Children & Pets Calculators

44 professional health calculators • 100% free to use

Calculate height percentile, growth chart position, and head circumference. Track child BMI, baby weight milestones, dog food needs, and vaccination schedules.

All Children & Pets Calculators

Baby Food Calculator — Solids Introduction & Portions

Estimate age‑appropriate portions and plan meal frequency with the baby food cal...

Infant Growth Chart Calculator

Track weight, length, and head size with the infant growth chart calculator usin...

Baby Length Percentile Calculator — WHO Reference Guide

Check WHO length‑for‑age percentiles with the baby length percentile calculator....

Baby Milestone Calculator — Track Skills by Age & Stage

Use our baby milestone calculator to see what’s typical by corrected age. Explor...

Baby Weight Percentile Calculator — WHO Growth Guide

Use the baby weight percentile calculator to see WHO weight‑for‑age percentiles....

Boys Growth Chart Calculator: Height & Weight Percentiles

Free boys growth chart calculator using official CDC and WHO percentile data. Pl...

Breast Milk Storage Calculator — Safety & Expiry Guide

Calculate safe storage times for fresh or thawed milk with our breast milk stora...

Breastfeeding Calculator — Estimate Daily Ounces Needed

Estimate daily ounces by age and weight with the breastfeeding calculator. Get d...

Cat Age Calculator: Convert Cat Years to Human Years

Determine your cat's age in human years with the cat age calculator. Review life...

Cat Calorie Calculator — Free Daily Kcal & Feeding Guide

Use the free cat calorie calculator to estimate daily kcal needs by weight, age,...

Cat Weight Calculator

Free cat weight calculator to estimate your cat’s ideal weight using the body co...

Catch-Up Immunization Calculator — Vaccine Schedule Dates

Free catch-up immunization calculator for missed vaccine doses. Enter birth date...

Child Growth Calculator — Percentiles by Age and Sex

Use the child growth calculator to see height and weight percentiles by age and ...

Child Height Percentile Calculator — CDC/WHO Growth Charts

Use the child height percentile calculator to see height‑for‑age percentiles and...

Child Immunization Schedule Calculator — Expert Guide

Build a tailored plan with the child immunization schedule calculator. Review va...

Child Vaccine Schedule Calculator: CDC Timeline by Age

Free child vaccine schedule calculator to track CDC-recommended immunizations by...

Chocolate Toxicity Calculator for Pets: Dogs & Cats

Use our chocolate toxicity calculator for pets to estimate risk after dogs or ca...

Dog Age Calculator: Size‑Based Human Years Converter

Use the dog age calculator to convert dog years to human years with size‑based f...

Dog Calorie Calculator: Daily Kcal and Feeding Guide

Estimate your dog's daily calories by weight, age, neuter status, and activity w...

Dog Chocolate Calculator: Safe vs. Dangerous Amounts

Use the dog chocolate calculator to compare your dog's dose with safety threshol...

Dog Chocolate Toxicity Calculator: mg/kg Risk and Guidance

Use the dog chocolate toxicity calculator to estimate theobromine + caffeine mg/...

Dog Food Calculator — Cups, Grams, Calories Per Meal

Free dog food calculator converts daily calories to cups or grams. Enter kcal pe...

Dog Heat Cycle Calculator: Plan Fertile Window Dates

Use the dog heat cycle calculator to estimate proestrus and estrus, forecast fer...

Dog Pregnancy Calculator: Due Date and Gestation Timeline

Use our dog pregnancy calculator to predict a due date and see a stage‑by‑stage ...

Dog Size Calculator: Adult Weight, Height, and Growth

Use the dog size calculator to estimate adult weight and size class from a puppy...

Dog Weight Calculator

Use our dog weight calculator to estimate ideal weight from body condition score...

Dog Years Calculator – Convert to Human Years & Chart

Convert dog years to human years with our dog years calculator. Enter years and ...

Dog Years to Human Years Calculator: Breed‑Specific Guide

Convert dog years to human years with breed and size adjustments using the dog y...

Formula Calculator — Feeding Guide, Schedule & Safety

Plan bottle size per feed and daily totals with the formula calculator based on ...

Girls Growth Chart Calculator: Height & Weight Percentiles

Free girls growth chart calculator using CDC and WHO percentile data. Plot your ...

Growth Calculator — Child Height Percentiles & Trends

Get a quick snapshot with the growth calculator. Enter a child’s age, sex, and h...

Growth Chart Calculator — Child Percentiles by Age

Free growth chart calculator plots child height and length percentiles by age an...

Head Circumference Percentile Calculator — WHO Chart

Free head circumference percentile calculator with WHO growth chart. Enter age (...

Height Calculator — Child Height Percentile by Age (CDC)

Free height calculator finds your child's height-for-age percentile and z-score ...

Height Percentile Calculator — CDC/WHO Growth Charts

Free height percentile calculator with CDC/WHO growth charts. Enter age, sex, an...

How Much Chocolate Will Kill a Dog Calculator: Lethal Dose

Use the how much chocolate will kill a dog calculator for instant risk assessmen...

Human Years to Dog Years Calculator: Quick Conversion

Convert human years to dog years with the human years to dog years calculator. R...

Newborn Feeding Calculator — 0–12 Week Feeding Guide

Plan the first weeks with the newborn feeding calculator. Estimate ounces per fe...

Pet BMI Calculator: Body Condition Score (BCS) Guide

Assess body condition with the pet BMI calculator using a simple BCS scale. Revi...

Pumped Milk Calculator — Bottles, Feeds & Stash Plan

Use the pumped milk calculator to estimate daily intake, plan bottles for time a...

Puppy Weight Calculator — Estimate Adult Size Accurately

Estimate your puppy's adult size with the puppy weight calculator. Predict growt...

Toddler Growth Percentile Calculator — Ages 2–5 Guide

Track ages 2–5 with the toddler growth percentile calculator for height, weight,...

Vaccination Schedule Calculator — Personalized Child Plan

Use our vaccination schedule calculator to build a child vaccine timeline. Enter...

Weight Percentile Calculator — Compare by Age and Sex

Use the weight percentile calculator to see rank by age and sex. Enter age, sex,...

Total Tools

44

100% Private

Secure

Instant

Results

Trusted

Worldwide

Why Use Our Children & Pets Calculators?

Our children and pets calculator collection features 44 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?

Growth chart percentiles compare your child's measurements to a reference population of the same age and sex. For example, the 75th percentile for height means your child is taller than 75% of children the same age. Percentiles between the 5th and 95th are generally considered normal. Our calculator uses official WHO and CDC growth chart data.

How can I predict my child's adult height?

Our height calculator uses the mid-parental height method: for boys, add both parents' heights plus 13 cm and divide by 2; for girls, add both parents' heights minus 13 cm and divide by 2. The Khamis-Roche method, which also factors in the child's current height and weight, provides a more precise estimate.

What is a normal head circumference for babies?

Average head circumference at birth is about 33-36 cm. It grows roughly 2 cm per month in the first 3 months, then slows. Our head circumference percentile calculator plots your baby's measurement against WHO growth standards to check whether growth is tracking normally.

How much food should I feed my dog per day?

Daily food needs depend on your dog's weight, age, breed size, and activity level. A general guideline is 2-3% of body weight for raw diets or following the feeding guide on commercial food labels. Our dog food calculator provides a personalized recommendation in cups or grams based on your dog's specific profile.

When does my child need catch-up immunizations?

If your child missed scheduled vaccines, our catch-up immunization calculator generates a personalized schedule based on current age, previously received doses, and CDC catch-up guidelines. It shows which vaccines are due, minimum intervals between doses, and priority order for getting back on track.

Explore More Health Calculators

Discover our complete collection of 280 health calculators across 9 categories