SolverOrg

Material takeoff

Plan retaining-wall materials with your block dimensions.

Enter a measured wall segment and the selected product’s face dimensions. See rows, blocks per row, allowance, caps, and optional base material separately—without structural or code claims.

Measurements

Wall worksheet

Product dimensions and any base-material dimensions are yours to supply. This worksheet does not prescribe a wall design.

Wall dimensions

Enter a manually measured wall segment; slopes, returns, curves, and site conditions are not inferred.

Selected block face

Use the visible coverage dimensions for the specific block product you selected; no universal block size is assumed.

Blocks and allowance

Additional base blocks are only a quantity you enter for your chosen detail; they are not a prescribed base course.

Cap units

Enter the coverage length for the selected cap product.

Optional base material
Optional unit costs (USD)

Cost uses purchasing quantities for blocks and caps; base material cost uses the calculated user-configured volume.

Starting estimate is ready.

Project takeoff

Engine result

Blocks to purchase

106 blocks

Allowance-adjusted and rounded up to whole blocks.

Based on a 24 ft long × 3 ft high wall and 18 in × 6 in block face.

Rows / blocks per row
6 rows · 16 blocks
Base block requirement
96 blocks
Extra material allowance
+9.6 blocks
Final calculated requirement
105.6 blocks
Blocks to purchase
106 blocks
Caps to purchase
18 caps

Show your work

  1. Divide measured wall length by the entered block face width and round up to cover the full row.

    ceil(7.315200000000001 m ÷ 0.4572 m) = 16 blocks per row= 16 blocks per row

  2. Divide measured wall height by the entered block face height and round up to cover the full height.

    ceil(0.9144000000000001 m ÷ 0.15239999999999998 m) = 6 rows= 6 rows

  3. Multiply the rounded row quantities, then add only the separately entered base-block quantity.

    16 blocks per row × 6 rows + 0 additional base blocks = 96 blocks= 96 blocks

  4. Apply the user-selected extra material allowance to the block requirement.

    96 blocks + 10% = 105.60000000000001 blocks= 105.6 blocks

  5. Round the allowance-adjusted block requirement upward to whole purchasable blocks.

    round up 105.60000000000001 blocks = 106 blocks= 106 blocks

  6. Use the user-entered cap coverage, then apply the same allowance and round upward to whole cap units.

    ceil(7.315200000000001 m ÷ 0.4572 m) = 16 caps; + 10% = 17.6; round up = 18= 18 caps

Assumptions & warnings

  • Block face: 18 in × 6 in
  • Extra material allowance: 10%
  • warning: Planning-only material takeoff. It does not assess wall stability, loading, reinforcement, drainage, setback, soil conditions, code compliance, or suitability for a retained height.
  • info: Block and cap coverage are product-specific inputs. Confirm selected product dimensions and coverage before ordering.
  • info: Purchasing quantities are rounded upward to whole units.
Technical details, sources & version
  • SI and customary length and volume unit definitionsexact definition

    The engine normalizes dimensions to metres and can display equivalent feet and cubic yards.

  • User-entered wall measurementsuser configurable assumption

    The calculator uses manually measured length and height; it does not infer wall geometry.

  • User-entered block face dimensionsuser configurable assumption

    Block dimensions are product-specific. Confirm the selected product face coverage before ordering.

  • Rows from wall height and block face heightmathematical relationship
  • Blocks per row from wall length and block face widthmathematical relationship
  • User-entered additional base-block quantityuser configurable assumption

    This optional quantity is not a prescribed base-course design.

  • User-configured extra material allowanceuser configurable assumption
  • Whole-unit purchasing round-upmathematical relationship

    Allowance-adjusted blocks and optional cap units are rounded upward to avoid under-ordering.

  • User-entered cap coverageuser configurable assumption

    Cap coverage is included only when a cap product and its coverage are entered.

  • User-entered base-material width and depthuser configurable assumption

    No universal base depth, drainage layer, setback, or reinforcement requirement is assumed.

  • User-entered retaining-wall material costsuser configurable assumption

    No live supplier pricing is used.

Normalized wall length: 7.32 m

Normalized wall height: 0.91 m

retaining-wall-material · v1.0.0 · released 2026-08-13

Owner: SolverOrg maintainers · Reviewed 2026-08-13

Method

The engine divides measured wall length and height by the user-entered block face dimensions, rounds rows and blocks upward, applies the selected allowance, and rounds whole purchasing units upward. Caps and base material are included only when their product coverage or dimensions are entered.

Worked example

The starting worksheet divides a 24 ft wall by an 18 in block face to get 16 blocks per row. Dividing the 3 ft wall height by the 6 in face height gives 6 rows, then the selected allowance is shown before the whole-block purchase quantity.

Planning-only takeoff

Planning-only material takeoff: this calculator estimates material quantities from your measurements and selected product dimensions. It does not evaluate structural stability, loading, soil, reinforcement, drainage, wall setback, code compliance, or suitability for any retained height.

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