Discount, VAT & Tip Calculator
Sale prices, stacked discounts, VAT in or out and tip splits. Runs in your browser.
About this discount, vat & tip calculator
This calculator finds the final price after a discount, including stacked discounts like "25% off, then an extra 10%". It also adds or removes sales tax and VAT, works back to the original price, and splits a tip between friends.
Each answer updates while you type and shows the formula with your numbers in it. You can see exactly how 120 became 81, check it, and copy the result.
It is built for shoppers, small shop owners and anyone filling in an expense form. All the maths runs in your browser.
Features
Stacked discounts
Add up to five discounts in order. Each can be a percent or a fixed amount off, like a 5.00 coupon after a 20% sale.
Effective discount
See the true total percent off. 25% then 10% off is 32.5% off, not 35%.
Tax after discount
Tick one box to add sales tax or VAT to the discounted price, the order most shops use at the till.
VAT added or removed
Add tax to a net price, or take it out of a gross price the right way, by dividing. Quick buttons for 5%, 7.5%, 10%, 15%, 18% and 20%.
Original price finder
Paid 75 after 40% off? It works back to the original 125.
Tip and split
Tip on the full bill or on the amount before tax, split it any number of ways, and round each share up to 0.05, 0.50, 1, 5 or 10.
How to use the discount, vat & tip calculator
- 1Pick Discount, Sales tax / VAT or Tip & split.
- 2Enter the price, rates and any extra discounts or people.
- 3Read the result and the formula. Copy it with one click.
When to use it
Sale shopping
Check a "40% off + extra 20% at checkout" deal before you queue. It is 52% off, not 60%.
Expense claims
Pull the VAT out of a receipt total so you can claim the net amount and the tax on separate lines.
Pricing in a shop
Set a sale price, then confirm the customer total with VAT on top. To bill the customer, create an invoice with the same figures.
Dinner with friends
Split a 86.40 bill with an 18% tip three ways: 33.98 each.
How do I calculate a discount?
Multiply the price by (1 − discount ÷ 100). A 120 item at 25% off costs 120 × 0.75 = 90, and you save 30.
For a fixed amount off, simply subtract it. The calculator never lets a price go below zero, so a 50 coupon on a 40 item gives 0, not −10.
Why don't stacked discounts add up?
The second discount is taken from the already reduced price. With 25% and then 10% off a 120 item, you pay 120 × 0.75 × 0.90 = 81. That is 39 off, or 32.5%, not 35%.
The order of two percent discounts doesn't change the final price, because multiplication works in any order. The order does matter when you mix a percent and a fixed amount: 20% off then 10 off a 100 item gives 70, but 10 off then 20% off gives 72.
For two percents, the combined discount is 1 − (1 − a)(1 − b). The percentage calculator handles single percent changes if you want to check one step.
How do I remove VAT from a price?
Divide the gross price by 1 plus the VAT rate. At 15% VAT, 1,150 ÷ 1.15 = 1,000 net, and the VAT is 150.
Taking 15% off 1,150 gives 977.50, which is wrong. The tax was added to the net price, so 15% of the gross is more than the tax actually charged. This mistake is common on expense forms.
- Add tax: gross = net × (1 + rate ÷ 100)
- Remove tax: net = gross ÷ (1 + rate ÷ 100)
- Tax in a gross price: gross − net, or gross × rate ÷ (100 + rate)
Should I tip on the total before or after tax?
Etiquette guides in the US usually say tip on the pre-tax amount, though many people tip on the total for simplicity. The difference is small: on an 80.00 meal with 6.40 tax, an 18% tip is 14.40 before tax and 15.55 after.
Tick "Tip on the amount before tax" and enter the tax from the receipt to use the pre-tax base.
Why use Mavros
| Mavros | Typical upload sites | |
|---|---|---|
| Discounts | Up to five, percent or fixed, in order | One discount, or two percents only |
| VAT | Add and remove with the right formula | Add only, or a separate page |
| Working | Each step shown with your numbers | Final figure only |
| Tip split | Pre-tax option and round-up per person | Basic split |
| Speed | Live as you type | Calculate button and page reload |
| Privacy | Runs in your browser | Ads and trackers around the form |
Tips
- When two shops offer different deals, compare final prices, not percentages. A fixed 15 off can beat 10% off below 150.
- Rounding each share up to a whole number makes cash splits easy. The page shows how much extra tip that adds.
- Comparing pack sizes? Work out the price per kilo or litre, using the unit converter if the packs use different units.
- VAT rates differ by country and product. Check the rate on your receipt rather than assuming the standard one.
Questions
How do I calculate the price after a discount?
Multiply the original price by 1 minus the discount as a decimal. 30% off 80 is 80 × 0.70 = 56. Enter the price and percent above and the calculator also shows how much you save.
Is 20% off plus 10% off the same as 30% off?
No, it is 28% off. The 10% is taken from the already reduced price: 100 × 0.80 × 0.90 = 72. Add both discounts as separate rows to see the effective total.
How do I work out the original price before a discount?
Divide the sale price by 1 minus the discount. If you paid 75 after 40% off, the original was 75 ÷ 0.60 = 125. Use the Find the original price box.
How do I calculate VAT backwards from a total?
Divide the total by 1 plus the VAT rate to get the net price, then subtract to find the VAT. At 20%, a 240 total is 200 net plus 40 VAT.
Is sales tax charged before or after a discount?
In most places tax is charged on the discounted price, which is how this calculator does it. Some manufacturer coupons in parts of the US are taxed on the pre-discount price, so check your receipt.
How much should I tip?
In the US, 15% to 20% is usual at sit-down restaurants, and 18% is a common middle. Many other countries include service in the bill or tip much less, so check local custom.
Can I use a fixed discount and a percent together?
Yes. Add a row, switch it to "off" and enter the amount. Rows are applied from top to bottom, and the working shows each step.