height percentile calculator with CDC/WHO growth charts. Enter age, sex, and height to see your percentile, z-score, and reference ranges instantly.
Growth Chart Calculator
Free growth chart calculator plots child height and length percentiles by age and sex using WHO and CDC data. See z-scores, percentile bands, and export charts.
Head Circumference Percentile Calculator
Free head circumference percentile calculator with WHO growth chart. Enter age (0‑5 years), sex, and measurement to get percentile, z‑score, and visual chart.
Child Height Percentile Calculator
Use the child height percentile calculator to see height‑for‑age percentiles and z‑scores from CDC/WHO charts. Enter age, sex, height and track trends.
Height Calculator
Free height calculator finds your child's height-for-age percentile and z-score using CDC growth chart data. Enter age, sex, and height for instant results.
Catch-Up Immunization Calculator
Free catch-up immunization calculator for missed vaccine doses. Enter birth date and doses to get next eligible dates using CDC minimum age and interval rules.
All Children & Pets Calculators
Apgar Score Calculator
Use the Apgar score calculator to rate a newborn at 1 and 5 minutes across heart rate, breathing, muscle tone, reflexes, and skin color on a 0 to 10 scale.
Baby Food Calculator
Estimate age‑appropriate portions and plan meal frequency with the baby food calculator. Log new foods, track allergens, and export a simple weekly menu.
Infant Growth Chart Calculator
Track weight, length, and head size with the infant growth chart calculator using WHO percentiles. See trends on clear charts and compare age-based progress.
Baby Length Percentile Calculator
Check WHO length‑for‑age percentiles with the baby length percentile calculator. Input age, sex, and length to see your percentile and track growth trends.
Baby Milestone Calculator
Use our baby milestone calculator to see what’s typical by corrected age. Explore early, typical, and later windows for motor, language, and cognitive skills.
Baby Weight Percentile Calculator
Use the baby weight percentile calculator to see WHO weight‑for‑age percentiles. Enter age, sex, and weight to get your percentile, z‑score, and tips.
Ballard Score Calculator
The Ballard score calculator estimates a newborn's gestational age in weeks from neuromuscular and physical maturity signs when due dates are uncertain.
Boys Growth Chart Calculator
Free boys growth chart calculator using official CDC and WHO percentile data. Plot your son's height and weight by age from birth to 20 and get z-scores.
Breast Milk Storage Calculator
Calculate safe storage times for fresh or thawed milk with our breast milk storage calculator. See fridge/freezer expiry dates, cooler limits, and labels.
Breastfeeding Calculator
Estimate daily ounces by age and weight with the breastfeeding calculator. Get day/night splits, frequency tips, and a simple plan you can adjust over time.
Cat Age Calculator
Determine your cat's age in human years with the cat age calculator. Review life stages, context, care guidelines, and helpful tips in a simple format.
Cat BMI Calculator
The cat BMI calculator estimates your cat's feline body mass index from rib cage and leg measurements to flag underweight, ideal, or overweight body condition.
Cat Calorie Calculator
Use the free cat calorie calculator to estimate daily kcal needs by weight, age, and activity. Get feeding portions in grams, cups, or cans for your cat.
Cat Weight Calculator
Free cat weight calculator to estimate your cat’s ideal weight using the body condition score. Check if your cat is overweight and create a safe plan.
Catch-Up Immunization Calculator
Free catch-up immunization calculator for missed vaccine doses. Enter birth date and doses to get next eligible dates using CDC minimum age and interval rules.
Child Growth Calculator
Use the child growth calculator to see height and weight percentiles by age and sex. Enter age in years and months, add measurements, and track trends.
Child Height Percentile Calculator
Use the child height percentile calculator to see height‑for‑age percentiles and z‑scores from CDC/WHO charts. Enter age, sex, height and track trends.
Child Immunization Schedule Calculator
Build a tailored plan with the child immunization schedule calculator. Review vaccines, minimum intervals, and upcoming doses with a printable checklist.
Child Vaccine Schedule Calculator
Free child vaccine schedule calculator to track CDC-recommended immunizations by age. Enter your child's birthdate to see due, overdue, and upcoming vaccines.
Chocolate Toxicity Calculator for Pets
Use our chocolate toxicity calculator for pets to estimate risk after dogs or cats eat chocolate. Enter species, weight, type, and amount for clear guidance.
Corrected Age Calculator for Premature Babies
Use the corrected age calculator for premature babies to adjust a preemie's age for weeks of prematurity when tracking growth and developmental milestones.
Dog Age Calculator
Use the dog age calculator to convert dog years to human years with size‑based factors. Enter years and months, choose size, and get life stage tips for care.
Dog Calorie Calculator
Estimate your dog's daily calories by weight, age, neuter status, and activity with our dog calorie calculator. Convert kcal to cups, grams, and cans.
Dog Chocolate Calculator
Use the dog chocolate calculator to compare your dog's dose with safety thresholds by chocolate type. Get instant safe/unsafe indicators and action steps.
Dog Chocolate Toxicity Calculator
Use the dog chocolate toxicity calculator to estimate theobromine + caffeine mg/kg by chocolate type and weight. See risk, next steps, and when to call a vet.
Dog Food Calculator
Free dog food calculator converts daily calories to cups or grams. Enter kcal per cup, set treats, and get per-meal portions for any kibble or wet food.
Dog Heat Cycle Calculator
Use the dog heat cycle calculator to estimate proestrus and estrus, forecast fertile days, and plan the next heat window with mobile timelines and reminders.
Dog Pregnancy Calculator
Use our dog pregnancy calculator to predict a due date and see a stage‑by‑stage gestation timeline. Plan care with ultrasound/X‑ray timing, reminders, and tips.
Dog Size Calculator
Use the dog size calculator to estimate adult weight and size class from a puppy’s age and weight, or classify by weight or height. See growth projections.
Dog Weight Calculator
Use our dog weight calculator to estimate ideal weight from body condition score. See a safe weekly change target, timeline to goal, and clear tips you can use.
Dog Years Calculator
Convert dog years to human years with our dog years calculator. Enter years and months, choose size, and get life‑stage tips with a quick, easy‑to‑scan chart.
Dog Years to Human Years Calculator
Convert dog years to human years with breed and size adjustments using the dog years to human years calculator. See life stages and practical care tips.
Formula Calculator
Plan bottle size per feed and daily totals with the formula calculator based on age and weight. Build a safe, predictable schedule with clear prep tips.
Girls Growth Chart Calculator
Free girls growth chart calculator using CDC and WHO percentile data. Plot your daughter's height and weight by age from birth to 20 and get z-scores.
Growth Calculator
Get a quick snapshot with the growth calculator. Enter a child’s age, sex, and height to see percentile rank, z‑score, and trend cues using WHO/CDC data.
Growth Chart Calculator
Free growth chart calculator plots child height and length percentiles by age and sex using WHO and CDC data. See z-scores, percentile bands, and export charts.
Head Circumference Percentile Calculator
Free head circumference percentile calculator with WHO growth chart. Enter age (0‑5 years), sex, and measurement to get percentile, z‑score, and visual chart.
Height Calculator
Free height calculator finds your child's height-for-age percentile and z-score using CDC growth chart data. Enter age, sex, and height for instant results.
Height Percentile Calculator
Free height percentile calculator with CDC/WHO growth charts. Enter age, sex, and height to see your percentile, z-score, and reference ranges instantly.
How Much Chocolate Will Kill a Dog Calculator
Use the how much chocolate will kill a dog calculator for instant risk assessment. Features LD50-style estimates, risk tiers, and immediate veterinary steps.
Human Years to Dog Years Calculator
Convert human years to dog years with the human years to dog years calculator. Review reverse mapping, life stage comparison, and helpful care context.
Mid-Parental Height Calculator
Free mid-parental height calculator that predicts a child's adult height from the mother's and father's heights, with a target range in cm or feet and inches.
Newborn Feeding Calculator
Plan the first weeks with the newborn feeding calculator. Estimate ounces per feed, set day and night schedules, and adjust timing as growth and sleep change.
Pediatric Maintenance Fluid Calculator (4-2-1 Rule)
Free pediatric maintenance fluid calculator using the Holliday-Segar 4-2-1 rule — get hourly IV rates and daily volumes from a child's weight in kg or lb.
Pet BMI Calculator
Assess body condition with the pet BMI calculator using a simple BCS scale. Review categories, see guidance for weight goals, and track progress over time.
Predicted Adult Height Calculator
This predicted adult height calculator estimates how tall a child will be as an adult using current height, age, sex, and parental height for boys and girls.
Pumped Milk Calculator
Use the pumped milk calculator to estimate daily intake, plan bottles for time away, compare pumping output, and set freezer stash goals with clear targets.
Puppy Weight Calculator
Estimate your puppy's adult size with the puppy weight calculator. Predict growth from early weigh-ins, track milestones, and compare with breed ranges.
Toddler Growth Percentile Calculator
Track ages 2–5 with the toddler growth percentile calculator for height, weight, and BMI‑for‑age. Enter details to see percentiles and a simple growth summary.
Vaccination Schedule Calculator
Use our vaccination schedule calculator to build a child vaccine timeline. Enter a birthdate to see recommended doses, due windows, and catch‑up tips.
Weight-for-Length Percentile Calculator
Free weight for length percentile calculator using WHO growth standards to check if your baby is proportional, wasted, or overweight from birth to age 2.
Weight Percentile Calculator
Use the weight percentile calculator to see rank by age and sex. Enter age, sex, and weight to view your percentile and z‑score, with concise guidance.
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Why Use Our Children & Pets Calculators?
Our children and pets calculator collection features 52 tools for plotting height and weight percentiles on growth charts, calculating head circumference percentiles, predicting adult height, tracking baby and toddler development milestones, planning catch-up immunization schedules, calculating dog food portions, and estimating cat calorie needs. Pediatric tools use WHO and CDC growth chart data, while pet calculators follow veterinary nutrition guidelines.
Who Are These Calculators For?
Parents monitoring their child's growth and development, pediatricians and family doctors using growth chart references, and pet owners ensuring proper nutrition for their dogs and cats. Our height percentile calculator and growth chart calculator are the most frequently used tools in this category.
How Our Calculators Work
Enter your child's age, height, weight, or head circumference, and the calculator plots their measurements against WHO (0-2 years) or CDC (2-20 years) growth chart data to show exact percentiles. For pets, enter the animal's weight, age, breed size, and activity level to receive feeding and calorie recommendations based on veterinary standards.
Key Benefits
- Medical-grade accuracy based on WHO and CDC guidelines
- Instant results with detailed explanations and recommendations
- 100% private — all calculations run locally in your browser
- No registration, no personal data collected
Frequently Asked Questions
How do growth chart percentiles work?
How can I predict my child's adult height?
What is a normal head circumference for babies?
How much food should I feed my dog per day?
When does my child need catch-up immunizations?
Explore More Health Calculators
Discover our complete collection of 304 health calculators across 9 categories