Investment & Savings
Compound interest, ROI, savings goal, FIRE, NPV, IRR and retirement calculators.
Compound Interest Calculator
See your money grow with compounding — daily, monthly, yearly.
Simple Interest Calculator
Compute simple interest: SI = P × R × T / 100 — fast, free, private.
Savings Goal Calculator
How long until you reach your savings goal — with interest.
Inflation Calculator
How much will today's money be worth in N years? Free, private.
FIRE Calculator
Find your FIRE number and how long until you can retire early.
Net Worth Calculator
Assets minus liabilities — your true financial position.
Debt Payoff Calculator
Compare avalanche vs snowball methods and project debt-free date.
Retirement Calculator
Project your retirement nest egg with monthly contributions.
Emergency Fund Calculator
How much should you save for emergencies — and how long to get there?
NPV Calculator
Net Present Value of an investment with cash flows and discount rate.
IRR Calculator
Internal Rate of Return — the discount rate that makes NPV = 0.
Payback Period Calculator
How long until an investment pays for itself.
ROI Calculator
Total and annualized return on any investment.
Stock Profit Calculator
Compute profit, ROI and break-even on any stock trade — including commissions.
Dividend Yield Calculator
Compute dividend yield, annual income and DRIP projections for any holding.
Investment Growth Calculator
Project future value with regular contributions, growth rate, and compounding.
Investment and Savings Calculators
Investment calculators project future value based on contribution schedules, growth rates, and compound interest. They help you understand how saving consistently can build significant wealth over time.
From retirement planning with FIRE calculators to evaluating business investments with NPV and IRR, these tools provide the mathematical foundation for sound financial decisions.
These calculators use standard financial formulas and are designed for personal financial planning. They are not investment advice and should not be used as the sole basis for investment decisions.