🧻Price per item calculator

• ✓The amount you pay is divided by the number of items to give the price per item.
• ✓The optional smaller unit — metres per roll, sheets per pack, tablets per box — produces a second, finer unit price.
• ✓The unit name you type is used for display only; it does not change the calculation.
• ✓Enter the price you actually pay after any discount for an accurate figure.
• ✓Everything runs in your browser.

Price per item

price per item = total price / number of items

Total smaller units

total = smaller units per item x number of items

e.g. 30 rolls x 25 m = 750 m

Price per smaller unit

price per unit = total price / total smaller units

Pack A: 30 rolls for 24.00 with 25 m per roll. Pack B: 24 rolls for 21.60 with 30 m per roll.

1. 1A: 24.00 / 30 = 0.80 per roll, 750 m in total, so 0.032 per metre
2. 2B: 21.60 / 24 = 0.90 per roll, 720 m in total, so 0.030 per metre
3. 3A wins on price per roll, B wins on price per metre

Counting rolls makes A look better, but per metre of paper B is about 6% cheaper. Where the item size varies, always compare the smaller unit.

• !A roll or a pack is not a standard size. Comparing counts alone hides big differences in what you actually receive.
• !Thickness matters too: two-ply and three-ply paper of the same length do not last the same time.
• !Add delivery to the price for online orders, otherwise bulky multipacks look cheaper than they are.
• !Storage space has a cost of its own if a large pack has nowhere to go.