Interest Calculator

  • Growing Perpetuity Calculator
    Calculate the present value of a growing perpetuity using the Gordon Growth formula PV = C / (r − g). Enter cash flow, discount rate and growth rate.
  • Annualized Return (CAGR) on Deposit Calculator
    Calculate the annualized return (CAGR) of a deposit or investment from its start value, end value and holding period. Free and instant.
  • After-Tax Savings Interest Calculator
    Calculate the net interest you keep on savings after tax. Enter principal, rate, compounding and tax rate to see gross interest, tax owed and final balance.
  • How Much Can I Borrow From a Monthly Payment?
    Find out how much you can borrow based on a monthly payment, interest rate, and term. Reverse loan calculator using present value of an annuity.
  • Zero-Coupon Bond Price Calculator
    Calculate the present value (price) of a zero-coupon bond from its face value, yield, years to maturity and compounding frequency.
  • Weighted Average Interest Rate Calculator
    Calculate the weighted average interest rate across multiple loans by balance. Find your true blended rate for debt consolidation and refinancing decisions.
  • Present Value of Annuity Calculator
    Calculate the present value of an ordinary annuity from the payment, interest rate per period, and number of periods using PV = PMT×(1−(1+r)⁻ⁿ)/r.
  • Annuity Due Calculator (FV & PV)
    Calculate the future value and present value of an annuity due, where payments are made at the start of each period. Enter payment, rate and number of periods.
  • Savings Account Future Value Calculator
    Estimate the future value of a savings account with a starting balance, regular deposits, an interest rate and compounding frequency. See growth and total interest.
  • Rule of 72 Calculator
    Use the Rule of 72 to estimate how long it takes to double your money at a given interest rate, or what rate doubles it in a set time, with exact compound values.
  • Present Value of $1 Annuity (PVIFA) Table Creator
    Generate a custom PVIFA table — present value of $1 received each period for n periods at rate i. Choose ordinary or annuity due, rows, columns and increments.
  • Present Value Calculator
    Compute the present value of a future lump sum plus an optional annuity, annuity-due, growing annuity or perpetuity, with periodic or continuous compounding.
  • Nominal Interest Rate Calculator (from Effective Rate)
    Convert an effective interest rate into the nominal rate per period from the number of compounding intervals. Supports continuous compounding and multi-period totals.
  • Savings Goal Calculator: Time to Reach a Target
    Find out how long it takes to reach a savings or investment goal with a starting balance, regular deposits and compound interest. Free time-to-goal calculator.
  • Interest Rate on $1 Table Creator
    Build a table of compound interest rates needed to grow $1 to chosen future values over a range of periods. Free, universal compound-interest tool.
  • Compound Interest Calculator
    Compute future value, total interest, and effective annual yield (APY) for any principal, rate, and term — periodic, continuous, or simple interest.
  • Rule of 72 Calculator
    Use the Rule of 72 to estimate how many years it takes an investment to double, or the annual return needed. Compare to the exact compound formula. Free tool.
  • Future Value of $1 Annuity (FVIFA) Table Creator
    Generate a Future Value Interest Factor of an Annuity (FVIFA) table for $1 payments by periods and interest rate. Supports ordinary annuity and annuity due.
  • Future Value of Cash Flows Calculator
    Compute the future value of even or uneven cash flow series. Supports compounding, ordinary or annuity-due timing, and per-period growth to your time horizon.
  • Future Value of $1 Table (FVIF) Creator
    Generate a custom Future Value Interest Factor (FVIF) table. Set rows (periods n), columns (rates i), and increments to see how $1 grows by (1+i)^n.
  • Future Value of a Present Sum (Lump Sum) Calculator
    Calculate the future value of a single lump sum invested at a fixed rate with periodic or continuous compounding. Find FV and the growth factor (FVIF).
  • Equivalent Interest Rate Calculator
    Convert a nominal interest rate between compounding frequencies while keeping the effective rate constant. Get the equivalent nominal and effective rates instantly.
  • Effective Annual Interest Rate (APY) Calculator
    Convert a nominal annual rate compounded m times into the effective rate (APY / AER), the total rate over t periods, and the rate per compounding interval.
  • Effective Annual Rate (EAR) Calculator
    Convert a nominal/stated APR into the Effective Annual Rate (EAR). Supports annual, monthly, daily and continuous compounding with the exact formula.

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