Business & Investing
Margins, break-even, ROI, and interest calculators.
Break-even Calculator
Find how many units you need to sell to cover your costs.
Profit Margin Calculator
Margin and markup, side by side, so you never confuse them again.
ROI Calculator
Total and annualized return on any investment.
Discount Calculator
Sale price and savings — including stacked discounts.
Compound Interest Calculator
Growth over time, with your choice of compounding frequency.
Simple Interest Calculator
Interest earned using I = P × R × T.