What is this?
A diaper size calculator recommends the correct diaper size based on your baby's weight and age. Diaper sizes range from Preemie (< 6 lbs) to Size 6 (35-45 lbs), with overlapping weight ranges. Weight is more important than age for proper sizing, as babies grow at different rates.How to use
Enter your baby's current weight in pounds and select age range. If experiencing fit issues (leaks, red marks, gaps), select the problem to get sizing adjustment recommendations. The calculator provides the recommended size, brand-specific notes, cost estimates, and signs it's time to size up.Tips
- Weight is more important than age for sizing
- Newborn (N): 5-10 lbs, 0-2 months
- Size 1: 8-14 lbs, 0-4 months
- Size 2: 12-18 lbs, 2-8 months
- Size 3: 16-28 lbs, 5-20 months (used longest)
- Size 4: 22-37 lbs, 18-36 months
- Size 5: 27-41 lbs, 2-4 years
- Size 6: 35+ lbs, 3-5 years (potty training)
- Pampers run smaller/narrower than Huggies
- Red marks = size up immediately
- Leaks = too small OR too saturated (try overnight)
- Tabs should meet on sides, not overlap or gap
- Buy overlap sizes when transitioning (12-18 lbs = try 2 and 3)
- Overnight diapers: Size up for extra absorbency
- Cost: $60-80/month average, $0.20-0.30 per diaper
