Direct answers
Concrete answers for specific sizes and jobs
Each page gives a direct answer, volume math, 80-lb and 60-lb bag counts, ready-mix order size, cost snapshot, PSI notes, common mistakes, and source references in server-rendered HTML.
Slab answers
How much concrete for a 8x8 slab (4 inches thick)? Estimate a 8 ft by 8 ft by 4 inch slab for a compact shed pad, trash-can pad, or small grill station: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 8x8 slab (6 inches thick)? Estimate a 8 ft by 8 ft by 6 inch slab for a hot tub pad, equipment pad, or thicker shed base: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 8x10 slab (4 inches thick)? Estimate a 8 ft by 10 ft by 4 inch slab for a small shed slab, mower pad, or narrow backyard utility pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 10x10 slab (4 inches thick)? Estimate a 10 ft by 10 ft by 4 inch slab for a small shed foundation, backyard patio extension, or utility pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 10x10 slab (6 inches thick)? Estimate a 10 ft by 10 ft by 6 inch slab for a heavier shed pad, hot tub pad, or small garage apron: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 10x12 slab (4 inches thick)? Estimate a 10 ft by 12 ft by 4 inch slab for a common storage shed slab or narrow patio: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 10x12 slab (6 inches thick)? Estimate a 10 ft by 12 ft by 6 inch slab for a thicker shed base, small workshop pad, or equipment slab: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 12x12 slab (4 inches thick)? Estimate a 12 ft by 12 ft by 4 inch slab for a square patio, shed floor, or outdoor workspace: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 12x12 slab (6 inches thick)? Estimate a 12 ft by 12 ft by 6 inch slab for a reinforced equipment pad or heavier residential flatwork area: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 12x16 slab (4 inches thick)? Estimate a 12 ft by 16 ft by 4 inch slab for a dining patio, workshop pad, or large shed slab: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 12x16 slab (6 inches thick)? Estimate a 12 ft by 16 ft by 6 inch slab for a heavier workshop slab or small garage-style pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 14x14 slab (4 inches thick)? Estimate a 14 ft by 14 ft by 4 inch slab for a square backyard patio or medium shed base: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 16x16 slab (4 inches thick)? Estimate a 16 ft by 16 ft by 4 inch slab for a larger patio, pergola base, or workshop pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 16x20 slab (4 inches thick)? Estimate a 16 ft by 20 ft by 4 inch slab for a large patio, carport pad, or rectangular workshop slab: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 16x20 slab (6 inches thick)? Estimate a 16 ft by 20 ft by 6 inch slab for a heavy-use shop slab, carport pad, or driveway parking pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 20x20 slab (4 inches thick)? Estimate a 20 ft by 20 ft by 4 inch slab for a two-car parking pad, large patio, or small garage floor: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 20x20 slab (6 inches thick)? Estimate a 20 ft by 20 ft by 6 inch slab for a thicker two-car pad, garage slab, or heavy-use driveway area: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 20x24 slab (4 inches thick)? Estimate a 20 ft by 24 ft by 4 inch slab for a garage-size slab, work pad, or broad patio: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 20x24 slab (6 inches thick)? Estimate a 20 ft by 24 ft by 6 inch slab for a reinforced garage slab or heavy storage pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 24x24 slab (4 inches thick)? Estimate a 24 ft by 24 ft by 4 inch slab for a two-car garage floor, large shop pad, or basketball practice pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 24x24 slab (6 inches thick)? Estimate a 24 ft by 24 ft by 6 inch slab for a heavy garage slab, shop floor, or vehicle pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 30x40 slab (6 inches thick)? Estimate a 30 ft by 40 ft by 6 inch slab for a large shop slab, pole barn slab, or equipment building floor: cubic yards, bag counts, cost, PSI, and calculation steps.
Driveway answers
How much concrete for a 12 foot driveway? Estimate a 10 ft by 12 ft by 4 inch driveway for a short single-car driveway apron or parking extension: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 20 foot 2-car driveway? Estimate a 20 ft by 20 ft by 4 inch driveway for a basic two-car driveway pad: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 30 foot driveway? Estimate a 10 ft by 30 ft by 4 inch driveway for a narrow single-car driveway run: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 40 foot driveway? Estimate a 10 ft by 40 ft by 4 inch driveway for a longer single-car driveway lane: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 40 foot 2-car driveway? Estimate a 18 ft by 40 ft by 5 inch driveway for a wide two-car driveway run with moderate vehicle loads: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 50 foot 2-car driveway? Estimate a 18 ft by 50 ft by 5 inch driveway for a long two-car driveway section: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 60 foot driveway? Estimate a 12 ft by 60 ft by 4 inch driveway for a long single-lane residential driveway: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 18x20 driveway (4 inches thick)? Estimate a 18 ft by 20 ft by 4 inch driveway for a compact two-car parking pad: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 20x20 driveway (6 inches thick)? Estimate a 20 ft by 20 ft by 6 inch driveway for a thicker two-car driveway pad: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost. How much concrete for a 24x24 driveway (6 inches thick)? Estimate a 24 ft by 24 ft by 6 inch driveway for a large two-car driveway or heavy parking pad: cubic yards, 80-lb bags, ready-mix order size, PSI, and cost.
Footing and foundation answers
How much concrete for 12 inch footings? Estimate concrete for eight 12 inch deck footings at 4 ft deep: cubic yards, bag counts, ready-mix order size, and calculation steps. How much concrete for 16 inch footings? Estimate concrete for eight 16 inch deck footings at 4 ft deep: cubic yards, bag counts, ready-mix order size, and calculation steps. How much concrete for 8 inch deck footings? Direct answer for eight 8 inch deck footings: cubic yards, bag counts, ready-mix order size, code cautions, and calculation steps. How much concrete for 8 inch footings? Estimate concrete for ten 8 inch fence post holes at 30 inches deep: cubic yards, bag counts, ready-mix order size, and calculation steps. How much concrete for 8 inch footings? Estimate concrete for twelve 4x4 fence posts in 8 inch holes: cubic yards, bag counts, ready-mix order size, and calculation steps. How much concrete for a 4x4 fence post? Direct answer for one 4x4 fence post hole: cubic feet, bag counts, depth assumptions, drainage gravel notes, and common mistakes. How much concrete for 12 inch footings? Estimate concrete for six 6x6 deck post piers in 12 inch holes: cubic yards, bag counts, ready-mix order size, and calculation steps. How much concrete for a 20 foot footing? Direct answer for a 20 ft continuous footing: cubic yards, bags, ready-mix order size, waste, and field checks. How much concrete for a 40 foot footing? Direct answer for a 40 ft continuous footing: cubic yards, bags, ready-mix order size, waste, and field checks. How much concrete for a 12x12 shed foundation? Estimate a 12 ft by 12 ft by 4 inch slab for a 12 by 12 shed foundation slab: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 20x30 foundation slab? Estimate a 20 ft by 30 ft by 6 inch slab for a 20 by 30 foundation slab: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 24x24 garage foundation? Estimate a 24 ft by 24 ft by 6 inch slab for a 24 by 24 garage foundation slab: cubic yards, bag counts, cost, PSI, and calculation steps.
Step answers
How much concrete for 3 step stairs? Direct answer for 3 concrete steps: cubic yards, 80-lb bags, waste, stair formula, PSI, and cost. How much concrete for 4 step stairs? Direct answer for 4 concrete steps: cubic yards, 80-lb bags, waste, stair formula, PSI, and cost. How much concrete for 5 step stairs? Direct answer for 5 concrete steps: cubic yards, 80-lb bags, waste, stair formula, PSI, and cost.
Patio, sidewalk, and misc answers
How much concrete for a 10 foot circular patio? Direct answer for a 10 ft round patio slab: cubic yards, 80-lb bags, ready-mix order size, and calculation steps. How much concrete for a 12 foot circular patio? Direct answer for a 12 ft round patio slab: cubic yards, 80-lb bags, ready-mix order size, and calculation steps. How much concrete for an 8x8 hot tub pad? Estimate a 8 ft by 8 ft by 6 inch slab for an 8 by 8 hot tub pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a hot tub pad? Direct answer for a standard 8x8 hot tub concrete pad: cubic yards, bag counts, ready-mix order, PSI, reinforcement, and base notes. How much concrete for a 20x20 garage floor? Estimate a 20 ft by 20 ft by 5 inch slab for a 20 by 20 garage floor slab: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for an 8x10 shed pad? Estimate a 8 ft by 10 ft by 4 inch slab for an 8 by 10 shed pad: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 10x12 shed base? Direct answer for a 10x12 shed base slab: cubic yards, 80-lb bags, ready-mix order, anchors, drainage, and calculation steps. How much concrete for a 4x50 sidewalk? Estimate a 50 ft by 4 ft by 4 inch slab for a 4 ft wide by 50 ft long sidewalk: cubic yards, bag counts, cost, PSI, and calculation steps. How much concrete for a 3-foot-wide sidewalk? Direct answer for a 3 ft wide sidewalk per 10 linear feet: cubic yards, bag counts, ready-mix order, PSI, joints, and scaling notes. How much concrete for a 3x30 walkway? Estimate a 30 ft by 3 ft by 4 inch slab for a 3 ft wide by 30 ft long walkway: cubic yards, bag counts, cost, PSI, and calculation steps.
Job-specific calculator pages
Shed base size calculator Shed base size calculator with concrete yards, 80-lb bags, ready-mix order size, gravel base notes, cost assumptions, and common shed slab sizes. Patio concrete calculator Patio concrete calculator for backyard slabs with cubic yards, bag counts, ready-mix order size, 2026 cost assumptions, thickness notes, and common patio sizes. Post hole concrete calculator Post hole concrete calculator for fence posts, deck posts, and round footings with bag counts, cubic yards, cost assumptions, and common post hole sizes. How many bags of concrete for a 10x10 slab? Direct bag-count calculator for a 10x10 concrete slab by thickness: 80-lb, 60-lb, and 50-lb bags, cubic yards, ready-mix comparison, and cost assumptions. Ready-mix vs bagged concrete calculator Ready-mix vs bagged concrete calculator with volume breakpoints, bag counts, cost comparison, delivery notes, short-load fees, and finish-risk guidance.
Other material direct answers
How much gravel for a 10x10 driveway? Direct answer for gravel for a 10x10 driveway area: cubic yards, tons, depth assumptions, waste, compaction notes, and ordering guidance. How much mulch for a 100 sq ft flower bed? Direct answer for mulch for a 100 sq ft flower bed: cubic yards, bags, 2-inch vs 3-inch depth, ordering notes, and common mistakes. How much paint for a 12x12 room? Direct answer for paint for a 12x12 room: wall area, gallons for two coats, ceiling option, coverage assumptions, and buying guidance. How much tile for a bathroom floor? Direct answer for tile for a typical bathroom floor: square footage, 10% waste, box count example, layout notes, and mistakes to avoid.