Simple Interest Calculator
Calculate simple interest and final balance for a principal over any period.
Loans, investing, and the math behind everyday money decisions.
Run the numbers on mortgages, loans, credit cards, investments, and retirement — with transparent formulas and editable assumptions.
Calculate simple interest and final balance for a principal over any period.
Project investment growth with regular contributions, any compounding frequency, and adjustable rate.
Compute the compound annual growth rate (CAGR) — the smooth annual return that would take a starting amount to an ending...
Compute the net present value of an investment from a series of cash flows and a chosen discount rate. Negative numbers...
Find the internal rate of return — the discount rate at which the net present value of a project equals zero.
Calculate what a bond is worth today by discounting its coupon payments and face value at the prevailing market yield.
Work out how much you need to save each month to reach a savings goal by a target date — assuming a steady interest rate...
Compute the cap rate of a rental — the unlevered annual return — by dividing net operating income by purchase price.
Calculate the cash-on-cash return of a leveraged real-estate deal: annual pre-tax cash flow divided by total cash invest...
Convert a nominal interest rate and compounding frequency into the effective annual percentage yield.
Compute the annual dividend yield of a stock as the ratio of the annual dividend per share to the current share price.
Compute the pre-tax (taxable) yield that would be required to match a tax-free municipal-bond yield, given your marginal...
Compute your new share count and per-share price after a forward stock split (e.g. 2-for-1 doubles shares and halves the...
Project how much a present amount grows to after a given period at a fixed compound rate.
Estimate the years it takes for an investment to triple at a given annual return using the rule of 115 (years ≈ 115 / ra...
See how a portfolio grows when you invest a fixed amount on a regular schedule and let it compound at an expected return...
Work out how much a future amount is worth today, discounted at a chosen rate.
Calculate return on investment, annualized ROI, and net gain from initial cost and ending value.
Compute the present value of a perpetuity (a perpetual fixed cash flow) given the per-period cash flow and the discount...
Compute the profit, total return, and percentage return on a stock trade after factoring in commissions and fees on both...
Compute the fair value of a stock using the Gordon Growth (constant-growth) dividend discount model: P = D₁ / (r − g), w...
Compute the current yield on a bond, defined as the annual coupon income divided by the current market price (does not a...
Convert a past amount into present-day purchasing power, or project a future amount at an assumed inflation rate.
Compute the payback period of an investment given an upfront cost and constant annual cash inflow. Reports the simple an...