Shopping Savings Calculator — how much do you really save on a discount?

The percentage saving is calculated as (price_before - price_after) / price_before x 100. For example, if the regular price is PLN 100 and the sale price is PLN 75, the saving is 25%.

Annual savings scale linearly with purchase frequency. If you save PLN 2 per purchase and buy 20 times a month, you save PLN 40/month and PLN 480/year. Doubling purchase frequency doubles annual savings.

It depends on the purchase price and frequency. A 10% discount on PLN 5 coffee bought 20 times a month saves PLN 120 per year. On a PLN 1,000 monthly grocery bill, a 10% discount saves PLN 1,200 per year — well worth seeking out.

Enter the regular price as price_before and the loyalty card price as price_after. Set the monthly purchase frequency. The annual saving shows whether the card fee (if any) is justified by the savings.

No — the calculator shows pure price savings only. If a discount store is further away, factor in transport costs (fuel or public transport) and time value when deciding whether the promotion is truly beneficial.

This is a 25% discount (you pay for 3 out of 4 items). Enter the unit price as price_before and 75% of that price as price_after (e.g. PLN 100 and PLN 75) to calculate savings. The calculator then shows monthly and annual value.

Research suggests that disciplined discount shoppers save 10-20% on groceries annually. On a PLN 1,500 monthly grocery budget, consistent 15% savings add up to PLN 2,700 per year — equivalent to over a month of grocery spending.

Only if the product has a long shelf life and you will actually use it. Buying perishables in bulk to get a discount can result in waste that eliminates all savings. For non-perishables (cleaning products, canned goods, toilet paper), bulk buying at a discount is generally beneficial.

If price_after is higher than price_before, the saving_per_purchase value will be negative, indicating a cost increase rather than saving. This can be used to calculate how much more you pay at a premium store compared to a standard one.

Yes — enter the regular monthly subscription price as price_before and the promotional price as price_after, then set monthly purchases to 1. The annual saving will show the total discount over 12 months.