WORKED EXAMPLES / 14

Everyday decisions, worked through.

Practical examples using the same calculations as our tools. Change the sample inputs and see how your own result differs.

Car & travel

2 worked examples

Car costsWhat does a 50-mile daily commute actually cost?Fuel is only one part of the cost of driving to work.Car costsCan refinancing lower your payment but cost more?A smaller monthly bill is not always a less expensive loan.

Housing & home

2 worked examples

HousingWhat does a $350,000 home cost per month?A mortgage payment includes more than principal and interest.HousingHow much does a space heater cost to run?Convert watts and hours into kilowatt-hours before guessing the bill.

Loans & debt

2 worked examples

DebtWhat is the payment on a $25,000 car loan?A five-year loan can have a manageable payment and still carry substantial interest.DebtWhat changes when you pay an extra $100 on a debt?Extra payments can shorten repayment and reduce interest—if they go toward principal.

Savings & investing

2 worked examples

SavingsWhat could investing $200 per month grow into?See contributions and hypothetical growth separately over a long period.SavingsHow much should a three-month emergency fund hold?Start with essential expenses, then subtract money already saved.

Shopping & everyday

3 worked examples

EverydayWhat do 15% off and sales tax mean at checkout?A markdown and sales tax act on different parts of the price.EverydayWhat do six small subscriptions cost each year?Monthly charges are easier to judge when you annualize them.EverydayHow much does each person owe on a $120 dinner?See how a pre-tax tip and sales tax change the cost of a shared restaurant bill.

Work & business

2 worked examples

WorkWhat hourly rate supports a $60,000 freelance income goal?A target income, business expenses, and realistic billable hours can produce a higher rate than dividing by 2,080 hours.WorkWhat does a $65,000 salary look like on a biweekly paycheck?Separate annual gross pay from estimated take-home pay using the calculator’s explicit 2026 single-filer assumptions.

Math & dates

1 worked example

Quick mathIs a change from 80 to 100 really a 20% increase?Percentage change depends on the starting value, not just the number of units gained or lost.

Every amount in these examples is a hypothetical scenario, not a live interest rate, current national average or personal recommendation.