Toolzie

Discount Calculator

How to Use the Discount Calculator

Enter price and discount %. See discount amount and final price. Work backwards too.

Figure true savings. Compare discounts across stores, verify sale prices.

Frequently Asked Questions

Multiple discounts?

Chain calculations.

Tax?

Before tax; add 15% HST for Nova Scotia.

Find percentage?

Enter original and sale prices.

Fixed discount?

Subtract from price directly.

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Helpful?

Sale price math: more than just multiplication

A "20% off" sign seems simple: $100 item becomes $80. But stores use several tricks: double discounts ("30% off, then an extra 20%" is 44% off, not 50%), original price inflation (the "original" price was never charged), bundle discounts (3 for $X may cost more per unit than buying what you need at full price), percentage vs fixed ("$20 off" beats "10% off" on items under $200), and tax math (the discount applies to the pre-tax price, but sales tax is on the discounted price).

When "buy more save more" is worth it

Only if you'd buy the items anyway at full price. The formula: total discount ÷ quantity = per-item savings. If a 3-for-$30 deal saves you $9, and you'd normally buy 1 at $13, you're actually spending $20 more for items you might not use. Stockpile deals on non-perishables you already buy (toilet paper, toothpaste) make sense. Stockpile deals on perishable or trendy items rarely do.

Negotiating tips

Stores will often match competitors' advertised prices. Use our calculator to determine the absolute lowest price you'll accept, then ask. For big purchases (cars, furniture, electronics), the listed "discount" is often 10-30% negotiable. Cash discounts still exist for some services. Bundle deals can be good if the bundle price beats individual prices, but verify with math. Always calculate the per-unit cost to compare deals.

About This Tool

The Toolzie Discount Calculator instantly computes the final price after a percentage discount, or works backwards to find the original price or discount percentage. Great for shopping, sales pricing, and financial planning.

How to Use

  1. Enter the original price and discount percentage, OR enter the sale price to find the discount.
  2. Click Calculate to see the final price, savings amount, and discount rate.
  3. Switch modes to solve for different unknowns.
  4. Use the results for shopping or pricing decisions.

Frequently Asked Questions

How do I calculate 20% off $80?

Enter 80 as the original price and 20 as the discount percentage. The result is $64.

Can I find the original price from a sale price?

Yes — switch to 'Find Original Price' mode and enter the sale price and discount percentage.

Does it include tax?

No — this calculates pre-tax discount prices. Add your local tax rate separately.

Can I calculate stacked discounts?

Apply the first discount, then use the result as the new original price for the second discount.