Discount Calculator - Sale Price, Savings and Effective Discount

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Results summary

1 item · Percent off
Total after discount
$90
Per unit
Original price$100
Discount$10
Price after discount$90
Total
Original total$100
Total savings$10
Total after discount$90
$100
Original total
  • You pay$90
  • Savings$10

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About this discount calculator

This discount calculator shows what you actually pay and save after a discount. It supports percent discounts, fixed amount discounts and buy X get Y free deals. You get results per unit and in total, plus an effective discount rate so you can compare deals fairly.

Understanding different discount types

Percent discounts reduce the price by a percentage of the original amount. Fixed discounts subtract a set value per unit and are capped so prices never drop below zero. Buy X get Y free deals reduce the average price by charging only for paid items while free items lower the effective cost across the full quantity.

Effective pricing and bundled deals

What is a discount?

A discount is a reduction applied to the original price of a product or service. Discounts are common in retail and e-commerce to promote sales, move inventory or reward customers. The real value of a deal depends on price, quantity and how the discount is structured, which is why converting every deal to an effective discount percentage gives you the only truly comparable number.

How percent discounts work

A percent discount reduces the price by a share of the original amount. For example, 25% off an item priced at €80:

  • Discount: 0.25 × €80 = €20
  • Final price: €80 − €20 = €60
  • Effective discount: 25%

If you buy 6 of those items, the total before discount is €480, the total saving is €120 and the total after discount is €360 — the effective rate stays 25% regardless of quantity.

How fixed amount discounts work

A fixed discount subtracts the same value from each unit, regardless of the original price. For example, €5 off an item priced at €30:

  • Final price per unit: €30 − €5 = €25
  • Effective discount: 5 ÷ 30 = 16.7%

Fixed discounts appear larger on cheaper items and smaller on expensive ones. The effective discount percentage lets you compare a fixed offer directly with a percent deal.

Buy X get Y free explained

Buy X get Y free reduces the number of units you pay for. Consider buy 2 get 1 free on a €30 item, quantity 6:

  • Deal groups: 6 ÷ (2 + 1) = 2 complete groups
  • Paid units: 2 × 2 = 4, free units: 2 × 1 = 2
  • Total paid: 4 × €30 = €120 (original: €180)
  • Savings: €60 — effective discount: 33.3%
  • Average price per unit: €120 ÷ 6 = €20

Any leftover items beyond complete deal groups are charged at full price. The calculator accounts for partial groups automatically.

Comparing deals fairly

To decide whether 20% off beats buy 2 get 1 free on a €30 item with 6 units, compare the totals:

  • 20% off: 6 × €24 = €144 (saving: €36, effective: 20%)
  • Buy 2 get 1 free: €120 (saving: €60, effective: 33.3%)

Buy 2 get 1 free saves €24 more on this purchase. The effective discount percentage makes this comparison immediate without manual calculation.

How this calculator works

Enter the price before discount and choose a discount type. The calculator then shows results per unit and in total: original price, discount amount, final price, total savings and the effective discount percentage. For buy X get Y free deals it also shows paid units, free units and the average effective price per unit.

Limitations and important notes

  • Rounding: results use standard currency rounding and may differ slightly from store calculations.
  • Taxes and fees: VAT, sales tax, shipping and service fees are not included.
  • Cart rules: stacked coupons, minimum spend and tiered discounts are not modeled.
  • Partial groups: items that do not complete a buy X get Y group are charged at full price.

Common use cases

  • Shopping and sales: check your real savings before buying.
  • Comparing promotions: decide whether 20% off beats buy 2 get 1 free.
  • Budget planning: estimate total spend when buying in bulk.
  • Pricing strategy: evaluate how a deal looks from a customer's perspective.

Supporting calculators

  • VAT after discount: use the VAT Calculator to convert discounted net prices into tax and gross totals for invoice-ready checks.
  • Promotion profitability: use the ROI Calculator to test whether a discount strategy still leaves acceptable return or margin.
  • Installment affordability: use the Loan Calculator to translate discounted basket totals into realistic monthly payment scenarios.

Glossary and Q&A