Landscaping & Garden Calculators

Find how many bags or how much bulk mulch a bed needs, from your bed size, desired depth, and mulch type — supports both US bag sizes (cu ft) and UK/AU bag sizes (litres)

Find how many bags or how much bulk topsoil an area needs to fill or top-dress, from your area size, desired depth, and topsoil type — supports both US bag sizes (cu ft) and UK/AU bag sizes (litres)

Find how much of each ingredient a raised bed soil-mix recipe needs — Mel's Mix, a topsoil-compost blend, or your own custom ratio — from your bed size and fill depth, with each component's own volume, bag count, and cost

Find how many rolls, pallets, or slabs of sod your lawn needs, from your lawn area and chosen sod source — supports both US rolls/pallets (sq ft) and UK/AU metric slabs/turf rolls (m²)

Find how much grass seed your lawn needs — for a new lawn or for overseeding an existing one — from your lawn area and chosen species (cool-season, warm-season, or a generic blend), with results in lb and kg

Find how much lawn fertilizer you need — for spring green-up, summer maintenance, fall/winterizing, or a new lawn starter feeding — from your lawn area, chosen scenario, and fertilizer product's N-P-K ratio, with results in lb and kg

Find how many plants your garden bed needs — by plant type (vegetables, fruit, shrubs, flowers) or a custom spacing distance, in a Square/Grid or Triangular/Staggered layout — with results in in and cm

Find how much brown (carbon) and green (nitrogen) material your compost pile or bin needs to hit a target C:N ratio — mixed by weight, not just volume — with brown/green volume, weight, and an estimated finished-compost yield range

Find the base or slab, bedding sand or mortar bed, paver or flagstone quantity, and joint fill materials your patio needs — choose Sand-Set (flexible/interlocking) or Mortar-Set (rigid, on a slab), and Concrete Pavers or Natural Flagstone, at pedestrian-load ICPI/CMHA depths

Find your pond's water volume (gallons/litres), liner size, recommended pump GPH, and a fish-stocking guideline — for Rectangular, Circular, Oval, or Irregular/Kidney-shaped ponds, with an optional marginal shelf zone and waterfall add-on

Find how many sprinkler heads (or drip plants) fit on one zone from your measured flow, how many minutes each zone should run from its precipitation rate and your weekly water target, and whether your soil and slope need the run split into cycles with soak periods between them

Find the true volume of your pots, planters, window boxes, hanging baskets and grow bags from their inside dimensions, how much potting mix they need once you leave headspace below the rim, and how many bags that comes to — in dry quarts as US bag labels use, litres, and cubic feet

Plan artificial grass as real strips cut off a fixed-width roll with the pile direction locked — comparing both running directions — then size the base aggregate, weed barrier, infill, seam tape, adhesive, fasteners and edging the installation needs

Size the drainage stone, perforated pipe, geotextile and fittings a French drain needs from the real trench — which deepens toward the outlet as the fall is dug into it — and check whether the pipe can carry the water actually arriving

Find how much lime (to raise pH) or sulfur (to lower it) your lawn needs, from a quick soil-texture estimate or an accurate buffer-pH soil test reading, with a safe application schedule sized to the real ceilings that govern how fast a correction can happen

Find how much drip tubing, how many emitters, and how many fittings a drip irrigation layout needs to buy and install — for garden rows or individual plants — rounded up to real retail roll sizes, with an optional cost estimate

Find how much landscape edging, how many stakes, and how many splice connectors a garden bed or border needs to buy and install — rectangular, circular, or a measured irregular perimeter — rounded up to real retail roll or section sizes, with an optional cost estimate

Find the correct planting hole diameter and depth, backfill soil volume, an optional mulch ring, and staking or guying materials — for one or several trees and shrubs of mixed sizes, with root ball size read from the ANSI Z60.2-2025 nursery standard