Discount Calculator & Tax

Calculate discounts, sale prices, sales tax, tips and profit margins in one simple calculator. Type the numbers and see the final price and your savings right away.

STACKED DISCOUNTS, EXPLAINED
When a price drops 20% and then another 10%, the total is not 30%. On a $1,100 item the final price is $792, which is 28% off. This discount calculator applies each percent off one after another, so you can see what you will really pay before you reach the checkout.

WHAT YOU CAN CALCULATE
• Discounts: add one percent-off discount or several in a row (stacked, double or successive discounts) and get the sale price and total savings.
• Percentages: find a percent of a number, a percent increase or decrease, and the percent change between two prices.
• Sales tax: add sales tax to a price or take it out of a total, using any rate you type in.
• Reverse math: find the original price from a sale price, or the percent off from two prices.
• Deals: check offers such as 3 for 2 or buy one get one and see the real discount.
• Compare: put two offers side by side and see which one is cheaper.
• Installments: split a purchase into monthly payments and see the total you pay.
• Tips: add a tip to a bill and see the total.
• Profit margin: enter cost and selling price to get profit, margin and markup.

HOW IT WORKS
1. Pick a calculator
2. Enter the price and the percentages
3. Read the final price, the savings and every step

GOOD TO KNOW
• Two discounts in a row are always a little smaller than their sum: 20% + 10% = 28%.
• The order does not change the result: 20% then 10% equals 10% then 20%.
• A single 30% discount (multiplier 0.70) beats 20% then 10% (multiplier 0.72).
• Margin is profit divided by the selling price; markup is profit divided by cost.

PERFECT FOR
Store price tags, clearance racks, Black Friday and Cyber Monday deals, "extra 10% off at checkout" offers, pricing for your own shop, and school math homework.

FREQUENTLY ASKED QUESTIONS
How do I calculate a discount?
Sale price = original price × (1 − discount ÷ 100). Example: a $500 item at 20% off is 500 × 0.80 = $400.

How do I calculate two discounts in a row?
Discounts are applied one after another, they do not add up. For 20% then 10% the multiplier is 0.80 × 0.90 = 0.72, so the total discount is 28%.

How do I find the original price?
Original price = sale price ÷ (1 − discount ÷ 100). If you paid $900 after 25% off, the original price was 900 ÷ 0.75 = $1,200.

How do I find the price before tax?
Price before tax = total ÷ (1 + rate ÷ 100). Example: $108 with 8% tax is 108 ÷ 1.08 = $100.

How do I calculate profit margin?
Margin % = (selling price − cost) ÷ selling price × 100. Cost $80 and price $100 give $20 profit, a 20% margin and a 25% markup.