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All calculators, organized by goal

Pick the calculator that matches what you're trying to figure out. All free, no sign-up, instant results.

Build wealth & invest

Project compound growth, plan retirement, and set wealth-building goals.

Compound interest calculator
See your money grow with monthly contributions and any rate.
Compound investment calculator
Index fund growth at historical S&P 500 rates.
Monthly contribution growth
Recurring deposits + compound math combined.
Save $1M in 20 years
Exact monthly savings to reach a million.

Plan retirement

Find your FI number, test withdrawal rates, and model early-retirement scenarios.

Retirement calculator
When can you retire? The 4% rule applied to your numbers.
Retire by 45 (FIRE)
Aggressive savings rates for early retirement.

Loans & mortgages

Mortgage payments, car loans, and student loans — with full amortization tables.

Mortgage calculator
Monthly payment, total interest, and amortization schedule.
Car loan calculator
Auto loan payments and total cost.
Student loan calculator
Federal and private loan payoff math.
Simple interest calculator
For non-compounding loans, T-bonds, and CDs.

Pay off debt

Snowball vs avalanche, multi-debt strategies, and aggressive payoff scenarios.

Debt snowball calculator
Map the fastest path out of multiple debts.
Snowball vs avalanche
Side-by-side comparison with real numbers.
Pay off $50K credit card debt
Real timelines for high-balance card debt.

Save for goals

Down payment, college fund, emergency fund, or any specific target.

Savings goal calculator
How much to save monthly for any target.
Inflation calculator
Real purchasing power over time.

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