Box of Tools
A collection of small, fast, free utilities. Most run entirely in your browser — a few, like the Stock Calculator, need to look up live data from our server, but nothing you type is ever stored.
Financial
Tip Calculator
Split the bill and calculate tip for any group size, with optional tax handling and rounding.
Mortgage Calculator
Estimate your monthly mortgage payment, see a cost breakdown, and view a yearly amortization schedule.
Loan Calculator
Estimate the monthly payment, total interest, and payoff date for a mortgage, auto, or personal loan, with optional extra payments and fees.
Stock Calculator
Figure out what a hypothetical investment in a U.S. stock or ETF would be worth today, with or without reinvested dividends.