Shopping guide
How to compare store brand and name brand value
How to compare store brand and name brand value. Use the relevant ShopWithShery calculator to verify the math with your own prices, quantities and terms.
Normalize both products to the same unit first, then decide whether any quality, ingredient or performance difference is worth the premium.
The calculation to use
Brand premium % = (higher unit price ÷ lower unit price − 1) × 100Watch for: Do not compare package prices directly when the sizes, quantities, fees or timing of rewards differ.
A practical way to compare the offers
- Write down the price, quantity, package size and promotion exactly as shown.
- Convert both choices to the same comparison basis: per unit, delivered cost, effective discount or cost per use.
- Separate immediate checkout savings from later rewards such as cashback or store credit.
- Consider waste, required purchase quantity, recurring commitments and return restrictions.
- Choose the offer that fits both the math and the quantity you will realistically use.
Why shoppers get this wrong
Retail offers often present several numbers at once: package size, headline discount, multibuy quantity, loyalty reward and shipping threshold. Human comparison becomes difficult when those numbers use different denominators. Normalizing the offers removes much of that noise.
Compare two differently sized packages on the same unit basis. Compare equivalent quantities so the result is not distorted by pack size alone.