How to Calculate Concrete for Footings
A practical guide explaining strip footing, pad footing, and pier footing volume formulas with examples for common foundation jobs.
Read Article
Foundation Concrete Calculator 2026
Footing Calculator
Calculate concrete volume for strip footings, pad footings, pier footings, circular footings, and foundation bases. This footing calculator estimates cubic meters, cubic yards, concrete bags, ready-mix quantity, and waste allowance for residential, commercial, and small construction projects.
Use it before ordering concrete for wall foundations, column bases, deck piers, fence posts, porch footings, garage foundations, retaining walls, and structural pads. The tool is built for fast jobsite estimating with a mobile-friendly layout.
Works for strip, pad, pier, circular, trench, and custom footings.
Converts footing concrete into m³, yd³, ft³, bags, and truck loads.
Includes waste allowance, multiple footings, and metric/imperial inputs.
SEO optimized 2026 design with perfect mobile responsive layout.
Footing types covered
Select the footing shape that matches your foundation detail and enter the required dimensions.
- Strip footing for load-bearing walls and continuous foundations.
- Pad footing for columns, posts, bases, and isolated supports.
- Pier footing for round holes, deck posts, poles, and drilled shafts.
- Trench footing for foundation trenches and perimeter concrete.
- Multiple footing quantity with waste and ready-mix planning.
5
Footing Types
Strip, pad, pier, circular, trench, and custom foundation shapes.
m³
Volume Output
Get cubic meters, cubic yards, and cubic feet instantly.
Ready
Mix Planning
Estimate ready mix quantity, concrete bags, and truck loads.
100%
Mobile Friendly
Optimized form, buttons, tables, and results for mobile users.
Concrete Footing Volume Calculator
Choose a footing type, enter dimensions, add the number of footings, and include a waste allowance. The calculator estimates total footing concrete volume in cubic meters, cubic yards, cubic feet, and approximate bag quantities.
Selected Footing Type
-
Volume per Footing
0.000 m³
Base Volume Before Waste
0.000 m³
Waste / Over-Excavation Volume
0.000 m³
Total Concrete Volume
0.000 m³
Total Volume in Cubic Yards
0.000 yd³
Total Volume in Cubic Feet
0.000 ft³
Estimated Concrete Bags
0 bags
Estimated Ready-Mix Truck Loads
-
Ordering Note
-
Why Use a Concrete Footing Calculator?
Footing concrete is easy to underestimate because trenches, post holes, and pad foundations rarely match perfect drawings. A footing calculator helps you plan concrete volume before ordering ready mix or buying bags.
Strip Footing Concrete Calculator
Estimate continuous footing volume for block walls, brick walls, load-bearing foundations, retaining wall bases, garage foundations, and perimeter trenches.
Pad Footing Volume Calculator
Calculate concrete for isolated rectangular or square pads used below columns, posts, steel bases, porch supports, machine bases, and small foundation pads.
Pier Footing Calculator
Use circular footing mode for deck piers, fence posts, pergola supports, pole foundations, drilled holes, and round concrete bases.
Footing Concrete Estimator Benefits for 2026 Projects
A clear footing quantity estimate helps contractors, homeowners, and estimators reduce waste, avoid short orders, and plan site delivery more efficiently.
Better Ready-Mix Ordering
Convert footing dimensions into cubic meters and cubic yards so you can order ready-mix concrete with a practical waste allowance included.
Concrete Bag Estimate
For small footings, post holes, and DIY jobs, the calculator estimates the number of concrete bags needed based on your selected bag yield.
Mobile Jobsite Planning
The page uses responsive fields, clear result rows, and sticky buttons, making it easy to calculate footing concrete from your phone at the jobsite.
What Affects Footing Concrete Volume?
Footing concrete quantity depends on the footing shape, dimensions, number of footings, excavation accuracy, soil condition, and waste allowance. These factors can change the final order amount.
Footing Dimensions
Length, width, depth, and diameter directly control volume. Even small depth changes can noticeably increase concrete demand across long strip footings.
Soil and Excavation Shape
Loose soil, uneven trench walls, collapsed edges, and over-excavation can increase the actual concrete required compared with plan dimensions.
Number of Footings
Repeated pad footings, deck piers, and post holes should be multiplied by quantity to avoid underordering concrete for the full foundation layout.
Waste Allowance
A 5–15% allowance is commonly used for footing work because excavation tolerance, spillage, pump loss, and leveling can require extra concrete.
How to Calculate Concrete Volume for Footings
The basic footing formula is volume = length × width × depth for rectangular footings. For round piers, volume = π × radius² × depth. The calculator also multiplies by quantity and adds waste allowance.
1
Select Footing Type
Choose strip, pad, pier, circular, or custom volume so the calculator can use the correct footing volume formula.
2
Enter Dimensions
Measure length, width, depth, or diameter from your plan or site excavation. Use metric meters or imperial feet.
3
Add Quantity and Waste
Enter how many identical footings you need and add a waste percentage to cover excavation variation and ordering tolerance.
4
Review Concrete Quantity
Use the final m³, yd³, ft³, bag count, and truck load estimate for material planning, supplier quotes, or DIY purchasing.
Footing Concrete Volume Example Chart
Use these examples as quick planning references only. Actual footing dimensions should follow drawings, engineering requirements, local code, soil conditions, and site measurements.
| Footing Type | Example Size | Quantity | Base Volume | With 10% Waste | Typical Use |
|---|---|---|---|---|---|
| Strip Footing | 10 m × 0.60 m × 0.30 m | 1 | 1.800 m³ | 1.980 m³ | Wall foundation |
| Pad Footing | 1.20 m × 1.20 m × 0.40 m | 4 | 2.304 m³ | 2.534 m³ | Column bases |
| Round Pier | 0.45 m diameter × 1.20 m deep | 6 | 1.145 m³ | 1.260 m³ | Deck or pergola posts |
| Circular Pad | 1.00 m diameter × 0.30 m thick | 2 | 0.471 m³ | 0.518 m³ | Small round bases |
| Fence Post Footing | 0.30 m diameter × 0.75 m deep | 10 | 0.530 m³ | 0.583 m³ | Fence line posts |
Footing Concrete Formula and Ordering Tips
Use the formulas below to understand the calculator result and check your project quantity before ordering concrete bags or ready-mix delivery.
Strip and Pad Footing Formula
Rectangular footing volume = length × width × depth. Multiply by number of footings, then add waste percentage for ordering quantity.
Pier Footing Formula
Round pier volume = 3.1416 × radius² × depth. Radius is half the diameter, so always divide your hole diameter by two before calculating manually.
Ready-Mix Ordering Tip
For larger footings, order ready mix by cubic meters or cubic yards and confirm minimum load fees, truck access, placement time, and pump requirements.
Explore More Concrete Foundation Calculators
Use related tools to estimate concrete volume, reinforcement, aggregate, cement bags, mix grades, and foundation material quantities.
Concrete Volume Calculator
Calculate concrete quantity for slabs, beams, columns, walls, stairs, footings, and custom shapes.
Open CalculatorRebar Calculator
Estimate steel reinforcement bars, spacing, length, weight, laps, and waste for concrete foundations.
Open CalculatorCement Bags Calculator
Estimate cement bags required for concrete footings, slabs, mortar, plaster, and site batching.
Open CalculatorAggregate Calculator
Estimate gravel, crushed stone, sand, ballast, and aggregate quantity for concrete and base preparation.
Open CalculatorConcrete Cost Estimator
Estimate concrete project cost including ready mix, formwork, labor, transport, reinforcement, and waste.
Open CalculatorConcrete Weight Calculator
Convert footing concrete volume into weight in kilograms, pounds, metric tons, and short tons.
Open CalculatorFooting Design and Concrete Foundation Guides
Learn how footing dimensions, soil condition, reinforcement, frost depth, and concrete placement affect strong and durable foundations.
Soil Bearing and Footing Size Basics
Understand why soil strength, load type, drainage, and settlement risk influence footing width, depth, and reinforcement requirements.
Read ArticleFooting Depth, Frost Line and Local Codes
Learn why footings may need to extend below frost depth and why local building codes should always be checked before excavation.
Read ArticleFooting Calculator FAQs
These answers cover common questions about calculating concrete for strip footings, pad footings, pier footings, and foundation bases.
Multiply footing length by width by depth. For example, a 10 m long strip footing that is 0.6 m wide and 0.3 m deep has a volume of 1.8 m³ before waste allowance.
Many small projects use 5–15% extra concrete for footings because trenches and post holes are often uneven. Use a higher allowance when excavation is rough or soil collapses into the trench.
Yes. Choose round pier footing, enter the hole diameter and depth, then enter the number of piers. The calculator will estimate total concrete volume and approximate bag count.
No. It estimates concrete volume from dimensions you enter. Structural footing size should be determined from loads, soil bearing capacity, local code, frost depth, and engineering requirements.
Concrete bags can work for small post holes and minor pads. Ready mix is usually better for larger strip footings, multiple pads, or any pour where consistent quality and placement speed matter.
Calculate Footing Concrete Before You Order
Use this footing calculator to estimate concrete volume for strip footings, pad footings, pier footings, and circular foundation bases. It gives cubic meters, cubic yards, cubic feet, bags, waste allowance, and truck load planning in one mobile-friendly tool.