Finance calculators
TudoCalc's finance calculators help you plan and decide with real numbers: compound interest, mortgage, take-home pay, profit margin and more. Each runs instantly and free, right in your browser — no sign-up, no spreadsheets.
Compound interest
See how your money grows over time with monthly contributions and an evolution chart.
Simple interest
Calculate simple interest and the final amount from principal, rate and time.
Loan (SAC and Price)
Simulate the installments of a mortgage or car loan in the SAC and Price systems.
Profit margin
Calculate profit, profit margin and markup from cost and selling price.
CAGR (annual growth)
Calculate the compound annual growth rate (CAGR) of an investment between two values.
ROI (return on investment)
Calculate the return on investment (ROI) and profit from the amount invested and the amount returned.
APY (effective rate)
Convert a nominal annual rate into the effective yield (APY) based on the compounding frequency.
Rule of 72
Find out how long an investment takes to double, triple or quadruple at a given interest rate.
Interest rate converter
Convert equivalent rates between day, month and year under compound interest. Example: 1% a month equals 12.68% a year — not the 12% you would expect.
Present value
Find out how much to invest today to reach a future amount, given the rate and term.
Freelance hourly rate
Find out how much to charge per hour from your monthly income goal and the hours you work.
50/30/20 budget
Split your monthly income by the 50/30/20 rule: needs, wants and savings/debt.
Dividend yield
Calculate a stock's dividend yield and how much you would receive from dividends on an investment.
Savings goal
Find out how much to save each month to reach a goal by a deadline, accounting for returns.
Millionaire calculator
See how long your first million takes with your monthly contributions and compound interest. Example: $1,000 a month at 10% a year gets there in ~23 years.
Purchasing power (inflation)
See what your money will be worth in the future at an estimated inflation rate — and how much you'll need to keep the same purchasing power.
Extra payments
See how many months and how much interest you save by paying extra on your loan every month.
Cash vs installments
Find out whether to pay cash (with a discount) or pay in installments and keep your money invested.
Late payment interest
Calculate the updated value of an overdue debt with penalty and interest.
Profit sharing
Split a profit (or cost) among partners in proportion to what each invested.
Prorated rent
Calculate rent for a partial month, paying only for the days occupied.
Debt-to-income
See how much of your income goes to payments and your healthy maximum installment.
Overtime pay
Work out your overtime pay from your regular hourly rate, the overtime multiplier and the number of hours.
Pay raise
See your new salary after a percentage raise and how much it adds per month and per year.
Break-even point
Find how many units you need to sell to cover costs and start making a profit.
Paycheck (take-home)
Estimate US take-home pay after federal income tax, FICA and state tax.
Mortgage
Calculate your monthly mortgage payment (PITI) and total interest for a US home loan.
Auto loan
Calculate your monthly car loan payment and total interest.
401(k)
Project your 401(k) balance with annual contributions, employer match and growth.
Credit card payoff
See how long it takes to pay off your credit card and how much interest you pay.
Salary ↔ hourly
Convert an annual salary to an hourly wage and vice versa, based on hours and weeks worked.
Sales tax
Calculate US sales tax and the total price from the amount and the tax rate.