All garden & landscaping calculators
Every calculator on the site, grouped by job: mulch and soil, gravel and stone, lawns, planting, patios and walls, edging and posts, and water. Each one works in US or metric units and shows the working behind its answer.
Mulch, soil & compost
- Mulch CalculatorBags or cubic yards for beds, tree rings and corner beds, and whether bulk or bags is cheaper once delivery is counted.
- Topsoil CalculatorCubic yards and approximate tons of topsoil for new lawns, beds and leveling, with an allowance for settling.
- Raised Bed Soil CalculatorSoil for one or more rectangular or round raised beds — bags to buy, cubic feet, cost and a DIY mix breakdown.
- Compost CalculatorCompost for topdressing a lawn, amending new beds or mulching — yards, cu ft and bags.
- Bags to Cubic Yards CalculatorConvert bags of mulch, soil or stone to cubic yards — or yards to bags.
- Excavation CalculatorHow much dirt comes out of a hole — loose cubic yards after it swells, rough tons, and how many dumpster, truck or pickup loads to haul it away.
- Cubic Yard CalculatorCubic yards (and tons) of dirt, fill, mulch or stone for any area and depth — with a truckload check and a rounded bulk order.
- Pine Straw CalculatorHow many bales of pine straw for your beds: new beds or a yearly refresh, standard or big bales, or your supplier’s own coverage.
Gravel, stone & sand
- Gravel CalculatorTons of gravel or crushed stone for paths, pads and patios, with compaction, bags and what to ask the yard for.
- Driveway Gravel CalculatorTons of base, middle and top-layer stone for a new or resurfaced gravel driveway, with compaction per layer and truckloads.
- Pea Gravel CalculatorPea gravel for patios, paths and play areas — cubic yards, tons and bags.
- River Rock CalculatorTons of river rock or decorative stone for beds, borders and dry creek beds.
- Sand CalculatorSand for sandboxes, paver bedding and leveling — volume, tons and bags.
- Concrete Bag CalculatorHow many 40, 60 or 80 lb bags of concrete mix for a slab, pad, round footing or a known volume.
Lawn
- Grass Seed CalculatorPounds and bags of seed for a new lawn, overseeding or winter ryegrass, by grass type.
- Sod CalculatorSquare feet of sod, rolls and pallets for your lawn, with editable roll and pallet sizes.
- Lawn Fertilizer CalculatorPounds of product for a target nitrogen rate, from the N-P-K (nitrogen, phosphate, potash) numbers on the bag — or solve for phosphate or potash, or plan a whole season.
- Lawn Area CalculatorSquare footage and acres of an irregular yard from as many rectangles, circles and triangles as you need.
- Lawn Lime CalculatorPounds and bags of lime from your soil-test rate — or from pH and SMP buffer pH when the report gives no rate — adjusted for the product’s calcium carbonate equivalent (CCE) and split into safe applications.
- Soil Sulfur CalculatorElemental sulfur to lower soil pH, by soil type and starting pH, split into safe doses for an established lawn.
- Pre-Emergent & Herbicide Rate CalculatorHow much granular or liquid pre-emergent (or other herbicide) for your area, from the label rate or from an active-ingredient rate — with the water and tank-by-tank mix for sprayers.
Planting
- Plant Spacing CalculatorHow many plants for a bed (square or offset grid) or a hedge row, with flats and cost.
- Square Foot Garden CalculatorPlan a square foot garden: squares in the bed, plants per square, and soil to fill it.
- Potting Soil CalculatorPotting mix for pots, planters, grow bags and window boxes — quarts, cubic feet and bags.
Patios & walls
- Paver CalculatorPavers, base gravel, bedding and joint sand, dig depth and edge restraint for a patio or walkway.
- Retaining Wall Block CalculatorBlocks, caps, buried courses, pad and drainage stone, drain pipe and adhesive for a segmental retaining wall.
- Flagstone CalculatorTons and pallets of flagstone for a patio or path, plus the gravel base and setting bed under it.
Water
- Rain Barrel CalculatorGallons of rainwater from your roof by roof type, how many barrels it fills, and how much of your watering it covers.
- Garden Watering CalculatorTurn “1 inch per week” into gallons, and minutes of run time for your hose or sprinkler.
- French Drain CalculatorClean stone, perforated pipe and filter fabric for a French drain or drainage trench — tons, feet and the fabric width to buy.
- Pond Liner CalculatorLiner size for a garden pond, plus gallons of water and a pump flow range.
Edging, fabric & posts
- Landscape Edging CalculatorFeet of edging, pieces or rolls, and stakes for a bed, tree ring or path.
- Landscape Fabric CalculatorRolls of landscape fabric, strips and staples for a bed or gravel area, with seam overlaps.
- Fence Post Concrete CalculatorBags of concrete (40, 50, 60 or 80 lb) for fence, arbor and mailbox posts, net of the post itself.