Calculators
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Concrete take-off
Cubic yards, rebar, placement, pumping, QA testing and haul-off — the estimator that covers all 10 modules.
Included with OlynxInstant results
What it asks and what it returns
Data in, numbers out.
You give it
Structure type (slab, footing, wall, column, stairs)
Dimensions (length × width × thickness)
Rebar schedule (#3-#8, spacing) + optional epoxy coating
Placement method (direct chute, wheelbarrow, pump truck)
Climate conditions + curing requirements
Subgrade depth for soil haul-off
Engine
It returns
Gross volume + purchase volume with waste factor
Total rebar LF + tonnage + tie wire
Pump truck cost if distance requires it
QA testing (cylinders, slump, air content) — cost + frequency
Soil tonnage to remove + haul-off cost
Labor with climate-adjusted productivity
Behind the math
How it calculates.
formula.md
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// Calculates geometric volume × density factor per structure type.
// Applies swell factor (1.20-1.45) for subgrade haul-off.
// Rebar uses spacing schedule × total LF with 5-8% waste.
// Climate triggers adjust curing time + blanket/heater costs..
Same engine the Olynx app uses
When to use it
What it's good for.
01
Quote a driveway without under-buying (or over-buying) yardage
02
Decide between direct chute vs pump truck by distance
03
Estimate excavation haul-off + correct dumpster
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