How do I calculate a discount?

Multiply the original price by (1 − discount% ÷ 100). For $100 at 20% off: $100 × 0.80 = $80. This discount calculator shows both the final price and the amount saved.

How do stacked discounts work?

Each percent applies to the price left after the previous discount - not to the original. $100 with 20% then 10% becomes $72 (28% effective), not $70. Use Stack discounts mode to compare coupon stacks before checkout.

How do I find what percentage off a sale price is?

Use Find % off mode: enter the original price and the sale price. Percent off = (original − sale) ÷ original × 100. Example: $100 → $80 is 20% off.

Can I use any currency?

Yes. The tool only uses numbers, so enter amounts in your currency. Results stay in the same units without adding a symbol.

How do I calculate a discount with tax?

First get the discounted price, then multiply by (1 + tax rate). Example: $80 after 20% off × 1.08 for 8% tax = $86.40. Check whether tax applies before or after the discount in your region - this tool shows the pre-tax discounted price.

What if the discount is more than 100%?

Discounts above 100% are not valid retail scenarios. The calculator can produce a zero or negative final price - treat anything over 100% as invalid for real sales.

Should I round sale prices to .99?

Many retailers round display prices to .99 for marketing psychology after computing the discounted amount. This tool shows exact math; apply rounding only when it matches your store policy.

Can I compare several discount tiers?

Yes. Run 20%, 30%, and 50% off (or stack two coupons) to compare final price and savings before you publish a Black Friday or checkout promotion.

Calculator Tools

Popular

Discount Calculator

Enter a price and discount percent - or stack coupons / reverse a sale ticket - to see savings and the final sale price.

Original price

Discount (%)

Final price

$80

You save

$20

About Discount Calculator

Enter an original price and a discount percent to see the amount saved and the final sale price. Switch to stack mode for sequential coupons (20% then 10% is not 30% off), or enter original + sale price to find the percent off. Built for retail markdowns, promo codes, and Black Friday math - all in your browser.

How to Use Discount Calculator

Choose percent off, stack discounts, or find % off from two prices.
Enter the original price (and a second discount or sale price if needed).
Read the final sale price, savings, and effective percent instantly.
Use the result for retail sales, stacked coupons, or price planning.

Discount Calculator Formula

Final price = original × (1 − discount% ÷ 100). Savings = original − final. Stacked: apply each percent to the remaining price. Reverse: percent off = (original − sale) ÷ original × 100. Example: $100 at 20% then 10% → $72 final, 28% effective.

Discount Calculator Examples

$100 at 20% off

Discount amount $20. Final price $80.

Stack two discounts

Apply sequentially: $100 → 20% off = $80, then 10% off $80 = $72 (effective 28% off, not 30%).

Find percent off from a ticket

Original $49.99 and sale $42.49 → about 15% off and $7.50 saved.

Common Use Cases

Retail sale pricing and window signs
Black Friday and multi-coupon stacks (store + brand code)
Confirming a coupon or promo code percent-off at checkout
Reading the percent off from an original and ticket price
Quick pre-tax sale math before checkout
Compare multiple discount tiers (20% vs 30% vs 50%) before locking a sale
Plan promotions with a clear savings and margin impact from the same original price

Read the full guide

How to Use Discount Calculator: Complete Guide (2026) - 5 min read

Frequently Asked Questions about Discount Calculator

How do I calculate a discount?: Multiply the original price by (1 − discount% ÷ 100). For $100 at 20% off: $100 × 0.80 = $80. This discount calculator shows both the final price and the amount saved.
How do stacked discounts work?: Each percent applies to the price left after the previous discount - not to the original. $100 with 20% then 10% becomes $72 (28% effective), not $70. Use Stack discounts mode to compare coupon stacks before checkout.
How do I find what percentage off a sale price is?: Use Find % off mode: enter the original price and the sale price. Percent off = (original − sale) ÷ original × 100. Example: $100 → $80 is 20% off.
Can I use any currency?: Yes. The tool only uses numbers, so enter amounts in your currency. Results stay in the same units without adding a symbol.
How do I calculate a discount with tax?: First get the discounted price, then multiply by (1 + tax rate). Example: $80 after 20% off × 1.08 for 8% tax = $86.40. Check whether tax applies before or after the discount in your region - this tool shows the pre-tax discounted price.
What if the discount is more than 100%?: Discounts above 100% are not valid retail scenarios. The calculator can produce a zero or negative final price - treat anything over 100% as invalid for real sales.
Should I round sale prices to .99?: Many retailers round display prices to .99 for marketing psychology after computing the discounted amount. This tool shows exact math; apply rounding only when it matches your store policy.
Can I compare several discount tiers?: Yes. Run 20%, 30%, and 50% off (or stack two coupons) to compare final price and savings before you publish a Black Friday or checkout promotion.

Percentage Calculator

Free online percentage calculator: find the percentage of a number, calculate percent change (increase or decrease), and work out what percent X is of Y - with the formula and instant results.

CPM Calculator

Free CPM calculator for cost per mille, eCPM, CPC, and CTR. Use the CPM formula online for display, YouTube, and podcast campaigns.