Financial calculators · 35 tools
Financial calculators
that show their work.
Debt, loans, retirement, and savings — every result includes the formula, clear steps, and a worked example. Private in your browser. No account required.
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Formulas, assumptions, and worked examples sit beside the answer — not buried below it.
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Debt payoff, loans, retirement, and savings tools designed to compare scenarios, not just spit out a number.
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- Debt Payoff PlannerCompare snowball vs avalanche side by side with interest saved and payoff months. Transparent math for up to 4 debts — no signup, runs in your browser.
- Credit Card Payoff CalculatorSee months to debt-free and total interest with every payment assumption shown. Enter balance, APR, and payment — private, free, no account required.
- Retirement Savings CalculatorProject retirement balance with contributions, return, and inflation. Growth chart and step-by-step assumptions included — free, private, no signup.
- FIRE Number CalculatorCalculate your FIRE number using the 4% rule. Enter annual expenses, current portfolio, and savings rate to find your target and timeline to financial.
- Loan / EMI CalculatorMonthly EMI, total interest, and repayment with the full formula and worked example. Free loan math in your browser — no account or uploads.
- Mortgage CalculatorEstimate principal-and-interest from price, down payment, rate, and term. Every assumption and formula shown — free, private, no account needed.
- Savings Goal CalculatorEstimate months to reach a target with starting balance, monthly deposits, and APY. Fully client-side — no account, uploads, or remote storage.
- India Income Tax EstimatorEstimate India income tax under new or old regime for FY 2025–26 / AY 2026–27. Includes standard deduction, 87A rebate, and 4% cess. Not tax advice.
Learn
Money guides that pair with the tools
Personal Finance Guide: Budgeting to Investing
A hub for personal finance: income after tax, budgeting rules, savings goals, debt payoff strategies, and long-term investing — with tools for each step.
Finance & moneyPakistan Income Tax Guide — FBR Slabs
How FBR income tax slabs work for salaried individuals, the tax year timeline (Jul–Jun), when slabs change, and how to calculate your take-home from gross.
Finance & moneyWhat Is Coast FIRE? Financial Independence
Invest enough today for your portfolio to reach your retirement target without future contributions. Explains the Coast FIRE formula, variants, and calculation.
Finance & moneyWhat Is the 4% Rule? Safe Withdrawal Rates
The 4% rule: withdraw 4% of your portfolio annually and it lasts 30+ years. Covers the Trinity Study, sequence-of-returns risk, and when to lower the rate.