# Discount Calculator > Free discount and percent off calculator: find the sale price, stack extra % off and coupons, add your state's sales tax, or work out what % off a price is. Use it free at https://k4converter.com/discount-calculator. Runs entirely in your browser. ## How to Use the Discount Calculator - **Enter the original price** from the tag. - **Tap a % off** or type your own. Use *+ Add another discount or coupon* for "extra 20% off" deals and $-off coupons; they're applied in order, just like at the register. - **Pick your state** under Sales tax to see what you'll actually pay at checkout. - Switch tabs to find **what % off** a sale price is, **compare two deals** such as BOGO vs 30% off, or keep a **running cart total** while you shop. ## How to Calculate a Discount (Percent Off) Multiply the price by the percent off to get the savings, then subtract it: **sale price = price × (1 − discount ÷ 100)**. A $80 jacket at 25% off saves $20 and costs **$60**. A shortcut: for 20% off multiply by 0.8, for 30% off by 0.7, for 40% off by 0.6. - **30% off $40** = $40 × 0.7 = **$28** (you save $12) - **20% off $50** = $50 × 0.8 = **$40** (you save $10) - **25% off $60** = $60 × 0.75 = **$45** (you save $15) - **40% off $30** = $30 × 0.6 = **$18** (you save $12) ## How to Find the Percent Off (Discount Percentage) To find what percent off a sale is, subtract the sale price from the original price, divide by the original price and multiply by 100: **percent off = (original − sale) ÷ original × 100**. A $80 item on sale for $60 is ($80 − $60) ÷ $80 × 100 = **25% off**. Use the *% off* tab above to do it instantly, or to work backwards from a sale price to the original price. ## How to Find the Sale Price The sale price is what you pay after the discount and before tax: **sale price = original price − (original price × percent off ÷ 100)**. If the sale price and the percent off are known, the original price is sale price ÷ (1 − percent off ÷ 100): a $60 sale price at 25% off means the original was $80. ## Double Discounts: Stacked Discounts Don't Add Up "40% off plus an extra 20% off" sounds like 60% off, but the second discount is taken from the already-reduced price. On a $100 item: 40% off gives $60, and 20% off $60 gives **$48**. That's a true discount of **52%**, not 60%. The calculator shows the real percentage and each step, so you can check the register. **Quick rule:** to combine two discounts, multiply what's left: (1 − 0.40) × (1 − 0.20) = 0.48, so you pay 48% of the price. ## Does the Order of Coupons Matter? For two percentage discounts, no: 40% then 20% gives the same price as 20% then 40%. But when you mix a **$-off coupon** with a **% off sale**, order matters. On a $100 item with 50% off and a $10 coupon, taking the $10 off first gives $45; taking it off after the 50% gives $40. Stores usually apply the percentage first, which is the better deal for you. When both are present, the calculator shows both totals. ## Discount Calculator With Tax: Sales Tax on Discounted Items Sales tax is charged on the price after **store** discounts and store coupons. **Manufacturer** coupons are different: in most states the store is reimbursed for them, so tax is charged on the price before the coupon. Tick the manufacturer-coupon box to see the exact register total. Statewide rates used by the calculator: | State | Rate | State | Rate || Alabama | 4% | Montana | 0% || Alaska | 0% | Nebraska | 5.5% || Arizona | 5.6% | Nevada | 6.85% || Arkansas | 6.5% | New Hampshire | 0% || California | 7.25% | New Jersey | 6.625% || Colorado | 2.9% | New Mexico | 4.875% || Connecticut | 6.35% | New York | 4% || Delaware | 0% | North Carolina | 4.75% || District of Columbia | 6% | North Dakota | 5% || Florida | 6% | Ohio | 5.75% || Georgia | 4% | Oklahoma | 4.5% || Hawaii | 4% | Oregon | 0% || Idaho | 6% | Pennsylvania | 6% || Illinois | 6.25% | Rhode Island | 7% || Indiana | 7% | South Carolina | 6% || Iowa | 6% | South Dakota | 4.2% || Kansas | 6.5% | Tennessee | 7% || Kentucky | 6% | Texas | 6.25% || Louisiana | 5% | Utah | 6.1% || Maine | 5.5% | Vermont | 6% || Maryland | 6% | Virginia | 5.3% || Massachusetts | 6.25% | Washington | 6.5% || Michigan | 6% | West Virginia | 6% || Minnesota | 6.875% | Wisconsin | 5% || Mississippi | 7% | Wyoming | 4% || Missouri | 4.225% | | | Rates are statewide minimums as of October 2026 (California, Utah and Virginia include their mandatory statewide local rate). Most cities and counties add local tax on top. ## BOGO, Multi-Buy and "X for $Y" Deals Buy one, get one free is **50% off** when you buy two, but only 33% off if you buy three. Buy one, get one 50% off is **25% off** a pair. "2 for $5" on a $3 item saves $1 per pair. The Compare deals tab works out the real cost for the number of items you actually need, so you can see whether a BOGO beats a flat percentage. ## Percent Off Chart Sale prices for common prices and discounts. Find the original price in the left column and read across: for example, 30% off $40 is $28 and 50% off $70 is $35. | Price | 10% off | 15% off | 20% off | 25% off | 30% off | 40% off | 50% off | 60% off | 70% off || $15.00 | $13.50 | $12.75 | $12.00 | $11.25 | $10.50 | $9.00 | $7.50 | $6.00 | $4.50 || $20.00 | $18.00 | $17.00 | $16.00 | $15.00 | $14.00 | $12.00 | $10.00 | $8.00 | $6.00 || $25.00 | $22.50 | $21.25 | $20.00 | $18.75 | $17.50 | $15.00 | $12.50 | $10.00 | $7.50 || $30.00 | $27.00 | $25.50 | $24.00 | $22.50 | $21.00 | $18.00 | $15.00 | $12.00 | $9.00 || $35.00 | $31.50 | $29.75 | $28.00 | $26.25 | $24.50 | $21.00 | $17.50 | $14.00 | $10.50 || $40.00 | $36.00 | $34.00 | $32.00 | $30.00 | $28.00 | $24.00 | $20.00 | $16.00 | $12.00 || $50.00 | $45.00 | $42.50 | $40.00 | $37.50 | $35.00 | $30.00 | $25.00 | $20.00 | $15.00 || $60.00 | $54.00 | $51.00 | $48.00 | $45.00 | $42.00 | $36.00 | $30.00 | $24.00 | $18.00 || $70.00 | $63.00 | $59.50 | $56.00 | $52.50 | $49.00 | $42.00 | $35.00 | $28.00 | $21.00 || $80.00 | $72.00 | $68.00 | $64.00 | $60.00 | $56.00 | $48.00 | $40.00 | $32.00 | $24.00 || $100.00 | $90.00 | $85.00 | $80.00 | $75.00 | $70.00 | $60.00 | $50.00 | $40.00 | $30.00 || $150.00 | $135.00 | $127.50 | $120.00 | $112.50 | $105.00 | $90.00 | $75.00 | $60.00 | $45.00 || $200.00 | $180.00 | $170.00 | $160.00 | $150.00 | $140.00 | $120.00 | $100.00 | $80.00 | $60.00 | ## Works on Your Phone in the Store The calculator is designed for one-handed use in the aisle: a number keypad, big tap targets, instant results and a summary bar that stays visible while you scroll. It works offline once loaded, and nothing you enter leaves your phone. ## Frequently Asked Questions ### How do I calculate 20% off a price? Multiply the price by 0.8. For example, 20% off $45 is $45 × 0.8 = $36, a saving of $9. ### What is 30% off $40? 30% off $40 is $28. The discount is $40 × 0.30 = $12, and $40 − $12 = $28. ### How do you find the percent off? Subtract the sale price from the original price, divide by the original price and multiply by 100. A $50 item on sale for $35 is ($50 − $35) ÷ $50 × 100 = 30% off. ### Is 40% off plus 20% off the same as 60% off? No. The extra 20% is taken from the already-reduced price, so 40% then 20% equals 52% off in total. On $100 you pay $48, not $40. ### How do I find the percent off from the sale price? Subtract the sale price from the original price and divide by the original price. $80 reduced to $60 is ($80 − $60) ÷ $80 = 25% off. ### Is sales tax calculated before or after a discount? After store discounts and store coupons. For manufacturer coupons, most states charge tax on the price before the coupon. ### How do I find the original price before a discount? Divide the sale price by (1 − discount). A $60 item that is 25% off was originally $60 ÷ 0.75 = $80. ### Is buy one get one free the same as 50% off? Only when you buy an even number of items. Two items at BOGO is 50% off; three items is 33% off because you pay for two. ### Should a $10 coupon be applied before or after a percent-off sale? You pay less when the percentage is applied first and the $10 coupon second. Most stores do it that way. --- By Prakhar Singh, creator of K4Converter. Last updated October 2026.