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.

How this calculator works

The calculator starts with the price before discount and applies the deal you choose. It then shows:

  • The original price and total cost without any discount
  • The discount amount, which is your savings
  • The final price after the discount
  • The effective discount rate, which expresses any deal as a comparable percentage

Results are shown both per unit and in total, so you can evaluate single items and bulk deals.

Percent off vs. fixed amount off

A percent discount scales with price. For example, 10% off a $100 item saves $10, while 10% off a $20 item saves $2.

A fixed discount subtracts the same amount from each unit, regardless of price. To compare fixed discounts with percentage deals, we also show the effective discount percentage.

Buy X get Y free explained

Buy X get Y free deals work by reducing the number of items you pay for. You still receive the full quantity, but some units are free.

This calculator determines how many items are paid and how many are free based on your quantity, then spreads the cost across all units to calculate an average effective price. The effective discount rate lets you compare BXGY deals with percent and fixed discounts.

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

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
  • Educational purpose: verify final prices at checkout or on official invoices

Glossary & Q&A