Big Decision Calculators
The biggest financial decisions are the ones disguised as a single price. A house, a car, a degree, a child — each arrives with a number on the tag, and then becomes a stream of costs that runs for years or decades after. These calculators add up the whole stream, so a choice you'll live with for a long time gets made with the real total in front of you, not just the down payment.
The two that reshape your budget most are housing and transportation: the rent vs. buy calculator runs the honest all-in comparison — taxes, maintenance, and opportunity cost included, not just mortgage vs. rent — while the car cost of ownership calculator, the used vs. new car depreciation calculator, and the lease vs. buy car calculator show what a vehicle really costs once gas, insurance, repairs, and depreciation are counted. The life decisions carry their own long tails: the college ROI vs. debt calculator weighs years-to-payoff against starting salary by major, the pet lifetime cost estimator projects the full 15-year commitment by breed, the baby's first year cost calculator maps the cash runway for diapers, formula, and deductibles, and the wedding budget reality check sets percentage guardrails before the venue quotes start climbing. No advice, no signup — just the all-in number, gone when you close the tab.
Calculators in this category
Rent vs Buy Total Cost
Compare the total 10-year cost of renting versus buying a home with mortgage, taxes, insurance, and maintenance.Car Total Cost of Ownership
Calculate the true total cost of owning a car including depreciation, gas, insurance, and maintenance.Used vs New Car Depreciation Race
Compare the 5-year depreciation curves of a new car versus a used car.Lease vs Buy Auto Visualizer
Compare the total cost of leasing cars continuously versus buying and keeping a car long-term.Pet Lifetime Cost Estimator
Estimate the lifetime food and vet costs of a pet based on size, breed, and lifespan.College ROI vs Debt
Estimate how many years it takes to pay off tuition debt based on major and starting salary.Wedding Budget Reality Check
Check if your venue, food, and photo spending fits common percentage limits.Baby First Year True Cost
Calculate the realistic first-year cost of a baby including diapers, formula, and deductible.Common questions
Is it cheaper to rent or buy a home?
It depends on how long you'll stay, local prices, and what you'd earn investing the difference. Buying carries hidden costs renting doesn't — property tax, maintenance, insurance, closing fees — so the "break-even" point is often five to seven years. Below that horizon, renting and investing the gap frequently comes out ahead.
How much does a car really cost beyond the purchase price?
The sticker price is often half the story. Over five years, fuel, insurance, maintenance, repairs, and especially depreciation typically add thousands per year on top of payments. Depreciation alone can erase 40–60% of a new car's value in five years, which is why a lightly used car often costs far less to own overall.
How much should I budget for a baby's first year?
First-year costs commonly run from several thousand to over $15,000 depending on childcare, insurance, and feeding choices. The largest variables are childcare and medical deductibles, not the visible items like diapers and formula. Building a cash runway before the birth — rather than absorbing it month to month — is what prevents the year from generating debt.