Supply Calculator: Days of supply and cost per day right on the product page

About the Extension

How long does a tub last? What does it cost me per day? Your customers ask these questions about almost every consumable product, yet the product page rarely answers them. Anyone who has to do the maths themselves loses time and is unsure which pack size to pick. With the Supply Calculator you show right on the product page how many days a pack lasts and what it costs per day and per month.

100 days. No guessing.

"Supply Calculator" adds a calculator box to your product page. Your customers choose their amount per day or per week, either from your dose presets or as their own amount, and pick the pack size. They instantly see how long the pack lasts, what it costs per day and per month, and until when it lasts. One click on a pack selects the matching variant directly in the buy box. An example: 5 g per day from the 500 g tub lasts 100 days.

Your benefits with Supply Calculator:

1. Set up without code: You maintain the values in a dedicated “Supply Calculator” tab in the product editor. Pack sizes come from the selling unit and unit of measure you already maintain for the base price.
2. Maintain once, use everywhere: The values are stored in a custom field on the product. Variants inherit them, and CSV import and API work without extra effort.
3. Make larger packs visible: The savings hint shows how much your customers save per month with the larger pack.
4. Flexible placement: Use the calculator box on the product page or the CMS element in your shopping experiences, each with its own heading.

Why your customers will love Supply Calculator:

1. Clarity before buying: They see the days of supply and the cost per day and per month without doing the maths.
2. Their own amount: They choose one of your dose presets or enter their own amount, per day or per week.
3. The right pack in one click: One click on a pack selects the variant directly in the buy box.
4. Reorders in view: The reorder date shows until when the pack lasts.

What makes the Supply Calculator different:

• Data right on the product: The values are stored as a custom field on the product, not in a separate list next to your catalogue. Variants inherit them, labels are translatable.
• No double maintenance: The calculator reads pack sizes from the selling unit and unit of measure of your products.
• For many industries: Food supplements and sports nutrition, pet food, coffee and tea, contact lenses, cosmetics, detergents and cleaning products, printer ink or garden supplies.
• You set the values: You define the dose presets and labels. The calculator only works with your figures and gives no recommendations of its own.
• Bilingual: The calculator box is available in German and English.
• Support from Germany: Developed and maintained by brainstation, a Shopware agency from Landau in der Pfalz with more than 15 years of experience. Our Shopware 6 extensions in the store have 56 reviews with an average of 4.92 out of 5 stars (as of 16 October 2026).

Give your customers the answer before they go looking for it. Try the Supply Calculator with the free trial month and show today how long your packs last. Supply Calculator: Days of supply and cost per day right on the product page.

Are you happy with our app and our service? Then we would be thrilled about your review in your Shopware Account or Admin. It helps us keep developing new, useful apps for you. Thank you for your support!