Make the numbers
make sense.
Plain-English guides with worked examples and a calculator beside every decision.
13 practical guides · no account requiredCompare payments, terms, and what a vehicle really costs.
Is Refinancing Your Car Loan Worth It?
Compare a refinance using the remaining balance, interest rates, fees, and total repayment cost—not just the payment.
What Is the Payment on a $30,000 Car Loan?
See an example monthly payment for a $30,000 auto loan and learn how APR and loan length change the result.
How Much Car Can I Afford?
Work backward from a comfortable transportation budget to estimate an affordable car payment and loan amount.
60-Month vs. 72-Month Car Loan
Compare monthly payments and total interest on 60- and 72-month auto loans using the same balance and APR.
Understand home prices, monthly payments, and mortgage tradeoffs.
Mortgage Payment on a $400,000 House
Estimate the payment on a $400,000 home with a sample down payment, rate, taxes, and insurance.
How Much House Can I Afford?
Estimate a comfortable housing budget using income, recurring debts, upfront cash, and complete ownership costs.
15-Year vs. 30-Year Mortgage
See how loan term changes the monthly payment and total interest on the same mortgage balance and APR.
Solve common percentage questions with formulas you can check.
How to Calculate a Percentage
Learn the basic percentage formula with a clear example and quick ways to check the result.
How to Calculate Percentage Increase and Decrease
Calculate percentage change correctly and understand why reversing a change produces a different percentage.
Explore how time and contributions shape compound growth.
How Extra Payments Help You Pay Off a Loan Faster
Compare an extra $100 monthly payment with your regular loan schedule and see where the interest savings come from.
How Much Should I Save Each Month for a Goal?
Work backward from a target amount and deadline to find a monthly savings contribution.
How Compound Interest Works
Understand how starting balance, contributions, rate, and time combine in a compound-growth estimate.
Compound Interest With Monthly Contributions
See how consistent monthly contributions can change a long-term compound-growth projection.