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Voltage Drop Calculator

Single-phase or three-phase drop from current, length and the conductor resistance and reactance you supply.

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Rebar Weight Calculator

Weight per metre and total weight from diameter, length and bar count, with editable steel density.

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Section Properties Calculator

Area, second moments, section moduli and radii of gyration for rectangle, circle, hollow and I shapes.

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Bar Bending Schedule Assistant

Cut lengths, weight per mark and totals with a configurable hook allowance and a per-mark table.

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Simple Beam Calculator

Reactions, maximum shear and moment for four load cases, with deflection when E and I are supplied.

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Concrete Quantity Calculator

Volumes for slabs, beams, columns, footings and walls, with waste and a cubic-yard conversion.

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Formwork Quantity Calculator

Contact area by element: slab soffit, beam faces and soffit, column, footing and wall faces.

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Excavation & Backfill Calculator

Trench or pit volume with side slopes, structure deduction, bulking and shrinkage factors.

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Blockwork & Wall Quantity

Net wall area, block count with joints and waste, plus a mortar volume estimate.

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Flooring & Tile Quantity

Tiles, boxes and optional material cost from floor area, tile size, joint and cutting allowance.

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Drawing Scale Calculator

Paper measurement to real size at 1:50, 1:100, 1:200 or any scale, plus the area factor.

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BOQ Quantity Summary

Item, unit, quantity and rate with subtotals, VAT and a priced bill table you can export.

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HVAC Duct Airflow Calculator

Velocity in a rectangular or round duct, or the duct size needed for a target velocity.

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Pipe Flow & Pressure Loss

Velocity, Reynolds number, friction factor, head loss and pressure drop by Darcy–Weisbach.

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Coordinate Converter (WGS84 to UTM)

Latitude/longitude to UTM easting, northing and zone, and back, on the WGS84 datum.

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Slope & Gradient Calculator

Gradient percent, ratio, angle, slope length and H:V batter from a rise and a run.

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Level Book Calculator

Height of instrument, reduced levels, the arithmetic check and misclosure from backsight, intermediate and foresight readings.

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