For the things you want to make

A little planning.
A better project.

From the first garden bed to the last deck board. Find the right quantities, then get your hands dirty.

Find your calculator
38 practical toolsUS & metricAlways free
The calculator collection

A tool for every part of the project.

38 calculators

Free to use · No account needed

Gravel calculator

Estimate gravel volume, bags and supplier-based weight for paths and driveways.

Pea gravel calculator

Plan rounded gravel for garden paths, beds and decorative areas.

Sand calculator

Calculate sand volume and optional weight from your supplier’s density.

Paver sand calculator

Estimate the bedding sand layer beneath a paved area.

Mulch calculator

Work out bulk mulch and whole bags for beds and borders.

Rubber mulch calculator

Estimate rubber mulch volume using the depth and package size you choose.

Topsoil calculator

Calculate soil volume, bag quantities and comparable local costs.

Fill dirt calculator

Estimate the fill required to raise or level a measured area.

Crushed stone calculator

Estimate angular aggregate for base courses, paths and drainage projects.

River rock calculator

Plan decorative stone coverage, whole bags and optional tonnage.

Landscape rock calculator

Estimate decorative rock for beds, borders and open landscape areas.

Soil calculator

Estimate soil needed for a garden bed, planter or lawn repair.

Compost calculator

Estimate compost for a measured layer or a garden-bed amendment.

Stone calculator

Convert area and depth into stone volume, bags and optional weight.

Road base calculator

Estimate the base material beneath a driveway or paved surface.

Crusher run calculator

Estimate graded crusher run for a planned compacted layer.

Aggregate calculator

Estimate a loose aggregate layer and convert using your supplier’s density.

Grass seed calculator

Find the seed weight for a lawn using the application rate on your seed label.

Concrete calculator

Estimate concrete for slabs, footings, round columns and hollow cylinders.

Concrete slab calculator

Work out concrete yardage and bag yield for a flat slab.

Asphalt calculator

Estimate asphalt volume and tonnage using a mix-specific bulk density.

Asphalt tonnage calculator

Convert measured asphalt volume to US short tons or metric tonnes.

Rebar calculator

Estimate a rectangular reinforcement grid, bar lengths and conservative stock counts.

Drywall calculator

Estimate sheets for the walls and optional ceiling of a rectangular room.

Paint calculator

Estimate paint and whole cans from wall area, coats and labeled coverage.

Brick calculator

Estimate face bricks from wall area and the brick-and-joint module.

Block calculator

Estimate concrete masonry units from wall area and joint dimensions.

Roofing calculator

Estimate roof surface, roofing squares and bundles for a simple uniform-pitch roof.

Paver calculator

Estimate paving units and packages from area, dimensions and joints.

Paver base calculator

Estimate the aggregate base beneath a patio, path or paved area.

Retaining wall calculator

Count block courses, buried courses and caps for a straight segmental wall.

Tile calculator

Estimate tiles and whole boxes from surface area and joint width.

Fence calculator

Estimate posts, pickets and rails for a straight fence with an optional gate.

Board foot calculator

Calculate lumber volume in board feet using the dimensions of your boards.

Log board foot calculator

Estimate log yield with Doyle or a continuous Scribner formula.

Lumber calculator

Estimate stock boards for identical cuts, including saw kerf and end trim.

Decking calculator

Count deck-board rows and stock lengths for a straight rectangular layout.

Flooring calculator

Estimate whole flooring boxes from net area and labeled box coverage.

Know what is in your estimate

Your measurements.
Visible assumptions.

Use US or metric units, adjust the allowance, and check a worked example. Product sizes, density and prices stay in your hands.

Read our calculation method →