All Parenting Tools
Baby Clothing Size Chart
Find the right baby clothing size by age, weight, and height. Compare sizes across popular brands like Carter's, H&M, Gap, and more.
Baby Feeding Calculator
Calculate how much breast milk or formula your baby needs by age and weight. Get per-feeding amounts, daily totals, and a sample feeding schedule from newborn through 12 months.
Baby Milestone Tracker
Track your baby's developmental milestones from 0-24 months. Check off motor, cognitive, social, and language milestones based on CDC/AAP guidelines with progress tracking and doctor-flag alerts.
Baby Name Popularity Checker
Look up any baby name to see its rank, frequency, peak decade, origin, and similar name suggestions. Top 200 names with 2024 data.
Baby Sleep Schedule by Age
Enter your baby's age and wake-up time to get a personalized daily sleep schedule with nap windows, wake windows, and suggested bedtime (0-24 months).
Baby Weight Percentile Calculator
See where your baby falls on the WHO growth chart. Enter age, weight, and sex to instantly calculate their weight-for-age percentile (0-36 months).
Cost of Raising a Child Calculator
Estimate the total cost of raising a child from birth to age 18 — broken down by category, income level, and region
Diaper Cost Calculator
Estimate total diaper costs from birth through potty training. Compare budget, mid-range, premium, and cloth diaper tiers with wipes included.
Formula Mixing Calculator
Calculate water-to-powder ratios for any baby formula brand. Enter your bottle size, select a brand, and get exact scoops, water amounts, and final volume. Supports batch prep for multiple bottles.
Parenting Calculators on FastTools help new and expecting parents navigate the numbers side of raising children. Every calculator runs entirely in your browser — your family's data never leaves your device.
From tracking your baby's growth percentile to estimating the total cost of raising a child, these free tools give you quick, reliable answers when you need them most.
Frequently Asked Questions
Are these parenting calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my family's data safe?
Absolutely. All calculations run locally in your browser. No personal or medical data is sent to any server.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.