Retaining WallCalcContact
PROJECT MATERIAL PLANNING

Retaining wall cost calculator

Build a retaining wall budget with editable block, gravel, cap, pipe, delivery and labor prices. See line items and cost per exposed square foot.

US & metric units
No account needed
Your wall
ft

Measure along the wall alignment.

ft

Block face only; exclude the cap.

rows

Use the embedment from your plans.

in
in
in

Presets are generic examples. Check actual product coverage and packaging.

Cutting & breakage allowance
%
Schematic wall section showing caps, wall units, base aggregate and the drainage zone. Not to scale.3 ftCapDrainage stoneBase aggregate1 buried courseSECTION VIEW · NOT TO SCALEWall run: 30 ft
Dimensions and material zones follow your inputs. Confirm the construction detail with your wall supplier.
Updates as you type
YOUR MATERIAL ESTIMATEPlanning quantity
$2,718USD example budget

Based on your entered prices, delivery, labor and modeled tax.

26Cap stones
4.79Stone · yd³
3Whole pallets*
MaterialQuantity
Wall units138 exposed + 23 buried + 17 allowance178 blocks
Cap stones23 net + 3 allowance26 caps
Leveling base aggregateVolume plus your stone allowance1.12 yd³
Drainage & core-fill stoneRectangular backfill zone plus selected core fill3.67 yd³
Drain pipe1 roll(s) at entered roll length34 ft
Geotextile sheet allowanceOne rear face and bottom strip, plus overlap155.25 ft²
Cap adhesiveCoverage and bead count you specified3 tubes
Materials at entered prices$1,023

USD · Individual units and volumes; delivery, labor and tax are extra.

*Pallet packaging is editable. Costs use individual quantities. Material estimate only; verify products and site-specific design.

THE COMPLETE TAKEOFF

Quantities, prices & assumptions

30 ft wall run · 90 ft² exposed face
MaterialOrder quantityEntered unit priceLine total
Wall units138 exposed + 23 buried + 17 allowance178 blocks$2.75 / blocks$490
Cap stones23 net + 3 allowance26 caps$4.50 / caps$117
Leveling base aggregateVolume plus your stone allowance1.12 yd³$60.00 / yd³$67
Drainage & core-fill stoneRectangular backfill zone plus selected core fill3.67 yd³$70.00 / yd³$257
Drain pipe1 roll(s) at 50 ft; fittings excluded34 ft$1.25 / ft$43
Geotextile sheet allowanceOne rear face and bottom strip, plus overlap155.25 ft²$0.18 / ft²$28
Cap adhesiveCoverage and bead count you specified3 tubes$7.50 / tubes$23
DeliveryEntered allowance—$75
Labor90 ft² exposed face$18.00 / ft²$1,620
Modeled tax0% on materials + delivery—$0
Total example budgetReplace example prices with your quotes$2,718 USD
1 buried course10% unit allowance10% stone allowance6.7 US tons stone at entered density

Unit dimensions: 16 × 6 × 10 in. 1 buried courses. Cutting allowance 10%. Stone allowance 10%. Supplier density 1.4 US tons/yd³.

Material estimate only. Package rounding, design, permits, equipment, excavation and fittings are separate. Verify all inputs against actual products and approved plans.

retainingwallcalc.org · 2026

Build a quote-based budget

The calculator multiplies the material takeoff by prices you enter. Its starting USD values are example inputs, not current retail prices, a national cost average or an installation quote. A project with limited site access can cost much more than an accessible wall with the same dimensions.

Get written local prices for the exact face units and caps, not a generic block category. Ask how the quarry measures aggregate, whether minimum loads apply, and whether delivery, fuel or unloading charges are included.

Materials = Σ(quantity × entered unit price)
Budget = materials + delivery + labor + modeled tax

Understand the labor and tax model

Labor is an entered rate multiplied by exposed wall face area. Buried courses increase material quantities but are not added to the exposed area in this labor model. A contractor may price excavation, base preparation, drainage, cuts and site access separately.

The tax field applies to materials and delivery only. It does not determine a jurisdiction’s tax obligations or whether labor is taxable. Enter a budgeting assumption and replace the output with the actual quote or invoice when available.

Check costs outside the material list

Plan separately for surveying, design, permits, excavation, haul-off, equipment rental, fittings, temporary access, restoration and contingency. The calculator does not hide these inside an unexplained regional multiplier.

The currency selector changes the label. It does not use an exchange-rate feed. If you change from USD to GBP, AUD, CAD, EUR or PKR, enter prices in that currency. Switching measurement units converts volume and area price bases so the same entered budget remains consistent.

Compare DIY and installed options

Set labor to zero to review the modeled material-and-delivery budget. Enter your installer’s rate to create a separate comparison. The difference does not measure the true saving from DIY: equipment, your time, contractor warranties and the consequences of construction defects can change the comparison.

A complete takeoff helps you ask consistent questions of multiple suppliers. Print the project dimensions and assumptions alongside the quantities so every quote is based on the same starting information.

References and scope

Arithmetic and worked examples are explained on our methodology page. These manufacturer references provide product-specific context, not approval of a generic wall. Accessed October 1, 2026.

Read the estimating and engineering limits, or send a correction.

KEEP PLANNING

Related tools & guides

01

block calculator

Calculate whole retaining wall blocks by course, including buried rows, cutting waste and pallet counts. Enter your actual block dimensions.

02

How to calculate materials

A practical walkthrough of full-course block counts, buried rows, base gravel, drainage backfill, caps and supplier-ready quantities.

03

calculator

Estimate retaining wall blocks, gravel, caps, pipe and project costs. Includes buried courses, waste allowance, metric units and a printable material list.