TheCalculatory
13 calculators live

Financial Calculators

Loans, mortgages, investing, savings, tax and business maths.

Compound Interest Watch savings grow when interest earns interest, with a year-by-year schedule. 6 inputs Open → Loan Monthly payment, total interest and a full amortization schedule. 4 inputs Open → Mortgage Principal, interest, taxes, insurance and PMI — the full monthly payment. 9 inputs Open → Auto Loan Monthly payment after trade-in and sales tax, plus the full amortization schedule. 7 inputs Open → Income Tax Federal tax owed, bracket by bracket, plus your effective and marginal rate. 4 inputs Open → Sales Tax Add tax to a price, or back out the pre-tax price from a tax-included total. 2 inputs Open → Discount Sale price, amount saved, or work backward from a sale price to the original. 2 inputs Open → Savings How long to reach a savings goal, or how much to save monthly to get there. 4 inputs Open → Investment Nominal growth plus the inflation-adjusted real return, side by side. 5 inputs Open → Rule of 72 The classic mental-math shortcut for doubling time, checked against the exact figure. 1 input Open → Simple Interest Straight-line interest on a principal — no compounding, no reinvested earnings. 3 inputs Open → Credit Card Payoff How long a fixed payment takes to clear a balance, and the interest it costs. 3 inputs Open → Debt-to-Income Total monthly debt ÷ gross monthly income, with the lender risk band. 2 inputs Open →