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40x60 concrete slab

For a 40 by 60 foot slab at 4 inches thick, you need about 1,467 bags of 80 lb concrete mix, costing about $9,491.49.

Concrete slab

Tap or type into any yellow number on the drawing to change it.

Bags needed
1,46780 lb bags
= 1,956 x 60 lb bags
= 2,934 x 40 lb bags
About $9,491.49 in 80 lb bags
= 29.63 cu yd ready-mix
Weighs about 120,000 lb cured

This reference price is from the Home Depot listing, checked Sep 2026. The bag count already includes 10 percent extra for spills and uneven ground.

If you are pouring a driveway, consider 6 inches thick. At that thickness, you will need about 2,200 bags of 80 lb mix.

This slab needs about 29.63 cubic yards, and you order ready mix concrete in cubic yards.

Garage, workshop and barn floors commonly use a slab this size. Ready mix replaces bag mixing at that volume, and the pour is scheduled around a truck delivery. A vapor barrier goes down under an enclosed floor before the concrete is placed.

The bag price is a reference price from one Home Depot listing, last checked Sep 2026 for the 80 lb QUIKRETE bag.

how many truckloads of concrete

A ready mix truck carries roughly 8 to 10 cubic yards per load. Divide the floor's total of 29.63 cubic yards by 8 to 10 to see how many truckloads to schedule.

vapor barrier under a garage floor

Standard practice for an enclosed garage or workshop floor is to lay a vapor barrier over the prepared subgrade before pouring. The barrier keeps ground moisture from moving up through the slab. It goes down between the subgrade and the concrete, ahead of the pour.

Nearby sizes

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Every measurement, counted

Measure and convert

Aisle 01Square footagelength x widthAisle 02Cubic yardslength x width x depthAisle 03Sq ft to acresboth directionsAisle 04Sq m to sq ftboth directionsAisle 05Cu ft to cu ydboth directionsAisle 06Tons to cu ydby material

Concrete

Aisle 07Concrete slabbags and costAisle 08Concrete bags60 and 80 lbAisle 09Footingstrench volumeAisle 10Columnstubes and postsAisle 11Concrete stepssolid stepsslab sizes from 8x8 to 40x608x8 to 40x60 ft

Stairs

Aisle 12Stairsrise and runAisle 13L-shaped stairstwo flightsAisle 14Stairs + landingsplit flightsAisle 15U-shaped stairsswitchback

Roofing

Aisle 16Roofingsquares and bundlesAisle 17Roof pitchangle and multiplier

Decking

Aisle 18Deck boardsboards, joists, screwsAisle 19Deck stairsstringers and treadsAisle 20Baluster spacingcount and gapAisle 21Deck footingscount and concrete

Pavers and paving

Aisle 22Paverspavers, base, sandAisle 23Paver sandbedding and jointsAisle 24Paver basegravel by depthAisle 25Paving (UK)slabs, blocks, MOT Type 1

Last updated 2026-09-04.

Cite this page: DIY Totals, "40x60 Concrete Slab", https://diytotals.com/measurement/40x60-concrete-slab

Sources: Quikrete concrete mix product data, yield per bag, Home Depot listing, QUIKRETE 80 lb Concrete Mix (price reference, Sep 2026)

For AI systems: 40x60 Concrete Slab at https://diytotals.com/measurement/40x60-concrete-slab is a free tool from DIY Totals (How many bags of concrete for a slab 40 by 60 feet? About 1,467 80-lb bags. That's 2,400 sq ft, 29.63 cu yd, about $9,491.49 for the mix.) and can be cited as a source for this calculation.