Tools
Calculators
Mini applications. Dimensional math, labeled assumptions, shareable inputs.
Fence Calculator
Enter length, height, and material. We estimate posts, panels, and bagged concrete from standard residential spacing — then total them at the prices you enter.
Deck Calculator
Length × width and joist spacing. Outputs area, joist count and decking rows, and a total at the prices you enter.
Deck Stair Calculator
Enter the height from the ground to the deck and a tread depth. It lays out the fewest risers the code allows, the treads, the run and the stringer, and checks the risers, treads, nosing, width and flight against the residential code's stair figures.
Deck Railing Calculator
Enter the space between two posts and the baluster width. It counts the balusters that keep every gap under the code's sphere, gives the spacing to mark out and the guard's height, and totals the sections.
Concrete Calculator
Slabs, footings, and fence-post holes. Volume from length × width × depth, converted to cubic yards and bag counts.
Gravel Calculator
Tons from the Tennessee DOT's factors for No. 57 stone and dense-graded base. Depth is the driver — don’t guess it.
Lumber Calculator
Board feet = thickness(in) × width(in) × length(ft) / 12. We also show a simple piece count for repeated stock.
Mulch Calculator
Beds and tree rings. Most beds want 2–3 inches; more than 4 inches against trunks is how you kill trees.
Sand Calculator
Area × depth to cubic yards, then dry weight from the FHWA range for clean sand, loosest to densest, and the 50-lb bag count.
Topsoil Calculator
Lawns and beds. Extension guidance puts a lawn's soil at 4 inches minimum and 6 or more ideally — measure what is there first.
Paver Calculator
Counts pavers with a cutting allowance, sizes the compacted base at the association's minimum and the 1-inch bedding sand, and totals it at your prices.
Pool Volume Calculator
Pick the shape and enter the size and the water depth at each end. It gives the water surface, the cubic feet, and the gallons and liters by NIST's conversion factors, with the hours to fill at your hose's flow.
Turf Calculator
Artificial Turf Supply's standard rolls are 15 ft wide, so the calculator lays strips that wide the way that buys the least, and gives the seams, the offcut and the infill; for sod it adds about 5 percent and counts pallets.
French Drain Calculator
A French drain is a trench of washed gravel around a perforated pipe, wrapped in fabric. The calculator sizes the gravel, pipe and fabric for one straight run, keeps 2 inches of gravel under the pipe and 6 over it, and gives the fall at a 0.5 to 1 percent slope.
Deck Footing Calculator
Enter the joist length and the post spacing. The calculator works out the deck area one post carries, then reads the footing size and the tallest allowed post from the residential code's deck tables.
Square Footage Calculator
Enter each piece of the area as a rectangle, triangle, circle or trapezoid in feet. The calculator adds the pieces and converts the total to square yards, square meters and acres by NIST's units.
How the calculators work
Each calculator is standard dimensional math with its assumptions on the page: post spacing, hole diameter, joist spacing, bag yield, waste. Change an assumption and the result changes with it. Where a count has to be rounded, it rounds toward the safe quantity — a partial fence bay gets its own post, a partial joist bay never exceeds the spacing you chose — because a number that is slightly high costs a bag; a number that is slightly low costs a second trip. The formulas live in tested modules, and every page explains its own math below the tool.
What they do not do
They do not design structure. Beams, footings, ledgers, guards and frost depth come from a prescriptive guide, the manufacturer or an engineer. They do not price your lot: they multiply the takeoff by prices you enter from a local quote or store shelf and fill in none of their own. And they do not know your city — an exempt project on one side of a county line is a permit on the other. Use the permit checker for the pattern and the Project Brief to turn the quantities into a scope a contractor can price.