Calculate lawn square footage for grass seed, sod, fertilizer, topsoil and lawn-treatment coverage.
For rectangular lawn sections, multiply length by width. For irregular gardens, split the lawn into simple sections, calculate each one and subtract patios, beds or paths that will not be treated.
Length \u00d7 width = lawn square footageA 40 \u00d7 30 ft rectangular lawn is 1,200 sq ft.
Break it into simple rectangles, triangles or rough sections, calculate each area and add them together.
No, not if you are estimating a product that will only be applied to the lawn. Subtract non-lawn areas.
Around 5–10% extra is common for simple layouts, with more for curved edges and many cuts.
If the label gives an application rate per 1,000 sq ft, divide your lawn area by 1,000 and multiply by the stated rate.