Landscaping & yard calculators
Gravel, stone, mulch, compost, topsoil, sand, sod, seed, fertilizer, plants, fences and walls — how much to order for your yard.
- Compost calculatorWork out how much compost you need for new beds, existing beds and lawns in cubic yards and bags, using Oregon State Extension's application depths.
- Cubic yard calculatorConvert length, width and depth into cubic yards, cubic feet and cubic meters for soil, mulch, gravel, sand or concrete. Rectangles and circles.
- Dirt calculatorWork out how much fill dirt or topsoil to order for any area and depth, in cubic yards and tons, with extra for settling and an optional cost estimate.
- Fence calculatorEnter your fence length and post spacing to get the number of posts, rails and pickets, plus 80 lb bags of concrete to set the posts.
- Fence post calculatorCalculate how many fence posts you need with corners and gates, how long to buy them, how big to dig the holes and how much concrete to set them.
- Fertilizer calculatorCalculate how many pounds and bags of lawn fertilizer you need from your lawn size, the N-P-K numbers on the bag and the nitrogen rate.
- Fill dirt calculatorCalculate how much fill dirt you need to fill a hole, raise a yard or backfill — in cubic yards, tons and dump-truck loads, with compaction included.
- Grass seed calculatorCalculate how many pounds of grass seed you need for a new lawn or overseeding — tall fescue, Kentucky bluegrass, ryegrass mix or bermudagrass.
- Gravel calculatorFind how many tons and cubic yards of gravel, pea gravel, crushed stone or river rock you need for a driveway, path or base, with cost per ton.
- Mulch calculatorWork out how much mulch you need in cubic yards and 2 or 3 cu ft bags from your bed size and depth, with the depths extension services recommend.
- Pea gravel calculatorFind how much pea gravel you need for a patio, path or play area in tons, cubic yards and 0.5 cu ft bags, with an optional price per ton.
- Plant spacing calculatorCalculate how many plants fit in a bed or area from the spacing on the tag, in a square grid or staggered rows, with plants per square foot and cost.
- Raised bed soil calculatorCalculate how much soil you need to fill raised garden beds in cubic feet, cubic yards and bags, with the compost and topsoil split and extra for settling.
- Retaining wall calculatorCalculate retaining wall blocks, cap blocks, base gravel and drainage stone from wall length, height and block size, with a buried first course.
- River rock calculatorCalculate how much river rock you need for beds, borders and dry creek beds in tons, cubic yards and 0.5 cu ft bags, with an optional price per ton.
- Sand calculatorCalculate how much sand you need for a sandbox, paver base or fill in tons, cubic yards and 50 lb bags, with an optional price per ton.
- Sod calculatorWork out how much sod to order for your lawn in square feet, pallets, slabs or rolls, with extra for cuts and an optional price per pallet.
- Stone calculatorCalculate crushed stone, gravel, pea gravel or river rock in tons, cubic yards and 0.5 cu ft bags for a base, path or bed, plus a guide to stone sizes.
- Topsoil calculatorCalculate how much topsoil you need for a lawn or garden bed — in cubic yards for bulk delivery and in 0.75, 1 or 1.5 cu ft bags — with settling included.