Pour Concrete Right,
Order with Margin.
Free concrete calculators: slab and footing volumes, 80-lb bag counts, ready-mix truck math, and pour cost estimates.
Cubic Yard Conversions
Convert length, width, and depth in inches straight to exact cubic yards without unit conversion errors.
60lb & 80lb Pre-Mix Sizing
Calculate the exact number of bags needed for home pours versus ordering ready-mix transit trucks.
Excavation & Spillage
Built-in 10% safety margin covers sub-base settling, grade variations, and wheelbarrow spillage.
ConcreteMath Calculators
Concrete Slab Calculator
Cubic yards for a slab — length, width, thickness, and the 10% overage that keeps the pour continuous.
Concrete Bag Calculator
80-lb and 60-lb bag counts for any volume — with the honest ready-mix crossover point.
Footing & Sonotube Calculator
Concrete for post holes and footing tubes — by diameter and depth, with the bell and collar options.
Concrete Cost Calculator
Ready-mix vs bag pricing for your volume — delivery fees, short-load charges, and the finish-work materials included.
Building Code & Methodology
The ready-mix phone call, word for word
What to say, what they will ask, and the four numbers to have ready before dialing.
Why concrete cracks, and which cracks matter
Shrinkage, control joints, and the difference between cosmetic and structural.
12 mistakes people make with concrete projects
The recurring errors we see in concrete projects — what causes each one, and the habit that prevents it.