Finance Calculators
These finance calculators cover the money questions that come up at a checkout, a loan offer, or payday: what a mortgage or car loan will cost each month and in total, how much of a paycheck you actually take home, how savings grow with compound interest, and whether you're on track for retirement. Everyday tools sit alongside them, from splitting a tip to stacking discounts and sales tax.
The Mortgage Calculator includes property tax, insurance, PMI and HOA dues, the Income Tax and Paycheck calculators use 2026 US federal tax brackets (they're US-only), and the APR Calculator shows why the advertised interest rate and the true annual percentage rate differ. Results update as you type, and every calculation runs in your browser. All of them are general estimates rather than financial advice, so check the terms in your actual loan or investment documents.
- Tip Calculator
Calculate a tip and split the bill fairly among any number of people.
- APR Calculator
Calculate the true APR of a loan, car loan, or credit card — including fees.
- ROI Calculator
Work out the return on an investment, rental property, or marketing spend.
- Discount Calculator
Calculate a sale price, stack multiple discounts, and factor in sales tax.
- Sales Tax Calculator
Add sales tax to a price or remove it from a total, including VAT and GST-inclusive prices.
- Margin Calculator
Find profit margin and markup from cost and price, or price for a target margin.
- Mortgage Calculator
Monthly house payment with property tax, insurance, PMI and HOA, plus extra payments.
- Loan Calculator
Monthly payment, total interest and payoff date for auto, personal and student loans.
- Compound Interest Calculator
See how savings grow with compound interest and monthly deposits.
- Retirement Calculator
Project your 401(k) and retirement savings and the income they could provide.
- Paycheck Calculator
Estimate take-home pay after federal, state and FICA taxes and 401(k) deductions.
- Income Tax Calculator
Estimate your US federal income tax, tax bracket and refund for 2026.