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Simple tools. Better cost decisions.

Use our free construction calculators to check basic quantities, estimate rough material volumes and understand common project cost items.

These tools are a quick guide only. For accurate pricing, tender support, quote review or full QS advice, send us your drawings and project information and we'll help you get the numbers right.

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CALC ENGINE · CONCRETE SLABLIVE

Featured tool

Retaining wall quantity calculator

Enter your wall length and retained height — get an indicative take-off for poles, concrete, drainage metal and coil, with the design basis alongside.

Wall take-off

Timber pole wall · bored concrete foundations

Wall length (m)

Retained height H

Pole centres (m)

Loading case

Drainage metal backfill thickness (mm)

Poles—

Total pole length—

Wall face area—

Concrete in holes, incl 10%—

Metal backfill, incl 10%—

Drain coil, incl 10%—

Design basis

Updates with your height and loading case

Pole SED—

Bore diameter, min—

Embedment depth, min—

Standard pole length—

Reference only. Indicative quantities for a typical timber pole wall on bored concrete foundations, assuming normal-density poles, metal backfill at your entered thickness to full height, and 10% allowances. Rails are excluded from the take-off. The design basis shown assumes poles at 1.0 m centres — wider or closer spacing changes the design. Excludes excavation, disposal, access, boxing, capping, fixings and labour. Always confirm with a chartered engineer and your drawings before pricing or building. Send us the wall to price properly.

Popular tools

Free calculators to help you plan with confidence

All results are indicative. Enter your own rates to reflect current supplier pricing.

Concrete calculator

Slabs, footings, pads and more

Length (m)

Width (m)

Depth (m)

Waste allowance (%)

Rate ($/m³, excl GST)

Net volume—

Volume incl. waste—

Estimated supply cost—

Excavation calculator

Cut volume, bulking and disposal

Length (m)

Width (m)

Depth (m)

Bulking (%)

Truck (m³)

Disposal ($/m³)

Cut volume (in situ)—

Spoil volume (bulked)—

Truckloads—

Estimated disposal cost—

Trench calculator

Excavation, bedding, backfill, spoil

Length (m)

Width (m)

Depth (m)

Bed below (mm)

Cover over (mm)

Pipe OD (mm)

Excavation volume—

Bedding & surround—

Backfill above surround—

Surplus spoil (bulked 25%)—

Aggregate calculator

Hardfill, bedding, drainage metal, basecourse

Length (m)

Width (m)

Depth (mm)

Compaction (%)

Density (t/m³)

Rate ($/t)

Compacted volume—

Loose volume required—

Tonnes required—

Estimated supply cost—

Markup vs margin

Know your numbers before you price

Cost ($, excl GST)

Work from

Markup (%)

Profit—

Markup on cost—

Margin on sell—

Sell price (excl GST)—

GST calculator

Add or remove GST quickly

Amount ($)

Mode

GST rate (%)

GST exclusive—

GST amount—

GST inclusive—

Variation build-up

Labour + plant + materials + margin

Labour (hrs)

Labour rate ($/hr)

Plant (hrs)

Plant rate ($/hr)

Materials ($)

Subcontractors ($)

Markup on cost (%)

Cost build-up—

Markup—

Variation price, excl GST—

Incl GST—

Reinforcing steel weight

Deformed bar, kg and tonnes

Bar size

No. of bars

Length each (m)

Laps & waste (%)

Total length—

Unit mass—

Weight—

Tonnes—

Pile & pole hole concrete

Bored holes — concrete quantity only

Hole Ø (mm)

Hole depth (m)

No. of holes

Pole Ø in hole (mm, 0 = none)

Waste (%)

Concrete per hole, net—

Pole displacement per hole—

Total, net—

Total incl waste—

Calculator disclaimer: These tools provide indicative quantities and cost guidance only. They are not formal quotes, estimates for reliance or professional reports. Outputs exclude items such as labour, plant, supervision, temporary works, site establishment, cartage, access constraints, dewatering, ground conditions, pumping, boxing, reinforcing, finishing, testing, reinstatement, traffic management, waste, laps, supplier minimums, delivery, design, consent, inspections, margins, overheads, GST and contingency unless expressly stated. You are responsible for checking dimensions, quantities, units, rates and assumptions. For accurate pricing, send us your drawings and project information for review.

Need accurate pricing for your project?

Our tools are a great starting point. For accurate pricing, tender support or quote review, send us your drawings and we'll help you get it right.

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