Free Discount Calculator
Whether you're building a promo, quoting a bulk deal or checking a supplier invoice, this calculator handles flat and percentage discounts on single items or full line-item lists — with optional tax on top.
Saves $20.00 → $80.00
Results
About the Discount Calculator
How the discount is applied
Percentage discount: Final = Original × (1 − Discount / 100). Flat discount: Final = Original − Discount. If tax is entered, it's applied to the discounted price, not the original — matching standard invoicing behaviour.
Discounting without eroding margin
A 20% discount on a product with a 40% margin cuts profit by half. Before promising a discount, check your margin — the profit margin calculator on this site tells you exactly how much room you have.
Volume vs promotional discounts
Volume discounts are permanent tiered pricing tied to quantity — they belong in your price list. Promotional discounts are time-limited and should have an end date. Mixing them trains customers to always wait for a promo.
Frequently asked questions
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