Practical decisions in the workshop
The tools help you measure lumber, estimate material quantities, plan cuts, lay out parts and check material costs. The focus is on making the inputs, units and assumptions understandable before you act on a result.
Understand the method behind a result
Calculator pages explain their inputs, calculation method, worked examples and limitations. Numeric examples are checked against the calculation functions during development. That is a software check, not professional certification or a guarantee for every material or workshop setup.
Nominal lumber dimensions, actual dimensions, waste and yield mean different things. Keep the measurement basis explicit, and check the instructions for your specific material, hardware or finish.
Material estimates have limits
These tools do not establish structural capacity, building-code compliance, machine safety or supplier invoice rules. Check critical dimensions before cutting, verify material and product information, and obtain qualified advice when a task requires it.
An independent project
I maintain the site and handle feedback by email. If you find an error, a clear example helps me reproduce and review it.