How to Use the Grocery Promo Unit Price Calculator
Buy-one-get-one, three-for-two, and bundle deals at the grocery store look like a win on the surface, but whether they actually save you money depends on how the promo price compares to the regular per-item price. This calculator divides the total amount you pay by the number of items you receive to get the real unit price, then compares it against the regular price to show your true savings and discount rate.
Two deals both labeled "buy one get one" can have very different real discount rates. Some stores quietly bump up the regular price right before launching a promo, making the advertised discount look bigger than it really is. Remembering — or checking — the item's normal price elsewhere and entering that accurate figure helps you filter out that kind of inflated discount.
When deciding between several promo items, calculating the real unit price for each and comparing them directly is the most reliable approach — whichever comes out lower is the better deal. Just keep in mind that no matter how low the unit price is, food you can't finish before it expires still ends up as a loss, so factor in whether you can realistically use it all.
Frequently Asked Questions
Divide the payment amount by the total items received for each deal, then compare the resulting unit prices. Enter both deals into this calculator separately — whichever gives the lower unit price is the better deal.
Yes. Some stores quietly raise the regular price right before running a BOGO promo, so the advertised discount may not reflect real savings. Enter the true everyday unit price to see the actual discount rate.