Calculators
Financial calculators
Interactive tools for budgeting, saving, debt payoff, mortgages, retirement, and more. Everything runs in your browser — nothing is sent anywhere.
Compound interest calculator
See how small monthly contributions grow over decades. Test different rates, contribution levels, and horizons in seconds.
Mortgage calculator
Estimate monthly payment, total interest, and payoff schedule for any mortgage. Test rate, term, and down payment scenarios.
Retirement calculator
Project your retirement portfolio and required annual savings. Adjust for age, income, current savings, and target retirement year.
Budget calculator (50/30/20)
Test the 50/30/20 rule against your real income. See recommended amounts for needs, wants, and savings, plus how far off you currently are.
Debt payoff calculator
Compare avalanche and snowball payoff strategies for your real balances. See total interest, months to payoff, and payoff order.
FIRE calculator
Project years to Financial Independence given your saving rate, expenses, and investment returns. Test Coast FIRE and Lean FIRE variants.
Inflation calculator
See what today's dollars will be worth in 10, 20, or 30 years at different inflation rates.
Emergency fund calculator
Find how much you should have in your emergency fund based on your monthly essentials and income stability.
Net worth calculator
Add up everything you own, subtract everything you owe, and see your true financial position at a glance.
Investment return calculator
Project the future value of a lump sum plus regular contributions at any expected annual return.
Loan calculator
Estimate monthly payment and total cost for any amortising loan — personal, auto, or student.
Savings goal calculator
Find the monthly amount you need to save to hit a specific goal by a target date, given a starting balance and expected return.
Dollar-cost averaging calculator
Model how regular fixed-dollar investments perform through market ups and downs.
SIP calculator
Project the future value of a systematic investment plan with monthly contributions.
CAGR calculator
Calculate the compound annual growth rate between a starting and ending value.
ROI calculator
Compute total and annualised return on any investment.
Dividend yield calculator
Calculate the dividend yield of a stock from its share price and annual dividend.
Dividend reinvestment calculator
See how reinvesting dividends over time compounds into meaningful wealth.
Position size calculator
Calculate how many shares to buy based on account size, risk tolerance, and stop-loss.
Risk-reward calculator
Evaluate the reward-to-risk ratio and expected value of any trade setup.
Portfolio allocation calculator
Rebalance a portfolio across stocks, bonds, and cash to hit target weights.
P/E ratio calculator
Calculate a stock's price-to-earnings ratio and earnings yield.
PEG ratio calculator
Growth-adjusted P/E — combines valuation and growth in one number.
Market capitalisation calculator
Compute a company's market cap and classify it by size category.
Currency conversion calculator
Convert amounts between currencies with an exchange rate and optional FX fee.