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Guides

Short, practical guides that go with the calculators. Every figure is sourced and every example is worked out with the same engine the calculators use.

• How thick should a concrete slab be?Patios, driveways, garage floors and pads: code minimums and what extra thickness costs.
• Bagged concrete vs ready-mixWhere the line falls, bags per yard, weight and cost at 2026 prices.
• How to set fence posts in concreteDepth, hole size, gravel and bags per post, step by step.
• Gravel base under a concrete slabWhy it matters, what the code says and how many tons to order.
• How to measure for concreteThe formula, odd shapes, uneven ground and how much extra to add.