Formula Mixing Calculator

Enter your target bottle size and your formula’s ratio (e.g., 1 scoop per 60 ml or per 2 fl oz) to get exact water and scoop amounts.

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About the Formula Mixing Calculator

The Formula Mixing Calculator helps parents quickly determine the exact water and scoop amounts needed for any bottle size. It works with both milliliters (ml) and fluid ounces (fl oz) and supports unusual bottle sizes, making it easier to avoid mistakes when preparing formula.

How It Works

Choose your preferred unit (ml or fl oz)
Enter your target bottle size
Input the formula ratio as printed on the tin (e.g., 1 scoop per 60 ml or 1 scoop per 2 fl oz)
Get the correct water amount and number of scoops (rounded to the nearest level scoop)

Quick Reference Examples

Ratio (from tin)	Example conversions
1 scoop / 60 ml	120 ml → 2 scoops; 180 ml → 3
1 scoop / 30 ml	120 ml → 4 scoops; 150 ml → 5
1 scoop / 2 fl oz	4 oz → 2 scoops; 6 oz → 3
1 scoop / 1.5 fl oz	4.5 oz → 3 scoops; 6 oz → 4

Safety Tips

Always measure with level scoops (no heaping)
Follow the manufacturer’s mixing instructions exactly
If your bottle size doesn’t divide evenly, use the closest safe match (the calculator will suggest)

This tool performs math only and helps reduce mixing errors. The correct ratio is always defined by your formula brand.

Important: Never alter the water-to-powder ratio. For health and nutrition guidance, follow your pediatrician’s advice.