All Investment Calculators Tools
Australian Superannuation Calculator
Project your super balance at retirement with employer contributions, voluntary top-ups, investment returns, and insurance fees
Compound Interest Calculator
Calculate future value, total interest earned, and see year-by-year growth with visual charts — free, no signup required
Credit Card Payoff Calculator
See exactly when you'll be debt-free, how much interest you'll pay, and how extra payments save you money — free, no signup required
Debt Payoff Calculator
Compare the snowball and avalanche strategies side-by-side — see total interest paid, months to debt-free, and payment order for each method
Dollar-Cost Averaging Calculator
Compare DCA vs lump sum investing — see which strategy wins, view monthly schedules, and understand the trade-offs. Free, no signup required.
Emergency Fund Calculator
Find your target emergency fund, see your gap, and plan monthly savings to get there — free, private, no signup
FIRE Number Calculator
Calculate your Financial Independence / Retire Early number — Regular, Lean, Fat, and Coast FIRE — with year-by-year projections
Inflation Impact Calculator
See how inflation erodes your purchasing power over time and how much you'll need to maintain today's value
Investment Fee Drag Calculator
Compare two funds side by side and see exactly how much expense ratios cost you over time — free, no signup required
Loan Amortization Calculator
Calculate monthly payments, total interest, and view a full amortization schedule — free, no signup required
Net Worth Calculator
Add your assets and liabilities to instantly calculate your net worth — free, private, no signup required
RMD Calculator
Calculate your Required Minimum Distribution from Traditional IRAs, 401(k)s, and inherited accounts using IRS Uniform Lifetime Table
Roth vs Traditional IRA Calculator
Compare after-tax retirement outcomes for Roth and Traditional IRA or 401(k) contributions side by side
Rule of 72 Calculator
Instantly calculate how long it takes to double your investment at any interest rate using the Rule of 72 and exact formulas
Savings Goal Calculator
Find out how long it takes to reach your savings goal — or how much you need to save each month to hit a target date
Social Security Break-Even Calculator
Compare claiming at 62, 67 (FRA), and 70 to find your break-even ages and maximize lifetime benefits
Investment Calculators on FastTools are free, browser-based tools designed to help you get quick answers without signups or downloads. Every calculator runs entirely in your browser — your data never leaves your device.
Whether you're planning, budgeting, or just curious, these tools are built to be fast, accurate, and private. Pick any tool below to get started instantly.
Frequently Asked Questions
Are these investment calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.