Estimate monthly car lease payments from price, residual, and money factor. Know a $30k car's true monthly cost — free, local, no signup.
Calculate monthly car loan payments, total interest, and total cost. Enter loan amount, rate, and term for a complete auto financing picture. Figures never leave your device — every calculation runs locally in your browser.
Compute gross margin from revenue and costs — know exact profitability. A $30 sale at $20 cost margins 33% — free, local, no signup.
Compare buy net cost against rent total over a timeframe you set, from home price, down payment, mortgage rate, and monthly rent. Figures never leave your device — every calculation runs locally in your browser.
Estimate API bills from request volumes and price-per-million — OpenAI and Stripe presets included. Forecast a 1M-request month before committing — local math, free, no signup.
Compute return on ad spend from revenue and cost — know every dollar's payback. Prove 4:1 ROAS before scaling — free, local, no signup.
Depreciation (price minus residual, divided by months) plus rent charge (money factor times sum). A $30k car at 60% residual over 36 months leases far below its loan payment.
Multiply by 2400: 0.00250 equals 6% APR. Dealers quote factors to obscure rates — convert instantly.
Lease for always-new cars and business write-offs; buy for long holds and high mileage. Compare total 3-year costs, not just monthlies.
No — math runs locally in your browser. Numbers never leave your device.
Last updated October 2026