Construction & Landscaping Calculators
Free calculators that answer the question you're actually asking at the store: how many bags, tons, blocks, or rolls do I buy? Every tool accepts feet-and-inches with fractions (8' 6 1/2"), includes a realistic waste allowance, and prints a materials list you can take to the yard.
Concrete
Concrete Fence Post CalculatorHow many bags of concrete per fence post? Enter your post size, hole diameter, and depth to get the exact number of 40, 50, 60, or 80 lb bags to buy.
Sonotube / Concrete Footing CalculatorCalculate concrete for sonotubes and deck footings.
Shed Base Concrete Slab CalculatorHow much concrete for a shed slab? Enter length, width, and thickness to get cubic yards and bags for a 8x8, 10x12, 12x16 or any custom shed base.
Gravel & Drainage
Gravel Driveway CalculatorHow much gravel for a driveway? Enter length, width, and depth to get tons and cubic yards of crushed stone, with per-layer guidance for base and top coats.
Pea Gravel CalculatorCalculate pea gravel for patios, walkways, and playgrounds.
French Drain Gravel CalculatorHow much gravel for a french drain? Enter trench length, width, and depth — the calculator subtracts the pipe volume and gives tons and cubic yards of drainage rock.
Landscaping
Mulch CalculatorHow much mulch do I need? Convert bed square footage and depth into 2 cu ft bags, 3 cu ft bags, or cubic yards — and see when bulk beats bags on price.
Raised Garden Bed Soil CalculatorHow much soil for a raised bed? Enter bed dimensions to get cubic feet, bags, and a 60/30/10 topsoil-compost-aeration mix for any 4x8, 4x4 or custom bed.
Sod CalculatorHow much sod do I need? Convert your lawn's square footage into rolls and pallets with a waste allowance for cuts and curves, plus per-pallet coverage notes.
Pavers & Walls
Retaining Wall Block CalculatorHow many retaining wall blocks do I need? Enter wall length and height to get block count, cap blocks, and the gravel base and backfill in tons.
Paver Base & Sand CalculatorCalculate the gravel base and bedding sand for a paver patio: enter your patio size and get crushed stone and sand quantities in tons and cubic yards.
Polymeric Sand CalculatorHow many bags of polymeric sand do I need? Coverage varies 2x with joint width — enter your patio size and paver type to get an accurate 50 lb bag count.
Why MeasureTwice?
Most material calculators hand you an abstract number — cubic yards to four decimals — and leave the store math to you. We built these tools around the purchase: bag counts by bag size, tons the way quarries sell them, pallets the way sod farms load them. Everything runs instantly in your browser, nothing is tracked to use a calculator, and no sign-up is ever required.