Multi-Buy Promotion Effective Unit Price

In multi-buy promotions the label price stays the same; the discount comes from free units. This tool shows the real effect on unit price and discount rate, and can be adapted to any structure such as “2 for 1”, “3 for 2” or “4 for 3”.

Formulas

• Items received = paid units + free units
• Effective unit price = unit price × paid units ÷ items received
• Effective discount (%) = free units ÷ items received × 100
• Total spend = unit price × paid units × number of sets
• Savings = unit price × free units × number of sets

Amounts and the rate are rounded HALF_UP to 2 decimals.

Inputs: “3 for 2”: paid 2, free 1; “2 for 1”: paid 1, free 1; “4 for 3”: paid 3, free 1.

Example 1: a 100 TRY item, 3 for 2: you pay 200 TRY for 3 items; effective unit price 66.67 TRY; discount 33.33%; savings 100.00 TRY.

Example 2: a 19.99 TRY item, 4 for 3, 2 sets: effective 14.99 TRY, discount 25%, spend 119.94 TRY, savings 39.98 TRY, 8 items in total.

Example 3: an 80 TRY item, 2 for 1: effective unit price 40.00 TRY, discount 50%.

How to read the result: the effective unit price is what you really pay per item under the promotion; compare it with the label price to see its value. The effective discount rate depends only on the ratio of free units to total units, not on the price. Total spend and total savings show the cash outlay for your chosen number of sets and the list-price value of the free items.