Construction tools

Anchor Bolt Layout

Get a schematic and coordinate table immediately after entering values.

Concrete Volume Calculator (m³ / yd³) + Truck Estimate

Sum multiple shape volumes, then calculate waste-included quantity and estimated truck count.

Formwork Area Calculator (m²/ft²)

Calculate member-based formwork area and choose opening deduction rules to get net area.

Material Order Calculator with Waste and Yield

Apply waste or yield and salvage rate to net required quantity, then round up by pack unit.

Paint Quantity Calculator

Calculate pre-dilution and post-dilution paint volume, plus can count, for each coating stage.

Pipe Dimensions Chart (Nominal ↔ OD/ID)

Select a standard set to display Nominal / OD / ID / thickness.

Rebar Pitch Calculator

Compute count ↔ spacing, edge offsets, and coordinate lists in one screen.

Right-Angle Layout Helper (Pythagorean + Diagonal Check)

Compute a theoretical diagonal from side lengths or 3-4-5, then judge measured differences against tolerance.

Roof Area Calculator with Pitch

Calculate sloped installation area from horizontal plan dimensions and roof pitch.

Scaffolding Area Estimate (Perimeter × Height + Accessory Area)

If you have drawings, enter perimeter directly. If not, estimate it from shape and get a one-minute rough quantity.

Slope Grade Calculator (Rise/Run, %, Degrees, 1:n)

Convert rise/run, percent, degrees, and 1:n from any single input mode.

Tile & Flooring Layout Calculator (Minimize Offcuts)

Quickly estimate edge cut widths, required tile count, and waste rate from room and material dimensions.

Tolerance Checker

Judge measurements against your input criteria and auto-generate reasons.

Voltage Drop Calculator (Quick) + Cable Size Guide

Calculate voltage drop (V / %) from voltage, current, distance, and conductor conditions.

m²↔Tsubo↔Tatami↔m↔mm Converter + Quick Table

Calculations are always done in SI units (m / m²), and major units are shown together.