A patio paver calculator works in area, and the same sum serves as a paving calculator for a walkway. Each paver owns its own face plus half the joint on every side, so the count is the patio area divided by (paver length + joint) × (paver width + joint). That is why a patio laid with joints needs slightly fewer pavers than plain area ÷ face area. Then waste is added and the result is rounded up to a whole paver.
Small patios have a second check. Cut pavers at the edge each use a whole paver unless the offcut fits somewhere else, so the calculator also counts a plain grid of whole pavers plus a cut row on each side, in whichever direction takes fewer. If that number is higher than the area figure with waste, it wins. This matters on small or awkward patios, where the area sum can come up a few pavers short and the replacement pallet will not match the colour.
Base and bedding sand are boxes: area × depth, converted to cubic yards. That is the sum behind any paver base calculator or paver sand calculator. The base is crushed stone sold by weight, so the volume is multiplied by a compacted density. Bedding sand is screeded, not compacted. The edge restraint is the full perimeter. Add a price per paver, per ton of base and per yard of sand, plus an installer's rate per ft², and you get the total and the cost per square foot. That is what a paver patio cost calculator or a cost to install pavers calculator reports.
For a circle, switch Shape to Circle and enter the diameter. The area is π × radius², so a 10 ft circle is 78.5 ft², and the edge restraint is the circumference, π × diameter. A fire pit ring needs two diameters: choose Ring, then enter the outside diameter and the hole. The area is π × (outside² − hole²) ÷ 4, so you do not pay for the hole. Pavers cut to a curve waste more, which is why the hint for a circle or ring is 15–20%.
Mark the patio corners first with the squaring calculator, and plan where the water goes with the French drain cost calculator. To weigh the cost against wood or composite for the same space, run the size through the deck calculator.