Finance Calculators
Mortgage, inflation, compound interest, loan prepayment, refinance, car lease and solar payback calculators. Clear answers with the math shown, no sign-up.
Every tool here runs on your device unless its privacy label says otherwise.
Money
10 tools
- Inflation CalculatorWhat a dollar from any year since 1913 is worth today, your own inflation rate, and whether your raise kept up
- Mortgage CalculatorMonthly payment, total interest and your payoff date
$2,453/moon a $400k home, 20% down, with tax and insurance
- Compound Interest CalculatorWatch savings grow, reach a goal, or see the cost of waiting
$300,851$500 a month for 20 years at 7%
- Loan Prepayment CalculatorHow much sooner extra payments make you debt-free
12½ years soonerpaying $500 extra a month
- Net Worth Percentile CalculatorWhere your net worth ranks for your age, on the Fed’s 2025 survey of US families
- Income Percentile CalculatorWhere your household income ranks for your age, on the Fed’s 2025 survey of US families
- Retirement Savings Percentile CalculatorWhere your 401(k) and IRA balances rank for your age, counting the many families with none
- Prepayment vs Refinance CalculatorPay extra or refinance? A fair side-by-side verdict
Refinancesaves $42,882 more than paying extra
- Car Buy vs Lease CalculatorBuy or lease, with net cost and a check of the dealer quote
Buy$10,297 less than leasing over 5 years
- Solar Panel ROI CalculatorWhen solar pays for itself, from your bill and state
6.9-year paybackthen $61k ahead over 25 years
Finance Calculators
Net Worth Percentile Calculator
Where your net worth ranks for your age, on the Fed’s 2025 survey of US families
OpenIncome Percentile Calculator
Where your household income ranks for your age, on the Fed’s 2025 survey of US families
OpenRetirement Savings Percentile Calculator
Where your 401(k) and IRA balances rank for your age, counting the many families with none
OpenInflation Calculator
What a dollar from any year since 1913 is worth today, your own inflation rate, and whether your raise kept up
Open$194.53for $100 of 2000 goods, in August 2026
Mortgage Calculator
Monthly payment, total interest and your payoff date
Open$2,453/moon a $400k home, 20% down, with tax and insurance
Compound Interest Calculator
Watch savings grow, reach a goal, or see the cost of waiting
Open$300,851$500 a month for 20 years at 7%
Loan Prepayment Calculator
How much sooner extra payments make you debt-free
Open12½ years soonerpaying $500 extra a month
Prepayment vs Refinance Calculator
Pay extra or refinance? A fair side-by-side verdict
OpenRefinancesaves $42,882 more than paying extra
Car Buy vs Lease Calculator
Buy or lease, with net cost and a check of the dealer quote
OpenBuy$10,297 less than leasing over 5 years
Solar Panel ROI Calculator
When solar pays for itself, from your bill and state
Open6.9-year paybackthen $61k ahead over 25 years
Explore other categories
- Body Measurements8 tools
- Diabetes & Weight Loss5 tools
- Fitness & Yoga10 tools
- Math Calculators6 tools
- Unit Converters2 tools
- Coding Lessons3 tools
- Grades & Worksheets4 tools
- Image Tools6 tools
- Document Tools6 tools
- Planners & Charts4 tools
- Clothing & StyleOutfit of the Day
- Developer Tools9 tools
- Engineering Calculators5 tools
- Device TestsDevice Test
- AI Tools5 tools
- Timers5 tools
- Time & Date2 tools