Concrete Wall Volume Calculator
This calculator estimates the concrete volume and mass for poured or formed walls using simple dimensional inputs: length (ft), height (ft) and thickness (in). It returns volume in cubic feet, cubic yards, and cubic meters, plus bag-count estimates and approximate weight.
Results use commonly accepted material densities and practical bag yields. They are intended for planning and ordering — allow extra for waste, over-excavation, formwork tolerances, and field adjustments.
Governance
Record fec8fd67ca31 • Reviewed by Fidamen Standards Committee
Inputs
Results
Volume (cubic feet)
53.3333
Volume (cubic yards)
1.9753
Volume (cubic meters)
1.5102
Estimated 60 lb bags
119
Estimated 80 lb bags
89
Estimated concrete weight (lb)
8,000
Estimated concrete weight (kg)
3,628.739
| Output | Value | Unit |
|---|---|---|
| Volume (cubic feet) | 53.3333 | ft³ |
| Volume (cubic yards) | 1.9753 | yd³ |
| Volume (cubic meters) | 1.5102 | m³ |
| Estimated 60 lb bags | 119 | — |
| Estimated 80 lb bags | 89 | — |
| Estimated concrete weight (lb) | 8,000 | lb |
| Estimated concrete weight (kg) | 3,628.739 | kg |
Visualization
Methodology
Volume is computed from the rectangular prism formula: length × height × thickness, with thickness converted from inches to feet. Cubic feet are converted to cubic yards (1 yd³ = 27 ft³) and cubic meters (1 ft³ = 0.0283168466 m³).
Weight uses a typical concrete density of 150 lb/ft³ (≈2400 kg/m³). Bag estimates use common bag yields: ≈0.45 ft³ per 60 lb bag and ≈0.6 ft³ per 80 lb bag. Manufacturer specifications may vary; always confirm with the product datasheet.
Worked examples
Example: 10 ft length × 8 ft height × 8 in thickness → cubic feet = 10 × 8 × (8/12) = 53.333 ft³ → ≈1.976 yd³.
Bag estimate for same wall: 53.333 ft³ ÷ 0.45 ≈ 119 of 60 lb bags (round up and add contingency).
F.A.Q.
Should I order exactly the calculator result?
No. Always add contingency for waste and field conditions. For simple pours add at least 5–10% extra; for complex forms, deep footings, or where rework is likely, consider 10–15% or consult your supplier.
What units do I enter?
Enter length and height in feet (decimal) and thickness in inches. This keeps inputs simple for common U.S. construction practice. For metric workflows, convert inputs to meters and use a dedicated metric calculator or convert the final results using the cited unit conversions.
How accurate are bag estimates and weight?
Bag yields and densities vary by mix design and moisture. The calculator uses typical values (0.45 ft³ per 60 lb bag, 0.6 ft³ per 80 lb bag, 150 lb/ft³). For procurement, confirm yields and density with the bag or ready-mix supplier.
How should I measure the wall dimensions in the field?
Measure multiple points along the wall and use the average for length and height. For variable thickness, break the wall into segments and calculate each segment separately, then sum volumes. Use calibrated tape measures or laser distance meters and follow manufacturer calibration guidance.
Are there regulatory or safety considerations I should know?
This tool provides quantity estimates only. Structural design, reinforcement, curing, and formwork must comply with local building codes and standards (for example, relevant American Concrete Institute guidance and state/local building codes). Engage a licensed engineer for structural design and code compliance.
Why does the calculator use 150 lb/ft³ for density?
150 lb/ft³ (≈2400 kg/m³) is a widely used nominal density for normal-weight concrete. Specialty mixes (lightweight or heavyweight) use different densities; check mix design documents or supplier data for precise mass estimates.
Sources & citations
- National Institute of Standards and Technology (NIST) — https://www.nist.gov
- American Concrete Institute (ACI) — standards and practice — https://www.concrete.org
- Federal Highway Administration (FHWA) — concrete pavements and specifications — https://www.fhwa.dot.gov
- Penn State Extension — concrete basics and unit conversions — https://extension.psu.edu
- ACI — American Concrete Institute Standards — https://www.concrete.org/publications/typesofpublications/standards(codesandspecs).aspx
- ASTM International — Construction Standards — https://www.astm.org/
Further resources
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: fec8fd67ca31What changed (latest)
v1.0.0 • 2025-11-01 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-01 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 1, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-01 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: aa22e9cf04d7