Free browser-only tool
Can I afford this calculator
Estimate your safe-to-spend amount and see whether a purchase leaves enough room after bills, plans, savings, and your chosen buffer.
Enter your numbers
All calculations happen in your browser. This static page does not store your financial inputs or send them to a server.
Try a scenario
Load sample numbers for common situations. Presets only fill the form in your browser.
Decision rules
- Yes: remaining after purchase is $25 or more.
- Maybe: remaining after purchase is at least $0 but less than $25.
- No: the purchase needs more room than the current safe-to-spend estimate.
Privacy note
This calculator is static JavaScript. It does not create an account, connect to your bank, store your entries, or transmit your entries by default.
Dragon Budget is a budgeting aid, not financial advice.