Landscape area and material calculators.
Plan the whole project.
Field-ready calculators for turning site dimensions into clear material estimates—without accounts, uploads, or guesswork hidden from view.
Start with an area plan18 × 12LAWN B
Ø 14N
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Build an area plan from simple shapes
Most outdoor spaces can be estimated by splitting them into rectangles, triangles, and circular sections. Add each measurement to get one working total.
Build an area plan
- No sections yet. Add your first measured shape.
From field notes to an order list
Choose the material or site condition you need to estimate. Every calculator exposes its assumptions and produces a result you can print.
Area calculator
Combine rectangles, circles, and triangles to estimate the total area of an irregular lawn, bed, or landscape project.
Mulch
Estimate bulk cubic yards and bags of mulch from bed area, installation depth, bag size, and waste allowance.
Topsoil & compost
Estimate cubic yards and bags of topsoil or compost for a measured area and finished depth.
Gravel
Estimate gravel volume and weight from area, compacted depth, material density, and an ordering allowance.
Sod
Calculate sod pieces, rolls, or pallets from lawn area, unit coverage, pallet size, and waste allowance.
Grass seed
Estimate grass seed weight and whole bags using area, label application rate, bag weight, and allowance.
Pavers
Estimate individual pavers and paved square footage from project area, paver dimensions, joint width, and waste.
Plant spacing
Estimate plants for a rectangular bed using on-center spacing and either square or triangular layout.
Slope & grade
Convert measured rise and horizontal run into percent grade, slope ratio, angle, and fall per 100 feet.
Retaining wall
Estimate wall blocks, courses, cap units, and face area from wall dimensions, block size, and waste.
GUIDES & RESOURCES
Methods behind the numbers
Field-oriented references for measuring, choosing assumptions, and checking an estimate before material is ordered.
Area × finished depth gives mulch volume; the site plan and material guidance determine the depth and purchasing allowance.
02SITE MEASUREMENTMeasuring an Irregular Landscape AreaSketch first, decompose the boundary into non-overlapping shapes, and preserve every dimension so the total can be checked in the field.
03ZONE WORKSHEETPlan Multiple Landscape BedsGive every bed its own sketch, area, target depth, material, and allowance; only combine quantities that truly share a product and installation condition.
04MATERIAL VOLUMEConvert Area and Depth to Bulk and Bag QuantitiesConvert depth to feet, calculate volume before allowance, and round only at the supplier’s actual bulk or bag unit.
Clear math.
Practical caveats.
Your inputs stay local
Measurements and results are calculated in your browser. This site has no accounts or project database.
Assumptions stay visible
Product sizes, density, waste, and layout rules remain editable or clearly stated.
Results are planning aids
Use supplier data and independent checks before purchasing, excavation, grading, or structural work.