One Popular calculators
Buy vs Lease Car Calculator
True monthly cost of leasing vs buying over your horizon — resale equity counted, mileage overage priced.
Cash-Out Refinance Calculator
New payment, total-interest change and break-even when you refinance and take cash out.
HELOC vs Home Equity Loan Calculator
Draw-period interest-only vs a fixed installment loan — total cost of both structures on the same dollars.
Car Total Cost of Ownership Calculator
Five-year cost of owning: payments, depreciation, fuel, insurance and upkeep — per year and per mile.
Repair vs Replace Calculator
Cost per added year for the repair vs the replacement, with the 50%-of-value rule shown as a guideline.
EV vs Gas Calculator
Price premium after incentives vs fuel and maintenance savings — the break-even year, in your prices.
Closing Cost Estimator
Itemized closing costs — lender, title, government, prepaids and escrows — low/mid/high, by state.
Property Tax Calculator
Home value × your state's real average effective rate — all 50 states, exemption and escrow views.
Why One Calculator?
Every tool runs entirely in your browser — your numbers never leave your device.
Every category, one shelf
Guides & articles
Get Out of Debt: Avalanche vs Snowball
Two proven payoff orders, one worked $500-a-month example, and how to pick the one you’ll finish.
Calculate a Mortgage Payment by Hand
The formula, a full worked example, and how to check your lender’s quote in minutes.
Compound Interest, Explained With Real Numbers
How $10,000 and $200 a month actually grow over 10, 20 and 30 years — plus the rule of 72.
Percentages Without a Calculator
The 10% anchor trick, reverse percentages and stacked discounts — mental math that works anywhere.
Why Our Calculators Solve Backwards Too
Most calculators answer one way. Ours solve for whichever number you’re missing — here’s why.
Mathway Alternatives: Free Step-by-Step Math Help
Need the working shown, free? An honest comparison — including where Mathway is stronger.
HELOC: Draw vs Repayment, With Real Numbers
Interest-only payments, then an 82% payment jump — both phases of a $20,000 line, priced.
How to Read an Amortization Schedule
What every column means, where the interest hides, and the month principal finally wins.
Calculator.net Alternatives
Two decades and ~200 tools, honestly credited — and the solve-backwards workflow we built instead.
How Much House Can I Afford?
The 28/36 rule worked end to end — and why your tax bill, not your salary, sets the ceiling.
How to Calculate Overtime Pay
Time-and-a-half and double time in three buckets, with a full worked week at $20 an hour.
CD vs Savings Account
The APY gap on $10,000 over five years, the penalty priced, and the ladder that splits the difference.
💾 My saved calculations
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