Milk Storage Bag Calculator

We count one bag for each pumping session you plan to freeze. If one session has more than 6 oz to freeze, we split it into enough bags to stay within that limit. We multiply bags per session by sessions per day and planned days, add your chosen percentage of extra bags (rounded up), then subtract unused bags at home. Any bags still needed are rounded up to Cubtale packs of 100.

For example: three sessions a day, with 3 oz to freeze from each session, for 30 days uses 90 bags. Adding 10% gives 99 bags. With no unused bags at home, that means one pack of 100, with one bag left over.

This tool estimates storage bags for milk you already plan to freeze. To plan milk for days apart, use the Return-to-Work Milk Planner. If you have a freezer goal and a timeline in mind, use the Freezer Stash Goal Calculator.

Use a typical amount to freeze per session and the number of sessions you plan to freeze each day. If session amounts vary, your count may differ, especially when a session exceeds 6 oz and needs an additional bag. Update the estimate as your routine changes.

Each session you freeze uses its own bag, even when the bag is not full. We don’t combine milk from separate sessions to fill a bag. For example, two sessions with 2 oz to freeze from each use two bags. One session with 8 oz to freeze also uses two bags because it exceeds the 6 oz limit.

Count empty, unused storage bags you can use for this plan. Leave out bags already filled with milk. If you already have enough, the calculator shows zero bags to buy and confirms that your unused bags cover the plan.

Extra bags are optional. They give you a little flexibility for a damaged bag, a spill, or an extra portion. Set the percentage to zero if you only want the bags needed for your planned milk. The calculator rounds extra bags up to a whole bag.

This estimate counts one bag per session, up to 6 oz. A session with more milk to freeze is split across additional bags. For example, a 7 oz session uses two bags. Follow the bag’s fill instructions and leave room for expansion.

If you prefer smaller portions, you may use more bags than this estimate. You can use Cubtale’s baby feeding tracker to review your baby’s usual bottle amounts.

Each pack includes 100 Cubtale Breast Milk Storage Bags and 100 QR milk labels. The calculator recommends whole packs of 100 and shows how many bags remain after your plan, extra allowance, and unused bags already at home.

Explore Cubtale Breast Milk Storage Bags and labels. You can also use the labels with Cubtale’s milk inventory tools to keep track of your stash.

For storage times, thawing, and handling, visit our breast milk storage guide. Follow your bag’s instructions and any guidance from your baby’s care team.

Share the Cubtale app with your partner or caregiver so everyone can follow feeding patterns and see the daily snapshot. Use the average comparison chart to compare logged amounts over time, then update your plan as your routine changes.

Pair it with Cubtale’s QR-labeled milk bags to log milk as it is stored and used, see what is available, and know which bag to reach for next.

Explore our pumping schedule guide for ideas to discuss as you build a routine around your day. If you are considering power pumping, our power pumping guide explains the approach. These tools calculate the plan you enter; they do not choose a pumping routine or predict milk supply.

Visit our Milk Stash Planner to choose between planning milk for your return to work, building toward a freezer goal, and calculating storage bags.

Choose “Share” to open your phone’s sharing options where supported. On desktop, a popup offers WhatsApp, email, or a link you can copy. The link carries your entered amounts and choices so your partner or caregiver can open the same plan.

Choose “Print” to open your browser’s print dialog directly. Entries are not saved automatically. Keep the plan link or a printed copy, and update it as your routine changes.