Measure
Inputs stay in the unit system you choose. Conversions retain more precision than the interface displays.
BuiltTally calculation approachNo black boxes.
No black boxes.
Just useful math.
Every result should be understandable, checkable, and honest about what can vary in the real world.
METHOD / STATUSPRODUCTION VERIFICATION PENDING
How the system worksFrom measurement
From measurement
to order quantity.
BuiltTally separates geometric requirements from optional purchasing estimates so users can see where every number comes from.
Calculate
The underlying geometry is calculated before density, waste, or supplier rounding is applied.
Adjust
Where available, optional extra and entered material properties produce planning quantities. Some calculators are pure geometry.
Recommend
Where supported, purchasing estimates round upward using entered supplier increments or whole-unit quantities. They do not prescribe selling terms.
THE BUILTTALLY CALCULATION CHAIN
Measured geometryL × W × D→Optional extraUser allowance→Material mass, where availableVolume × entered density→Optional purchasingEntered supplier terms
Assumptions, stated plainly
Where judgment enters the calculation
Density is optional user input in tools that estimate weight. Use supplier, product or project information. Grading, moisture and material condition affect bulk density; no universal material value is supplied.
Defaults vary by calculator. Optional extra is shown separately and is not a universal compaction allowance. Many material and commercial assumptions start blank; use your project's inputs.
The unrounded geometric requirement remains separate from optional allowance, material properties and purchasing rounding, where applicable. Volume × entered density gives estimated mass. Supplier increments never change the original geometry.
Both systems use the same calculation model. Values are converted at full precision before display rounding.
Geometry tools do not replace local code review. Stairs, roofs, and structural work require field verification and applicable approvals.
All fifteen calculators have automated arithmetic and browser checks. Software testing does not constitute external professional verification. Material properties and manufacturer coverage, when needed, are entered by you. Project, code and engineering checks remain separate.
Review protocol
Transparent planning tools.
Before launchFormula, conversion, boundary-case, content, and responsive interaction review.
After launchReport suspected errors through Contact. Recheck measurements, material assumptions and supplier terms before using an estimate.
Calculator-specific contextFormulas, assumptions and unit behavior are described for each workflow. Review states vary; no general professional approval is claimed. Review dates belong only with documented reviews.