---
title: "Concrete Block Calculator | Masonry Material Calculator | XTRAW Tools"
description: "Calculate number of concrete masonry units (CMU) needed for a wall. Use this free browser-based calculator from XTRAW Tools for mortar, block, cinder block, brick, and masonry wall estimates."
url: "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator"
date: "2026-05-21T23:56:43+00:00"
language: "en-GB"
---

[Wind Chill Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/wind-chill-calculator)[Air Changes Per Hour Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/air-changes-per-hour-calculator)

 [![Concrete Block Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/xtraw-concrete-block-calculator-360x360.jpg)](https://xtraw.com/images/virtuemart/product/xtraw-concrete-block-calculator-360x360.jpg "Concrete Block Calculator from XTRAW Tools")

  new

 [Back to: Home & Household Tools](https://xtraw.com/tools/everyday-utilities/home-household-tools "Home & Household Tools")

# Concrete Block Calculator

 Calculate number of concrete masonry units (CMU) needed for a wall. Use this free browser-based concrete block calculator from XTRAW Tools.

 **Concrete Block Calculator** helps you calculate number of concrete masonry units (CMU) needed for a wall. Use this free browser-based calculator from XTRAW Tools to compare inputs, estimate results, and plan your next step.

## How to Use the Concrete Block Calculator

1. Enter the required calculator inputs shown in the form.
2. Review the area, volume, thickness, spacing, coverage, waste factor, bag, block, sheet, tape, or paint assumptions.
3. Run the calculator, then adjust one input at a time to compare scenarios or check your estimate.

## What This Calculator Helps With

Calculate number of concrete masonry units (CMU) needed for a wall. It is designed for contractors, homeowners, builders, remodelers, masons, drywall installers, painters, DIY users, and construction planners who want a fast browser-based estimate before relying on supplier charts, contractor estimates, engineering plans, or professional sources.

- Wall Length: 20 ft
- Wall Height: 8 ft
- Block Length (face): 16 in
- Block Height (face): 8 in
- Mortar Joint: 0.375 in
- Waste Factor: 5%

## Common Uses

People use this calculator when they need a quick way to estimate mortar, concrete blocks, cinder blocks, bricks, wall area, or masonry materials.

- **Material Estimating:** Estimate material quantities, waste factors, coverage, bags, blocks, sheets, gallons, linear feet, and project needs before ordering supplies.
- **Measurement:** Use dimensions, surface area, volume, spacing, thickness, wall height, coverage, or project measurements to calculate a practical result.
- **Budgeting:** Support rough cost planning by estimating quantities before comparing supplier prices or contractor quotes.
- **Project Planning:** Plan job scope, materials, order quantities, and construction assumptions before starting a project.

## Formula or Method

Blocks = Wall area / Block face area (incl. joint)

## Example

**Example inputs:** Wall Length: 20 ft; Wall Height: 8 ft; Block Length (face): 16 in; Block Height (face): 8 in; Mortar Joint: 0.375 in; Waste Factor: 5%

**Example result:** Using the default inputs, wall area is 160.00 ft² and estimated concrete blocks with waste are 177.

## Related Tools

- [Mortar Calculator](https://xtraw.com/tools/mortar-calculator)
- [Brick Wall Calculator](https://xtraw.com/tools/brick-wall-calculator)
- [Cinder Block Calculator](https://xtraw.com/tools/cinder-block-calculator)
- [Brick Calculator](https://xtraw.com/tools/brick-calculator)
- [Square Footage Calculator](https://xtraw.com/tools/square-footage-calculator)

## Concrete Block Calculator FAQ

### Is the Concrete Block Calculator free?

Yes. This calculator is free to use on XTRAW Tools.

### Do I need to create an account?

No. XTRAW tools are designed for browser-based use without requiring an account.

### Are the results exact?

Results may be estimates depending on the inputs, formula, rounding, project assumptions, waste factor, coverage rate, material density, supplier specifications, and purpose of the calculator. Always verify important results before relying on them.

**Disclaimer:** This calculator is provided for general informational, educational, and convenience purposes only. It is not construction, engineering, safety, building-code, structural, contractor, supplier, legal, financial, or professional advice. Always verify important results with a qualified professional, contractor, engineer, supplier, manufacturer documentation, local code authority, or authoritative source before making decisions.

**Related Products** ![Tooltip]()

[![Mortar Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-mortar-calculator-360x360_230x230.jpg) Mortar Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/mortar-calculator "Mortar Calculator")

Calculate mortar volume and bags needed for a masonry project. Use this free browser-based mortar calculator from XTRAW Tools.

Custom prototype for related products

[![Brick Wall Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-brick-wall-calculator-360x360_230x230.jpg) Brick Wall Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/brick-wall-calculator "Brick Wall Calculator")

Calculate number of bricks needed for a wall. Use this free browser-based brick wall calculator from XTRAW Tools.

Custom prototype for related products

[![Cinder Block Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-cinder-block-calculator-360x360_230x230.jpg) Cinder Block Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/cinder-block-calculator "Cinder Block Calculator")

Calculate cinder blocks needed for a wall (standard 8×8×16 in blocks). Use this free browser-based cinder block calculator from XTRAW Tools.

Custom prototype for related products

[![Brick Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-brick-calculator-360x360_230x230.jpg) Brick Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/brick-calculator "Brick Calculator")

Estimate bricks needed for a wall or masonry project. Use this free browser-based brick calculator from XTRAW Tools.

Custom prototype for related products

[![Square Footage Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-square-footage-calculator-360x360_230x230.jpg) Square Footage Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/square-footage-calculator "Square Footage Calculator")

Calculate square footage from length and width. Use this free browser-based square footage calculator from XTRAW Tools.

Custom prototype for related products

 **Related Categories** ![Tooltip]()[![Calculators category image](https://xtraw.com/images/virtuemart/category/2_calculators.jpg) Calculators](https://xtraw.com/tools/calculators "Calculators")

Custom prototype for related categories

[![Construction & Home Calculators category image](https://xtraw.com/images/virtuemart/category/19_construction_and_home_calculators.jpg) Construction & Home Calculators](https://xtraw.com/tools/calculators/construction-home-calculators "Construction & Home Calculators")

Custom prototype for related categories

[![Construction Calculators category image](https://xtraw.com/images/virtuemart/category/158_construction-calculators.jpg) Construction Calculators](https://xtraw.com/tools/calculators/construction-home-calculators/construction-calculators "Construction Calculators")

Custom prototype for related categories

[![Masonry Calculators category image](https://xtraw.com/images/virtuemart/category/184_masonry-calculators.jpg) Masonry Calculators](https://xtraw.com/tools/calculators/construction-home-calculators/construction-calculators/masonry-calculators "Masonry Calculators")

Custom prototype for related categories

[![Home & Household Tools category image](https://xtraw.com/images/virtuemart/category/165_home-household-tools.jpg) Home & Household Tools](https://xtraw.com/tools/everyday-utilities/home-household-tools "Home & Household Tools")

Custom prototype for related categories

## Schema

```json
{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "Organization",
      "@id": "https://xtraw.com#organization",
      "name": "XTRAW Tools",
      "alternateName": "XTRAW",
      "url": "https://xtraw.com",
      "logo": {
        "@type": "ImageObject",
        "@id": "https://xtraw.com#logo",
        "url": "https://xtraw.com/images/xtraw-logo.png#joomlaImage://local-images/xtraw-logo.png?width=1100&height=400",
        "contentUrl": "https://xtraw.com/images/xtraw-logo.png#joomlaImage://local-images/xtraw-logo.png?width=1100&height=400",
        "caption": "XTRAW Tools"
      },
      "image": {
        "@id": "https://xtraw.com#logo"
      },
      "email": "jason@vuumarketing.com",
      "description": "XTRAW Tools provides free browser-based calculators, converters, generators, developer tools, business tools, file tools, writing tools, and everyday utilities.",
      "knowsAbout": [
        "calculators",
        "online calculators",
        "unit converters",
        "file tools",
        "developer tools",
        "business calculators",
        "finance calculators",
        "math calculators",
        "education calculators",
        "health calculators",
        "construction calculators",
        "real estate calculators",
        "writing tools",
        "random generators",
        "everyday utilities"
      ],
      "contactPoint": {
        "@type": "ContactPoint",
        "contactType": "customer support",
        "email": "jason@vuumarketing.com",
        "url": "https://xtraw.com/contact"
      }
    },
    {
      "@type": "WebSite",
      "@id": "https://xtraw.com#website",
      "name": "XTRAW Tools",
      "alternateName": "XTRAW Tools",
      "url": "https://xtraw.com",
      "publisher": {
        "@id": "https://xtraw.com#organization"
      },
      "inLanguage": "en-gb",
      "about": {
        "@id": "https://xtraw.com#organization"
      }
    },
    {
      "@type": "ImageObject",
      "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#primaryimage",
      "url": "https://xtraw.com/https://xtraw.com/images/virtuemart/product/xtraw-concrete-block-calculator-360x360.jpg",
      "contentUrl": "https://xtraw.com/https://xtraw.com/images/virtuemart/product/xtraw-concrete-block-calculator-360x360.jpg",
      "caption": "Concrete Block Calculator",
      "representativeOfPage": true
    },
    {
      "@type": "WebPage",
      "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#webpage",
      "url": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator",
      "name": "Concrete Block Calculator | Masonry Material Calculator | XTRAW Tools",
      "headline": "Concrete Block Calculator",
      "description": "Calculate number of concrete masonry units (CMU) needed for a wall. Use this free browser-based calculator from XTRAW Tools for mortar, block, cinder block, brick, and masonry wall estimates.",
      "inLanguage": "en-gb",
      "isPartOf": {
        "@id": "https://xtraw.com#website"
      },
      "publisher": {
        "@id": "https://xtraw.com#organization"
      },
      "primaryImageOfPage": {
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#primaryimage"
      },
      "datePublished": "",
      "dateModified": "",
      "mainEntity": {
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#webapplication"
      },
      "about": {
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#webapplication"
      },
      "breadcrumb": {
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#breadcrumb"
      }
    },
    {
      "@type": "BreadcrumbList",
      "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#breadcrumb",
      "itemListElement": [
        {
          "@type": "ListItem",
          "position": 1,
          "name": "Home",
          "item": "https://xtraw.com/"
        },
        {
          "@type": "ListItem",
          "position": 2,
          "name": "All Tools",
          "item": "https://xtraw.com/tools"
        },
        {
          "@type": "ListItem",
          "position": 3,
          "name": "Concrete Block Calculator",
          "item": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator"
        }
      ]
    },
    {
      "@type": [
        "WebApplication",
        "SoftwareApplication"
      ],
      "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#webapplication",
      "name": "Concrete Block Calculator",
      "alternateName": "Concrete Block Calculator | Masonry Material Calculator | XTRAW Tools",
      "description": "Calculate number of concrete masonry units (CMU) needed for a wall. Use this free browser-based calculator from XTRAW Tools for mortar, block, cinder block, brick, and masonry wall estimates.",
      "url": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator",
      "mainEntityOfPage": {
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#webpage"
      },
      "image": "https://xtraw.com/https://xtraw.com/images/virtuemart/product/xtraw-concrete-block-calculator-360x360.jpg",
      "thumbnailUrl": "https://xtraw.com/https://xtraw.com/images/virtuemart/product/xtraw-concrete-block-calculator-360x360.jpg",
      "screenshot": {
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#primaryimage"
      },
      "identifier": {
        "@type": "PropertyValue",
        "propertyID": "VirtueMart SKU",
        "value": "CALC-CONCRETE-BLOCK"
      },
      "applicationCategory": "UtilitiesApplication",
      "applicationSubCategory": "",
      "genre": [
        "Calculator",
        "Converter",
        "Web Tool",
        "Browser-Based Utility"
      ],
      "keywords": "concrete block calculator, concrete block calculator, CMU calculator; concrete block wall; block count calculator, construction & home, XTRAW Tools, ",
      "operatingSystem": "Any operating system with a modern web browser",
      "browserRequirements": "Requires a modern web browser with JavaScript enabled.",
      "softwareRequirements": "No installation required. Browser-based tool.",
      "permissions": "No account required.",
      "softwareVersion": "XTRAW Tools Web",
      "datePublished": "",
      "dateModified": "",
      "isAccessibleForFree": true,
      "isFamilyFriendly": true,
      "creator": {
        "@id": "https://xtraw.com#organization"
      },
      "publisher": {
        "@id": "https://xtraw.com#organization"
      },
      "provider": {
        "@id": "https://xtraw.com#organization"
      },
      "brand": {
        "@id": "https://xtraw.com#organization"
      },
      "audience": {
        "@type": "Audience",
        "audienceType": "People looking for free browser-based calculators, converters, generators, and practical online tools."
      },
      "featureList": [
        "Free to use",
        "Browser based",
        "No signup required",
        "Instant results",
        "Mobile friendly",
        "Copyable results where supported",
        "",
        "",
        ""
      ],
      "offers": {
        "@type": "Offer",
        "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator#free-offer",
        "url": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator",
        "price": "0",
        "priceCurrency": "USD",
        "availability": "https://schema.org/InStock",
        "category": "Free browser-based tool",
        "seller": {
          "@id": "https://xtraw.com#organization"
        },
        "eligibleRegion": {
          "@type": "Place",
          "name": "Worldwide"
        }
      },
      "potentialAction": {
        "@type": "UseAction",
        "name": "Use Concrete Block Calculator",
        "target": {
          "@type": "EntryPoint",
          "urlTemplate": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator",
          "actionPlatform": [
            "https://schema.org/DesktopWebPlatform",
            "https://schema.org/MobileWebPlatform",
            "https://schema.org/TabletWebPlatform"
          ]
        }
      }
    }
  ]
}
```

```json
{
    "@context": "https://schema.org",
    "@type": "BreadcrumbList",
    "itemListElement": [
        {
            "@type": "ListItem",
            "position": 1,
            "name": "Home",
            "item": "https://xtraw.com"
        },
        {
            "@type": "ListItem",
            "position": 2,
            "name": "All Tools",
            "item": "https://xtraw.com/tools"
        },
        {
            "@type": "ListItem",
            "position": 3,
            "name": "Everyday Utilities",
            "item": "https://xtraw.com/tools/everyday-utilities"
        },
        {
            "@type": "ListItem",
            "position": 4,
            "name": "Everyday Utilities",
            "item": "https://xtraw.com/tools/everyday-utilities"
        },
        {
            "@type": "ListItem",
            "position": 5,
            "name": "Home & Household Tools",
            "item": "https://xtraw.com/tools/everyday-utilities/home-household-tools"
        },
        {
            "@type": "ListItem",
            "position": 6,
            "name": "Concrete Block Calculator",
            "item": "https://xtraw.com/tools/everyday-utilities/home-household-tools/concrete-block-calculator"
        }
    ]
}
```