Border Area Calculator — Curved & Irregular Borders
Work out the area of curved or irregular garden borders.
How We Calculate This
Rectangular borders: Area = Length x Width. Tapered borders use the trapezium formula: Area = Length x (narrow + wide width) / 2.
Curved borders add approximately 10% to account for the extra area created by curves.
Edging length is the total border perimeter (front edge plus returns), accounting for curves where applicable.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.