Diaper Size Guide

Find the perfect diaper size for your baby by entering their weight. View the complete diaper size chart from preemie to size 7.

42.8Kuses
7.5/10(80)

Complete Diaper Size Chart

SizeWeight (lbs)Weight (kg)Age RangePer Day
PreemieUp to 6 lbsUp to 2.7 kgPremature8-12
Newborn (N)Up to 10 lbsUp to 4.5 kg0-1 month8-12
Size 18-14 lbs3.6-6.4 kg0-4 months8-10
Size 212-18 lbs5.4-8.2 kg2-7 months8-10
Size 316-28 lbs7.3-12.7 kg5-24 months6-8
Size 422-37 lbs10-16.8 kg18-36 months6-8
Size 527+ lbs12.2+ kgOver 3 years5-7
Size 635+ lbs15.9+ kgOver 3 years5-7
Size 741+ lbs18.6+ kgOver 4 years4-6

How to Choose the Right Diaper Size

Diaper size is primarily determined by your baby's weight, not age. Signs you need to size up include frequent leaks, red marks on skin, difficulty fastening tabs, and the diaper looking too snug. Always check the weight range on the package.

Features

  • Weight-based size recommendation
  • Supports lbs and kg
  • Complete size chart from Preemie to Size 7
  • Daily diaper count estimates

Disclaimer: This tool is provided β€œas is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser β€” we do not store, transmit, or access your data. Use at your own risk.