Finance calculators
Estimate loan and mortgage payments, compound interest, discounts, profit margin, and ROI. Each page shows the formula it uses. Results are illustrations, not offers from a lender.
Mortgage and loan payment illustrations, compound interest, discounts, profit margin, and ROI. Results are examples from the published formulas—not lender offers.
Loan Calculator · Mortgage Calculator · Compound Interest Calculator · Discount Calculator · Profit Margin Calculator · ROI Calculator
Loan Calculator
Estimate equal installments on an amortizing loan, plus total interest, from the amount borrowed, annual rate, and length in years.
Mortgage Calculator
Estimate the loan payment on a home purchase from price, down payment, rate, and term. Add tax, insurance, and fees if you want a fuller monthly picture.
Compound Interest Calculator
See how a balance can grow when interest is added to the principal, with an optional regular deposit.
Discount Calculator
Turn a percent off into a sale price, or work backwards from the original and sale prices to the discount rate.
Profit Margin Calculator
See profit, margin, and markup from a cost and a selling price. Margin and markup use different denominators.
ROI Calculator
Measure a simple return: profit divided by what you put in.
Related guides
- How to Calculate Percentages
- Percentage Increase vs Percentage Decrease
- How to Calculate Percentage Difference