GRLab

Retaining wall calculators & material estimators

Plan the whole wall — blocks, base, drainage, geogrid and cost — with tools that show their work. Plus material estimators for paint, tile, flooring and concrete. No sign-up, no math.

Retaining wall calculators

Every stage of the build — takeoff, cost, reinforcement, drainage, excavation, curves and terracing — for SRW block, timber, gabion, poured concrete and natural stone walls. A wall over 4 ft (1.2 m) of exposed height, or one holding a slope or driveway above it, needs a licensed engineer; each tool says so.

Retaining wall calculatorSRW blocks, caps, base, drainage, geogrid & cost — full takeoff Retaining wall cost calculatorInstalled vs DIY price by material, region & site factors Retaining wall block comparisonBlocks needed & cost per sq ft across brands — pick the cheapest Retaining wall geogrid calculatorReinforcement layers, spacing, length & rolls — for budgeting and your engineer Retaining wall drainage calculatorDrainage gravel, core fill, pipe & fabric — with bulk-vs-bagged cost Retaining wall excavation calculatorBase-trench dig volume, soil swell, spoil weight & haul-off vs dumpster cost Timber retaining wall calculatorWood-wall timbers by course, deadman tie-backs, spikes, gravel & material cost Gabion wall calculatorBaskets by course, fill stone tons with voids, wire, fabric & base-thickness check Poured concrete retaining wall calculatorFooting sizing, concrete yards with short-load fees, rebar schedule, forms & drainage Natural stone & boulder retaining wall calculatorTons of wall stone by volume & pack density, gravity base-width check, pad, drainage & delivery Curved retaining wall calculatorBase-course layout radius, minimum-radius check for inside & outside curves, blocks per course & caps Terraced retaining wall calculatorBench width from the 2H rule, hillside depth needed, and block & cost against one tall wall

Other project calculators

Interior and general material estimators.

Paint calculatorHow much paint for a room, with coats, doors & windows Flooring calculatorSquare footage with waste, boxes to buy & cost Tile calculatorTiles by size, grout gap & waste — plus boxes Concrete calculatorCubic yards or m³ for slabs, footings & columns — in bags Drywall calculatorSheets plus joint compound, tape & screws Wallpaper calculatorRolls by wall size & pattern repeat, the pro strip method Baseboard & trim calculatorLinear feet of molding, doorways & waste, in whole pieces

Built for the parts other wall calculators skip

Most retaining wall calculators stop at block count. A real build also needs base gravel, drainage stone and pipe, filter fabric, geogrid layers at the right spacing, cap adhesive and an excavation sized to fit all of it — and every one of those numbers moves with the block you actually buy. The wall takeoff produces that full bill of materials in one pass, and dedicated tools go deeper on geogrid layers, drainage, excavation, installed vs DIY cost, curved walls and terraced walls, where the spacing between tiers decides whether they count as two short walls or one tall one. Not building in block? There are separate takeoffs for timber, gabion, poured concrete and natural stone walls.

Estimate materials without the guesswork

Buying too little means a second trip mid-project; buying too much wastes money. GRLab gives you a clear, itemized estimate for common home-improvement jobs, using the same coverage and waste assumptions the trades rely on — and it shows its work so you can adjust every number to your real conditions.

Every calculator runs instantly in your browser and works in both imperial and metric units. Estimates are for planning only — a retaining wall over 4 ft (1.2 m) of exposed height, or one supporting a slope, driveway or structure above it, should be designed by a licensed engineer.