Car decisions
Compare vehicles by total ownership cost instead of monthly payment alone.
Make the numbers useful
Each tool is designed to explain the tradeoff, show what drives the result, and give you a decision score.
Lease vs buy
Compare cash outlay, equity, mileage, and ownership horizon.
New vs used car
Account for depreciation, repairs, financing, and warranty value.
EV vs gas car
Compare purchase price, fuel, charging, maintenance, and incentives.
Car affordability
Set a sustainable budget using income and total monthly cost.
Total cost of ownership
See depreciation, financing, insurance, fuel, and repairs together.
How to use car decisions tools
Begin with the tool that matches the decision in front of you and enter figures you can verify. Test a realistic case, a conservative case, and the point where your preferred option stops working. That range is usually more useful than a single optimistic result.
Review the assumptions behind each result—especially time horizon, taxes, recurring costs, financing, and opportunity cost. The tools in this driving collection are designed to expose those tradeoffs so you can compare choices consistently, not to predict an exact outcome.
Not sure where to start?
Browse all decision categories or use the classic calculator library for a quick one-number calculation.