Free construction and home-project calculators that finish the job.
Most online calculators give you a single number and wave goodbye. BuildRightCalc calculators end with a Project Pack: the number, plus a printable shopping list with the right waste factor, a step-by-step project checklist, and a cost worksheet — everything you need to actually buy and build.
Five of the most-used calculators are also available in Spanish, and the whole site can be installed like an app and used offline — handy in a supply-yard aisle or on a job site with no signal.
The math uses standard trade formulas and coverage rates, and each calculator explains its assumptions on the page. Quantities are planning estimates: always verify against the manufacturer's coverage charts and your supplier before ordering, and check local building codes for structural work. Waste factors are included where pros include them, and you can see them in the results.
Corrections, calculator requests, and feedback are welcome at ludibble@gmail.com. If a calculator gave you a number that looks wrong, include the measurements you entered — that's the fastest way for us to check the math.