80 lb<\/td> Patios, larger slabs, driveway repairs<\/td> 0.60 ft\u00b3<\/td> 45<\/td> Fewest bags, heaviest lift, easiest to strain your back<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nVerify the yield on your product before ordering. These figures come from published data for standard concrete mixes and do not automatically apply to every bag on the shelf.<\/p>\n\n\n\n
How Many 80-lb Bags of Concrete Are in a Yard?<\/h2>\n\n\n\n Divide the cubic yard by the bag’s yield:<\/p>\n\n\n\n
27 \u00f7 0.60 = 45<\/p>\n\n\n\n
That gives approximately 45 80-lb bags for one cubic yard, before any extra material, based on a listed yield of 0.60 cubic feet per bag. Flip the math and one 80-lb bag holds about 0.60 \u00f7 27 = 0.022 cubic yards.<\/p>\n\n\n\n
How Many 60-lb Bags of Concrete Are in a Yard?<\/h2>\n\n\n\n 27 \u00f7 0.45 = 60<\/p>\n\n\n\n
So one cubic yard takes approximately 60 60-lb bags before extra material, based on a listed yield of 0.45 cubic feet per bag.<\/p>\n\n\n\n
How Many 40-lb Bags of Concrete Are in a Yard?<\/h2>\n\n\n\n 27 \u00f7 0.30 = 90<\/p>\n\n\n\n
That works out to approximately 90 40-lb bags per cubic yard before extra material, using a listed yield of 0.30 cubic feet per bag. Ninety bags is a lot of mixing, which is why most people move up to larger bags or price ready-mix once a project grows.<\/p>\n\n\n\n
How to Calculate Bags of Concrete From Dimensions<\/h2>\n\n\n\nStep 1: Measure Length, Width, and Thickness<\/h2>\n\n\n\n Measure the finished space you plan to fill, not the rough hole. Keep every dimension in the same unit, and convert thickness from inches to feet:<\/p>\n\n\n\n
Thickness in feet = thickness in inches \u00f7 12<\/p>\n\n\n\n
A 4-inch concrete slab is 4 \u00f7 12 = 0.333 feet thick. Check thickness in several places, since a subgrade that dips even half an inch adds real volume.<\/p>\n\n\n\n
Step 2: Find Project Volume in Cubic Feet<\/h2>\n\n\n\n Cubic feet = length (ft) \u00d7 width (ft) \u00d7 depth (ft)<\/p>\n\n\n\n
Break irregular projects into simple rectangles and circles, calculate each one, then add the results together.<\/p>\n\n\n\n
Step 3: Convert to Cubic Yards<\/h2>\n\n\n\n Cubic yards = cubic feet \u00f7 27<\/p>\n\n\n\n
You need this figure to compare bag pricing against a ready-mix quote, because suppliers sell by the yard.<\/p>\n\n\n\n
Step 4: Divide by the Bag’s Listed Yield<\/h2>\n\n\n\n Bags required = project cubic feet \u00f7 bag yield in cubic feet<\/p>\n\n\n\n
Use the yield printed on your bag or its technical data sheet. Manufacturer instructions follow this same method: work out cubic feet, then divide by the yield for your bag size.<\/p>\n\n\n\n
Step 5: Add Waste and Round Up<\/h2>\n\n\n\n Add a 5% to 10% material allowance, then round up to whole bags. You cannot buy 55.6 bags, and a partial bag mixed at the wrong ratio is not usable concrete. Running short mid-pour is the worse outcome, because fresh concrete stiffens while you drive to the store, and a delayed fill creates a cold joint where the two pours never bond properly.<\/p>\n\n\n\n
Real-World Concrete Bag Examples<\/h2>\n\n\n\n Every example below assumes a standard concrete mix with the listed yield noted in the calculation.<\/p>\n\n\n\n
Example 1: 10 ft \u00d7 10 ft Patio Slab at 4 Inches Thick<\/h2>\n\n\n\n\nThickness in feet: 4 \u00f7 12 = 0.333 ft<\/li>\n\n\n\n Volume: 10 \u00d7 10 \u00d7 (4 \u00f7 12) = 33.33 cubic feet<\/li>\n\n\n\n Cubic yards: 33.33 \u00f7 27 = 1.23 cubic yards<\/li>\n\n\n\n Bags required at 0.60 ft\u00b3 per 80-lb bag: 33.33 \u00f7 0.60 = 55.56, so 56 bags before extra material<\/li>\n\n\n\n With 10% extra: 55.56 \u00d7 1.10 = 61.12, so 62 bags<\/li>\n<\/ul>\n\n\n\nThis result assumes a bag yield of 0.60 cubic feet, which matches the published figure for standard 80-lb concrete mix. Independent estimating tools reach the same ballpark for this slab, at roughly 1.23 cubic yards and about 56 80-lb bags.<\/p>\n\n\n\n
Example 2: 4 ft \u00d7 20 ft Sidewalk at 4 Inches Thick<\/h2>\n\n\n\n\nVolume: 4 \u00d7 20 \u00d7 (4 \u00f7 12) = 26.67 cubic feet<\/li>\n\n\n\n Cubic yards: 26.67 \u00f7 27 = 0.99 cubic yards<\/li>\n\n\n\n Bags required at 0.45 ft\u00b3 per 60-lb bag: 26.67 \u00f7 0.45 = 59.26, so 60 bags before extra material<\/li>\n\n\n\n With 10% extra: 59.26 \u00d7 1.10 = 65.19, so 66 bags<\/li>\n<\/ul>\n\n\n\nThis assumes a listed yield of 0.45 cubic feet per 60-lb bag. A walkway this size sits right at one cubic yard, which is exactly the point where it pays to phone a local supplier and compare a small ready-mix load against 66 bags.<\/p>\n\n\n\n
Example 3: Fence-Post Hole<\/h2>\n\n\n\n For a round hole, use the cylinder volume formula, where r is the radius and h is the depth:<\/p>\n\n\n\n
Volume = \u03c0r\u00b2h<\/p>\n\n\n\n
Take a hole 10 inches across and 36 inches deep:<\/p>\n\n\n\n
\nRadius: 10 \u00f7 2 = 5 inches, or 5 \u00f7 12 = 0.417 ft<\/li>\n\n\n\n Depth: 36 \u00f7 12 = 3 ft<\/li>\n\n\n\n Volume: 3.1416 \u00d7 0.417\u00b2 \u00d7 3 = 1.64 cubic feet<\/li>\n\n\n\n Bags at 0.60 ft\u00b3: 1.64 \u00f7 0.60 = 2.73, so 3 bags per hole<\/li>\n<\/ul>\n\n\n\nThe post itself takes up space inside the hole, so the real concrete needed is lower. A 4×4 post, which measures about 3.5 inches square, occupies roughly 0.26 cubic feet over that 3-foot depth, trimming the fill to about 1.38 cubic feet, or 2.3 bags. Many people ignore this and let the post volume act as a built-in cushion.<\/p>\n\n\n\n
This is a material estimate only. Post-hole depth, diameter, and footing design for load-bearing or braced structures should follow local building codes, and manufacturer guidance says the same.<\/p>\n\n\n\n
Useful Coverage Reference Chart<\/h2>\n\n\n\n All rows below assume a bag yield of 0.60 cubic feet per 80-lb bag, matching published data for standard 80-lb concrete mix.<\/p>\n\n\n\nSlab size and thickness<\/th> Cubic feet<\/th> Cubic yards<\/th> 80-lb bags before waste<\/th> Bags with 10% extra<\/th><\/tr><\/thead> 6 ft \u00d7 6 ft at 4 in<\/td> 12.00<\/td> 0.44<\/td> 20<\/td> 22<\/td><\/tr> 8 ft \u00d7 8 ft at 4 in<\/td> 21.33<\/td> 0.79<\/td> 36<\/td> 40<\/td><\/tr> 10 ft \u00d7 10 ft at 4 in<\/td> 33.33<\/td> 1.23<\/td> 56<\/td> 62<\/td><\/tr> 10 ft \u00d7 12 ft at 4 in<\/td> 40.00<\/td> 1.48<\/td> 67<\/td> 74<\/td><\/tr> 10 ft \u00d7 10 ft at 6 in<\/td> 50.00<\/td> 1.85<\/td> 84<\/td> 92<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nThese are estimates. Enter your actual bag yield into the calculator above, since a different mix changes every number in this chart.<\/p>\n\n\n\n
Bagged Concrete vs. Ready-Mix Concrete<\/h2>\n\n\n\nFactor<\/th> Bagged concrete<\/th> Ready-mix delivery<\/th><\/tr><\/thead> Best use cases<\/td> Post holes, repairs, small pads, staged work you can pour over days<\/td> Larger slabs, driveways, single continuous pours<\/td><\/tr> Labor and time<\/td> You haul, mix, and place every bag; slow with few helpers<\/td> Arrives mixed; the clock starts the moment the truck does<\/td><\/tr> Access and logistics<\/td> Bags fit through gates, up stairs, and into backyards<\/td> Needs truck access or a pump; chute reach is limited<\/td><\/tr> Cost variables<\/td> Local bag price, number of bags, mixer rental, your own time<\/td> Price per cubic yard, delivery, possible short-load and waiting charges<\/td><\/tr> Waste and cleanup<\/td> Buy in stages, keep unopened bags dry; you clean the mixer<\/td> Leftover concrete in the truck is still charged; less tool cleanup<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nBagged concrete tends to win on convenience for small or awkward-access work, since you mix only what you can place at once. Ready-mix is worth pricing when the volume climbs or when the pour must happen in one continuous placement, because hand-mixing dozens of bags stretches the timeline and risks cold joints.<\/p>\n\n\n\n
There is no universal yardage where ready-mix becomes the cheaper choice. Ready-mix material pricing and short-load charges vary by market, and published cost ranges are only rough guides. Ask your local supplier three questions before deciding: the price per cubic yard, the minimum load, and any short-load or waiting fees that apply to your order.<\/p>\n\n\n\n
Factors That Change How Many Bags You Need<\/h2>\n\n\n\n\nThe product’s listed finished yield, which is the single biggest variable<\/li>\n\n\n\n Mix type and formulation, since standard, fast-setting, high-strength, crack-resistant, and topping mixes list different yields<\/li>\n\n\n\n Final slab thickness, where an extra half inch on a 10×10 pad adds over 4 cubic feet<\/li>\n\n\n\n Uneven excavation or a soft subgrade that swallows extra concrete<\/li>\n\n\n\n Form movement, bulging, or overfill at the edges<\/li>\n\n\n\n Spillage, plus the residue left clinging inside a mixer or wheelbarrow<\/li>\n\n\n\n Posts, rebar, mesh, sleeves, or other embedded items that displace concrete<\/li>\n\n\n\n The waste allowance you choose, typically 5% to 10% for residential work<\/li>\n\n\n\n Product and unit differences between countries, including metric bag sizes<\/li>\n<\/ul>\n\n\n\nCommon Mistakes to Avoid<\/h2>\n\n\n\n\nTreating bag weight as finished concrete volume. An 80-lb bag is 80 pounds of dry material, and its yield is a separate published number.<\/li>\n\n\n\n Forgetting to convert inches to feet. Using 4 instead of 0.333 overstates a slab twelvefold.<\/li>\n\n\n\n Buying exactly the mathematical minimum with no allowance for spillage or a low spot.<\/li>\n\n\n\n Rounding bag counts down. Always round up to the next whole bag.<\/li>\n\n\n\n Assuming every 60-lb or 80-lb product yields the same volume. Some specialty mixes state very different figures.<\/li>\n\n\n\n Confusing concrete mix with cement, mortar, grout, or sand mix. Mortar is designed to bond masonry units, not to be poured as structural concrete, and sand\/topping mix is meant for thin overlays rather than full-depth slabs.<\/li>\n\n\n\n Using a material estimator as structural engineering guidance.<\/li>\n\n\n\n Ignoring safe lifting, mixing instructions, and label safety warnings. Manufacturers direct users to wear impervious gloves, eye protection, and a mask, because wet mix can cause severe skin burns and dust exposure carries lung risks.<\/li>\n<\/ol>\n\n\n\nFor Readers Outside the US<\/h2>\n\n\n\n US projects are usually planned in cubic yards, feet, inches, and pound-based bag sizes such as 40, 60, and 80 lb. In Canada, the UK, Australia, and New Zealand, you are more likely to see cubic meters, millimeters, kilograms, and metric bag sizes; the same brands sell 25 kg and 30 kg bags in Canada, with yields published in cubic meters.<\/p>\n\n\n\n
For conversions, one cubic yard is approximately 0.7646 cubic meters. UK ready-mix is quoted per cubic metre, and suppliers there apply their own minimum-load and partial-load policies.<\/p>\n\n\n\n
The method does not change. Work out the finished volume you need, divide by the manufacturer’s stated bag yield in the same unit system, add a reasonable allowance, and round up to whole bags.<\/p>\n\n\n\n
Frequently Asked Questions<\/h2>\n\n\n\nHow many 60-lb bags of concrete make one cubic yard?<\/h2>\n\n\n\n About 60 bags, from 27 \u00f7 0.45, when the product lists a yield of 0.45 cubic feet per 60-lb bag. Confirm the yield on your own bag first.<\/p>\n\n\n\n
How many 80-lb bags of concrete make one cubic yard?<\/h2>\n\n\n\n About 45 bags, from 27 \u00f7 0.60, based on a listed yield of 0.60 cubic feet per 80-lb bag. High-yield specialty mixes can need far fewer.<\/p>\n\n\n\n
How many 40-lb bags of concrete make one cubic yard?<\/h2>\n\n\n\n About 90 bags, from 27 \u00f7 0.30, using a listed yield of 0.30 cubic feet per 40-lb bag.<\/p>\n\n\n\n
How much concrete does a 60-lb bag make?<\/h2>\n\n\n\n Standard 60-lb concrete mixes commonly list roughly 0.45 cubic feet of mixed concrete per bag. That equals about 0.017 cubic yards.<\/p>\n\n\n\n
How much does an 80-lb bag of concrete cover?<\/h2>\n\n\n\n At a 0.60 cubic foot yield, one 80-lb bag covers about 1.8 square feet at 4 inches thick, or roughly 3.6 square feet at 2 inches thick. Coverage falls as thickness increases.<\/p>\n\n\n\n
How many bags of concrete do I need for a 10\u00d710 slab?<\/h2>\n\n\n\n A 10 ft \u00d7 10 ft slab at 4 inches is 33.33 cubic feet, or 1.23 cubic yards. That is about 56 80-lb bags at a 0.60 cubic foot yield, or 62 bags with a 10% allowance.<\/p>\n\n\n\n
Should I buy extra bags of concrete?<\/h2>\n\n\n\n Yes, a 5% to 10% allowance is sensible for most DIY jobs. Use closer to 5% for a simple, carefully formed slab on a compacted base, and 10% for first-time work, uneven excavation, irregular holes, or when you are unsure of your measurements. An allowance is a cushion, not a replacement for accurate measuring and good site prep.<\/p>\n\n\n\n
Is it cheaper to buy bags of concrete or order ready-mix?<\/h2>\n\n\n\n It depends on your local bag price, the ready-mix price per yard, delivery and short-load fees, site access, project volume, and how many people you have to mix and place. There is no fixed volume at which one is always cheaper, so get a local quote and compare it against your bag count.<\/p>\n\n\n\n
How many bags of concrete come on a pallet?<\/h2>\n\n\n\n Pallet quantities vary by product, bag size, manufacturer, and retailer. One manufacturer lists 56 bags per pallet for a 60-lb mix and 42 per pallet for an 80-lb mix of the same product line, while a fast-setting 50-lb product is listed at 56 per pallet. Check the product page or ask your supplier for the pallet count you will actually receive.<\/p>\n\n\n\n
How much water do I add to a 60-lb bag of concrete?<\/h2>\n\n\n\n Follow the label, because water requirements differ by product. One standard mix lists a starting water content of 4 pints for a 60-lb bag with a maximum of about 7 pints, while another 60-lb product calls for roughly 2.5 to 3 quarts. Add water gradually to reach a workable, moldable consistency, and avoid overwatering, since excess water weakens the finished concrete.<\/p>\n\n\n\n
Can I use this calculator for footings or foundations?<\/h2>\n\n\n\n Use it to estimate material quantity only. Structural slabs, foundations, footings, retaining structures, and load-bearing work should follow local building codes and professional or engineering guidance, and manufacturers direct readers to local codes for load-bearing footing specifications.<\/p>\n\n\n\n
Final Takeaway<\/h2>\n\n\n\n Calculate your project volume in cubic feet, divide by the finished yield printed on the exact bag you are buying, then add 5% to 10% and round up to whole bags. That sequence is reliable at any project size, in any unit system, because it uses your real dimensions and your real product’s yield instead of a generic bag count.<\/p>\n","protected":false},"excerpt":{"rendered":"
R\u00e9ponse directe\u00a0: Combien de sacs contient un m\u00e8tre cube\u00a0? Un m\u00e8tre cube \u00e9quivaut \u00e0 27 pieds cubes. Le nombre de sacs n\u00e9cessaires d\u00e9pend donc de la quantit\u00e9 de b\u00e9ton fini que chaque sac permet de produire, appel\u00e9e rendement par les fabricants. En utilisant les rendements indiqu\u00e9s sur les emballages de m\u00e9langes de b\u00e9ton standard les plus courants, un m\u00e8tre cube n\u00e9cessite environ\u00a0:<\/p>","protected":false},"author":1,"featured_media":449,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"unboxed","_kad_post_vertical_padding":"hide","_kad_post_feature":"hide","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-448","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-construction-and-civil"],"taxonomy_info":{"category":[{"value":8,"label":"Construction And Civil"}]},"featured_image_src_large":["https:\/\/hippotool.com\/wp-content\/uploads\/2026\/09\/Essential-Concrete-Bags-per-Yard-40-60-80-1024x559.webp",1024,559,true],"author_info":{"display_name":"A.Malik","author_link":"https:\/\/hippotool.com\/fr\/author\/abdullah410malikgmail-com\/"},"comment_info":0,"category_info":[{"term_id":8,"name":"Construction And Civil","slug":"construction-and-civil","term_group":0,"term_taxonomy_id":8,"taxonomy":"category","description":"","parent":0,"count":4,"filter":"raw","cat_ID":8,"category_count":4,"category_description":"","cat_name":"Construction And Civil","category_nicename":"construction-and-civil","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/posts\/448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/comments?post=448"}],"version-history":[{"count":1,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/posts\/448\/revisions"}],"predecessor-version":[{"id":450,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/posts\/448\/revisions\/450"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/media\/449"}],"wp:attachment":[{"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/media?parent=448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/categories?post=448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hippotool.com\/fr\/wp-json\/wp\/v2\/tags?post=448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}