Business & shopping calculators
Price products, check margins, split bills and work out percentages in seconds.
Percentage Calculator
Solve any everyday percentage question: X% of Y, X is what % of Y, and more.
Percentage Change Calculator
Find the percent increase or decrease between an old and a new value.
Discount Calculator
Find the sale price and savings, including "extra % off" stacked discounts and tax.
Sales Tax Calculator
Add sales tax to a price, or remove it from a total that already includes tax.
Tip Calculator
Work out the tip and split the bill fairly between everyone at the table.
Profit Margin Calculator
Find your profit margin from cost and price — or the price needed for a target margin.
Markup Calculator
Get the selling price from your cost and markup — plus the matching profit margin.
Break-Even Calculator
Find how many units you need to sell to cover your costs.
ROI Calculator
Measure the return on an investment, project or marketing campaign.
Percentages run every business
Margins, markups, discounts, tax and return on investment are all percentage math, and they are easy to get wrong in your head. A 50% markup is only a 33% margin; a 20% discount followed by 20% off again is not 40% off. These tools do the math precisely and show the in-between numbers so you can see exactly where the result comes from.
Pick the right tool
- Pricing: markup, profit margin and break-even calculators.
- Shopping: discount, sales tax and tip calculators.
- Everyday percentages: the percentage calculator and percentage change calculator.
- Investments and campaigns: the ROI calculator.
Frequently asked questions
What is the difference between margin and markup?
Markup is profit as a percentage of cost; margin is profit as a percentage of the selling price. The same $25 profit on a $50 cost and $75 price is a 50% markup but a 33.3% margin.
Do these calculators save my numbers?
No. Everything is calculated in your browser and nothing is sent to a server.