Free financial calculators
that do the math for you
78 accurate calculators for every financial decision. No signup, no ads, no paywalls. Get your results by email as a free PDF report.
Browse by Category
Find the right calculator for any financial decision
Personal Finance
Budget, FIRE number, savings rate, net worth
12 toolsMortgage & Real Estate
Affordability, payments, rent vs buy, ROI
10 toolsDebt & Credit
Payoff planner, credit card, balance transfer
10 toolsInvesting & Wealth
Compound interest, retirement, ETF fees
14 toolsInsurance
Life, disability, auto, health coverage
8 toolsBusiness & Freelance
Break-even, freelance rate, LLC vs S-Corp
10 toolsTax
Brackets, capital gains, SE tax, deductions
8 toolsCrypto & Alternative
Profit/loss, DCA, staking, tax liability
8 toolsMost Popular Calculators
Used by thousands of people every day
Compound Interest Calculator
Watch your money grow over time
Used 62k times
Debt Payoff Planner
Snowball vs avalanche comparison
Used 48k times
FIRE Number Calculator
Find your financial independence number
Used 58k times
Mortgage Payment Calculator
Monthly mortgage payment breakdown
Used 67k times
Net Worth Calculator
Track assets, liabilities, and net worth
Used 42k times
Tax Bracket Calculator
2025 federal tax with FICA breakdown
Used 64k times
How It Works
Pick a calculator
Choose from 78 free financial calculators across 8 categories.
Enter your numbers
Results update in real-time as you type — no calculate button needed.
Get your PDF report
Enter your email to receive a detailed PDF with results, charts, and action steps.
Free Financial Calculators for Every Situation
FinancialTools provides 78 free, accurate financial calculators covering every major financial decision you will face — from calculating your FIRE number and mortgage affordability to optimizing your tax strategy and planning for retirement.
Unlike other financial calculator sites, FinancialTools requires no signup, shows no ads, and provides your results instantly as you type. Every calculator uses verified formulas documented inline, so you can understand exactly how your results are calculated.
Each calculator includes a free PDF report delivered by email, a FAQ section with 5-7 expert-written answers to common questions, a formula explanation section, and links to related tools. Whether you are planning to buy a home, pay off debt, build wealth, or plan for retirement, FinancialTools has the calculator you need.