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ROBOT MOWER GUIDE

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Lawn coverage planning

Lawn coverage planner

Compare your measured lawn with the capacity figure printed on an exact listing, and your steepest slope with the stated slope rating. Unit arithmetic only: it does not recommend a model, test a mower or predict mowing time.

1. Your measured lawn

Measure only the grass the mower will actually cut. One acre is 43,560 square feet. These example values are illustrative, not a product claim.

2. Figures copied from the exact listing

Copy the acreage and slope percentage exactly as the listing prints them. A quarter acre is 0.25; a listing that gives square feet converts at 43,560 per acre.

Your result

Coverage margin and slope check

Enter your lawn area and a stated capacity to check the margin.

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How to read the result

Lawn acres = square feet ÷ 43,560 (the US survey acre). Margin = (stated capacity − lawn acres) ÷ stated capacity × 100. A positive margin means your lawn is smaller than the seller’s coverage figure; a negative margin means it is larger. The slope check only compares two percentages you entered. No conversion constant other than the acre definition enters this calculation, and nothing here measures how a mower actually performs.

For example, 8,000 square feet is 0.184 acres. Against a stated quarter-acre capacity that is a 26.5% margin; against a stated 0.15-acre capacity the lawn exceeds capacity by 22.4%. Sellers state capacity under their own assumptions about mowing frequency, obstacles and grass type, so a small positive margin is not a guarantee.

Before choosing a mower

  1. Measure the mowable grass area, not the whole lot.
  2. Find the steepest section and estimate its grade as a percentage (rise ÷ run × 100).
  3. Read the stated capacity, slope rating and navigation wording on the exact listing.
  4. Check where the base station or RTK antenna must go according to the manufacturer manual.

Read the lawn capacity guide and our research methodology. This calculation does not establish mowing performance, positioning accuracy or safe operation.

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