Diaper Calculator
Calculate daily, weekly, and monthly diaper needs and costs based on baby's age and diaper prices.
1. Diapers Per Day (Age-Based)
• 0-1 month: 10-12 diapers/day
• 1-3 months: 8-10 diapers/day
• 3-6 months: 7-8 diapers/day
• 6-12 months: 6-7 diapers/day
• 12-18 months: 5-6 diapers/day
• 18-24 months: 4-5 diapers/day
• 24+ months: 3-4 diapers/day
2. Weekly Usage
= Diapers Per Day × 7
3. Monthly Usage
= Diapers Per Day × 30
4. Cost Calculations
Daily Cost = Diapers Per Day × Cost Per Diaper
Weekly Cost = Weekly Usage × Cost Per Diaper
Monthly Cost = Monthly Usage × Cost Per Diaper
Yearly Cost = Monthly Cost × 12
5. Size Recommendations
Based on baby's age and typical weight ranges
Input:
• Baby Age: 4 months
• Cost Per Diaper: $0.25
Results:
• Diapers Per Day: 8 diapers
• Weekly Needs: 56 diapers
• Monthly Needs: 240 diapers
• Daily Cost: $2.00
• Weekly Cost: $14.00
• Monthly Cost: $60.00
• Yearly Cost: $720.00
• Recommended Size: Size 2 (12-18 lbs)
Bulk Buying Tip: Buy a month's supply (240 diapers) to save 15-20% vs. small packs!
How many diapers does a newborn use per day?
Newborns (0-1 month) use 10-12 diapers per day on average, sometimes up to 14. Expect 8-10 wet diapers and 3-4 dirty diapers daily. Breastfed babies often have more frequent bowel movements. By 1 month, usage drops to 8-10 diapers/day. By 6 months: 6-8 diapers/day. By 12 months: 5-6 diapers/day. Total first year: ~2,500-3,000 diapers. Stock up on newborn size but don't overbuy - babies grow quickly!
What diaper sizes do I need and when?
Typical progression: Newborn (up to 10 lbs, 0-1 month), Size 1 (8-14 lbs, 1-4 months), Size 2 (12-18 lbs, 4-7 months), Size 3 (16-28 lbs, 7-12 months), Size 4 (22-37 lbs, 12-24 months), Size 5 (27+ lbs, 24+ months). Babies vary - some skip Newborn size, others need it for weeks. Buy 1-2 boxes of each size initially, then stock up. Overlap sizes during transitions. Leaks/red marks indicate wrong size.
How can I reduce diaper costs?
Cost-saving strategies: Buy in bulk (warehouse stores, Amazon Subscribe & Save 20% off), use store brands (often same quality, 30-50% cheaper), sign up for rewards programs, use coupons and cash back apps, consider cloth diapers (higher upfront cost but save $1,000+ long-term), buy larger boxes (lower per-diaper cost), stock up during sales, accept hand-me-downs if unopened. Average disposable cost: $70-80/month = $2,000-2,500 total. Cloth diapers: $800-1,000 total.
Should I use cloth or disposable diapers?
Disposable pros: Convenient, absorbent, no laundry, travel-friendly. Cons: Expensive ($2,000-2,500 total), environmental impact, chemicals. Cloth pros: Save $1,000+, eco-friendly, fewer chemicals, cute designs. Cons: Upfront cost ($500-800), laundry time, learning curve, bulkier. Hybrid approach: Cloth at home, disposable for travel/night/daycare. Cloth works best if: You have washer/dryer, don't mind laundry, staying home mostly. Choose based on budget, lifestyle, and values.
🔗 Related Calculators
📐 Formula
1. Diapers Per Day (Age-Based)
• 0-1 month: 10-12 diapers/day
• 1-3 months: 8-10 diapers/day
• 3-6 months: 7-8 diapers/day
• 6-12 months: 6-7 diapers/day
• 12-18 months: 5-6 diapers/day
• 18-24 months: 4-5 diapers/day
• 24+ months: 3-4 diapers/day
2. Weekly Usage
= Diapers Per Day × 7
3. Monthly Usage
= Diapers Per Day × 30
4. Cost Calculations
Daily Cost = Diapers Per Day × Cost Per Diaper
Weekly Cost = Weekly Usage × Cost Per Diaper
Monthly Cost = Monthly Usage × Cost Per Diaper
Yearly Cost = Monthly Cost × 12
5. Size Recommendations
Based on baby's age and typical weight ranges
📝 Example Calculation
Input:
• Baby Age: 4 months
• Cost Per Diaper: $0.25
Results:
• Diapers Per Day: 8 diapers
• Weekly Needs: 56 diapers
• Monthly Needs: 240 diapers
• Daily Cost: $2.00
• Weekly Cost: $14.00
• Monthly Cost: $60.00
• Yearly Cost: $720.00
• Recommended Size: Size 2 (12-18 lbs)
Bulk Buying Tip: Buy a month's supply (240 diapers) to save 15-20% vs. small packs!