Free Financial Calculators
28 tools for retirement planning, investing, net worth tracking, budgeting, and more. No signup required. Built by a former hedge fund manager.
5Wealth & Net Worth
6Investing
5Retirement & FIRE
6Budgeting & Savings
4Debt & Housing
2Tax & Inflation
Frequently Asked Questions
What financial calculators should I use before investing?
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Before investing, use a compound interest calculator to understand growth over time, a retirement calculator to set savings targets, an investment fee calculator to see how fees erode returns, and a net worth calculator to benchmark where you stand.
How accurate are online financial calculators?
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Online calculators provide useful estimates based on the assumptions you input, but they are not predictions. Key variables like returns, inflation, and tax rates can vary. Run multiple scenarios with different assumptions for a more realistic picture.
What is the most important financial calculator?
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The compound interest calculator is arguably the most important because it demonstrates the power of time. Seeing how modest monthly investments grow exponentially over decades is the moment that motivates people to start investing early.
Do I need to pay for financial planning tools?
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No. High-quality financial calculators are available completely free online. Paid tools may offer additional features, but the core calculations — compound interest, retirement projections, fee analysis — are simple math that free tools handle perfectly well.
How do investment fees affect my retirement savings?
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Investment fees compound over time. A 1% annual fee on a portfolio growing at 7% costs roughly 25-30% of your total ending balance over 30 years. Switching from a 1% advisor to a 0.03% index fund could save enough to retire years earlier.
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