How this calculator works
The calculator finds the perimeter of your bed and adds 5% for cuts around curves and corners — the same allowance used for sod — then converts it to whichever way your edging is sold: 20 ft flexible rolls or 4 ft rigid sections, each with the stakes needed to anchor it.
2 × (20 + 10) × 1.05 = 63 ft → 63 ÷ 4 = 16 sections, with 32 stakes (2 per section).
Flexible vs. rigid edging
Flexible roll edging bends easily around curves and is cheaper per foot, making it the better fit for organic bed shapes. Rigid sections hold a straighter, cleaner line and resist lawn-mower damage better, which makes them the common choice for straight bed borders next to a lawn.
Frequently asked questions
How much edging do I need for a 20x10 garden bed?
The perimeter is 60 ft; with 5% extra for corners that’s about 63 ft — 4 rolls of 20 ft flexible edging, or 16 sections of 4 ft rigid edging.
How many stakes does landscape edging need?
Flexible edging typically needs a stake about every 2 ft to hold its shape. Rigid sections usually come with 2 stakes per section built into the connection points.