Free tools

Tools & Calculators

Calculators and planners that turn a few answers into a starting point. They run in your browser, and anything you save stays on your device. Results are estimates for planning, not professional advice.

Most useful

Generator Size Calculator Add up running and starting watts for the things you need to power and get an estimated generator size. Equipment Match Quiz Answer nine quick questions about how you work and get a matched equipment profile and reading list. Maintenance Schedule Planner Build a general service checklist by engine type, usage and operating conditions. Printable.

More tools

Air Compressor Calculator Pick the air tools you run and estimate the CFM and tank size you need. Emergency Power Planner Plan backup power and fuel for an outage, with a printable readiness checklist. Workshop Setup Planner Choose the work zones you need and get a printable setup plan. Service Log Keep a simple service record for several vehicles or machines. Stored only in your browser. Equipment Class Finder Browse common classes of equipment with typical uses, trade-offs and the experience they need.

About these tools

Each tool runs entirely in your browser. Nothing you enter is sent to us, and the only tool that saves anything, the Service Log, keeps its entries in your browser’s own storage on your device. The calculators use typical planning values, such as commonly published appliance wattages and air-tool consumption figures, and the methods that equipment manufacturers describe in their own sizing guides. They give you a starting point for further research and for a conversation with an installer or dealer; they are not a substitute for a professional load calculation or the sizing guidance in your equipment’s manual.