The money toolkit
Money calculators
Four connected toolkits that lead with the answer, not a form: save toward a goal, grow with compound interest, measure past returns, and plan retirement.
Save with a plan
Savings goal calculators
Set a target, find the right monthly amount, and track when you'll reach every milestone.
Savings Goal Calculator
Set any goal, enter your monthly savings, and see exactly when you'll reach it with interest.
Open →How Much to Save Per Month?
Enter your goal and deadline — find the exact monthly contribution you need.
Open →Emergency Fund Calculator
Calculate your 3–6 month cushion target and build a timeline to reach it.
Open →Down Payment Savings Calculator
Save for a home down payment — see your monthly target based on purchase price and timeline.
Open →How Long to Save $10,000?
The classic first milestone — find your timeline with real interest applied.
Open →Millionaire Savings Calculator
How long and how much per month to reach $1 million? See the compounding effect.
Open →Project future growth
Compound interest & growth calculators
Model any savings or investment plan, see the compounding curve, and ask what if?
Measuring a past return? Use the Investment Return Calculator →
Compound Interest Calculator
The flagship — model any savings or investment plan and ask “what if?”
Open →Daily Compound Interest Calculator
Interest added every day — see the APY effect.
Open →Investment Growth Calculator
Project a portfolio with monthly contributions.
Open →Roth IRA Compound Interest Calculator
Project tax-free Roth IRA growth over decades.
Open →CD Compound Interest Calculator
How much a certificate of deposit earns by maturity.
Open →Compound Interest Savings Account Calculator
What a high-yield savings account earns over time.
Open →Monthly Compound Interest Calculator
The default for savings accounts and most mortgages — see the exact month-by-month math.
Open →Quarterly Compound Interest Calculator
Standard for many CDs, corporate bonds, and DRIPs — model your quarterly-compounding account.
Open →Continuous Compound Interest Calculator
The mathematical limit of compounding — uses e^(rt), approaches but beats daily.
Open →Rule of 72 Calculator
Divide 72 by your rate to double your money — estimate and exact answer side by side.
Open →Money Market Calculator
See how a money market account balance grows at current MMA rates.
Open →Compound Interest with Monthly Contributions Calculator
Regular monthly deposits change everything — see the compounding acceleration effect.
Open →Returns & portfolio
Investment return calculators
Calculate what you actually earned, compare to the S&P 500, and find your annualized rate.
Projecting future growth? Use the Compound Interest Calculator →
Investment Return Calculator
Calculate your actual ROI and annualized return, project future growth, or backtest the S&P 500.
Open →ROI Calculator
Total return on investment, annualized rate, and net gain — for any asset.
Open →CAGR Calculator
Compound annual growth rate — compare any two investments on equal terms.
Open →S&P 500 Return Calculator
Project a lump sum at S&P 500 historical average rates — nominal and real.
Open →Plan the finish line
Retirement planning
From "can I retire?" to "how much do I need?", the 401(k), Social Security, the 4% rule, and how long your money lasts.
Retirement Calculator
Can you retire when you want? See your verdict and how to close any gap.
Open →401(k) Calculator
Project your 401(k) with employer match — and see if you’re on track.
Open →How Much Do I Need to Retire?
The nest egg your spending needs — in today’s money.
Open →Retirement Savings Calculator
Are your savings on track for retirement?
Open →Social Security Calculator
How Social Security fits your retirement plan.
Open →401(k) Withdrawal Calculator
How much you can draw from a 401(k), and for how long.
Open →Retirement Savings by Age
How much to have saved by 30, 40, 50, 60.
Open →How Long Will My Money Last in Retirement?
How many years your savings will last.
Open →4% Rule Calculator
The 4% rule: your target nest egg and safe withdrawal.
Open →Retirement Withdrawal Calculator
A sustainable yearly withdrawal, and how long it lasts.
Open →Popular "can I retire?" scenarios
Verdict-first answers for the most-searched age and savings combos.
Can I retire at 55 with $2 million?
The verdict, the income, and how long $2 million lasts from 55.
Open →Can I retire at 60 with $1 million?
The verdict, the income, and how long $1 million lasts from 60.
Open →Can I retire at 62 with $500,000?
The verdict, the income, and how long $500,000 lasts from 62.
Open →Can I retire at 65 with $1 million?
The verdict, the income, and how long $1 million lasts from 65.
Open →