Finance Calculators
Make smarter money decisions with our free, professional-grade financial tools. No sign-ups. No data collection. Just accurate math.
✨ The Ultimate Guide to Financial Independence
A comprehensive, step-by-step roadmap to achieving financial freedom. Includes FIRE strategies, savings optimization, and investment frameworks.
Mortgage Calculator
Calculate monthly payments with PMI, taxes & insurance for 2026 rates.
Investment Calculator
Project compound growth with inflation & tax impact analysis.
Inflation Calculator
Calculate the changing value of the US dollar.
Auto Loan Calculator
Amortization schedule with extra payment analysis.
Retirement Calculator
Plan your retirement with Monte Carlo simulations.
Debt Payoff Planner
Avalanche vs Snowball payoff comparison.
Tax Calculator
Estimate your 2025/2026 Federal Income Taxes.
Time to Millionaire
Calculate exactly when you'll hit 7 figures.
Rent vs Buy
Comprehensive comparison with opportunity cost analysis.
FIRE Calculator
Find your Financial Independence Retire Early number.
Freelance Rate
Calculate your true hourly rate accounting for all costs.
ROI / ROAS Calculator
Measure Return on Investment and Ad Spend.
Savings Goal
Plan and track your savings milestones.
Emergency Fund
Calculate your ideal emergency fund size.
Net Worth Calculator
Add up assets, subtract liabilities, see your true financial picture.
50/30/20 Budget
50% needs / 30% wants / 20% savings — the simplest budget that works.
📚 Learn More
Read our in-depth guides on FIRE, emergency funds, compound interest, and home buying.
Visit the Blog →Seventeen finance calculators, plus a long-form guide to financial independence. Each is built around one decision: what a mortgage really costs per month, how an investment compounds after inflation, how fast a debt disappears with snowball or avalanche payments, what your federal tax bracket means for take-home pay, whether renting or buying wins over your horizon, and how far you are from a FIRE number. Every tool runs in your browser with nothing stored on a server.
Which calculator answers your question?
- “Can I afford this loan?” Use the mortgage calculator for a home, the auto loan calculator when the price includes a trade-in, sales tax and dealer fees, and the general loan calculator for anything else with a fixed rate and term.
- “Which debt should I pay first?” The debt payoff calculator compares the snowball and avalanche methods on your actual balances and rates.
- “How much should I keep in savings?” Size a safety net with the emergency fund calculator, then plan a dated target with the savings goal calculator.
- “Where will my money be in 20 years?” The investment calculator projects growth with monthly contributions, the retirement calculator works in today’s dollars, and the FIRE calculator and time-to-millionaire calculator turn that into a date.
- “What is my money actually worth?” The inflation calculator restates an amount in another year’s dollars using the CPI, and the net worth calculator adds up the whole balance sheet.
- “Am I charging enough?” Freelancers can work back from a take-home target with the freelance rate calculator; marketers can check a campaign with the ROI and ROAS calculator.
- “What will I owe and what can I spend?” The federal income tax calculator applies the brackets to your income, the 50/30/20 budget calculator splits take-home pay, and the rent vs buy calculator compares the full cost of each option.
Getting a number you can trust
Most disagreements between a calculator and a bank, broker or payslip come from the inputs rather than the maths. Use the rate you have actually been offered rather than an advertised one, include fees and taxes where a field asks for them, and enter take-home pay where a tool asks for it instead of your salary. For long-range projections, run the numbers twice, with a cautious return and an optimistic one, and plan around the cautious answer.
Under each calculator you will find the formula it uses, when it is the right tool, a worked example, and the assumptions it makes. These are planning tools, not financial advice: for a decision about your own situation, check the result against the lender’s documents or a qualified adviser.