Fence Materials Calculator — m, posts, boards, cost
How to use this calculator
Enter total fence length and height in metres or centimetres, choose a fence type (privacy, picket, horizontal, or post & rail), then configure post spacing, sizes, and board dimensions. Results update instantly with posts, rails, boards, concrete bags, and linear metres of timber.
Fence types — Privacy uses vertical boards with no gaps, Picket adds a gap between boards, Horizontal runs boards flat between posts, and Post & Rail has no infill boards.
Concrete — auto-calculates 25 kg bags needed per post hole based on post size and depth.
Hardware — optional nails/screws, post caps, and gate hardware.
Saved Calculations
| Time | Length | Height | Posts | Rails | Boards | Concrete | Total |
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How to Calculate Fence Materials (Metric)
This fence calculator estimates posts, rails, boards or pickets, concrete bags for post holes, total linear metres of timber, and optional hardware and cost for four fence styles: privacy, picket, horizontal, and post & rail. Enter total fence length in metres or centimetres, select height (1.2, 1.5, 1.8, or 2.4 m), post spacing (1.8 or 2.4 m o.c.), and board dimensions.
Concrete for Post Holes
Each post hole is calculated as a cylinder: diameter = post width + 100 mm for 90×90 posts or + 150 mm for 140×140 posts, depth per your selection (60, 75, or 90 cm). Volume is converted to 25 kg bags at approximately 12 litres per bag. Typical recommendation: 2–3 bags per post for 90 mm, 4–6 bags for 140 mm.
Board and Picket Count
Privacy fence: boards = (fence length in mm) / board width. Picket fence: pickets = (fence length in mm) / (picket width + gap). Horizontal fence: boards per section = (fence height in mm) / board width, multiplied by number of sections. Post & rail: no infill boards calculated.
Export & Save
Save calculations to history and export as text, CSV, JPG, or PDF. All estimates are for planning — verify with local codes and a qualified contractor.
