Measure areas and edges for any working space. Add setbacks, waste, and depth for planning. Create clear reports that teams can share on site.
| Case | Shape | Inputs | Area | Perimeter | Diagonal/Span |
|---|---|---|---|---|---|
| 1 | Rectangle | Length 30 m, Width 20 m, Setback 0 | 600 m² | 100 m | 36.0555 m |
| 2 | Circle | Diameter 20 m | 314.1593 m² | 62.8319 m | 20 m |
| 3 | Ellipse | Major 30 m, Minor 18 m | 424.1150 m² | 76.9650 m (approx) | 30 m |
Lₙ = L − 2s, net width Wₙ = W − 2s, area A = Lₙ×Wₙ, perimeter P = 2(Lₙ+Wₙ), diagonal D = √(Lₙ²+Wₙ²).r = D/2, area A = πr², circumference P = 2πr.a = A/2, b = B/2, area A = πab, perimeter uses a Ramanujan approximation.A = ½×base×height. Perimeter uses provided sides, otherwise an isosceles estimate.A = (a+b)/2 × h. Perimeter uses legs if provided, otherwise an isosceles estimate.V = A × depth. Wastage applies as Qₙ = Q × (1 + w/100).F = max(0, P − gate).Field dimensions are the foundation of takeoffs, layout, and procurement. This calculator converts common boundary measurements into usable area, perimeter, and diagonal values so crews can size turf, base course, concrete panels, geotextile, or fencing quickly and consistently. Perimeter outputs also support edging, striping, cord, and temporary barrier planning.
Most construction “fields” can be approximated as rectangles, circles, ellipses, triangles, or trapezoids. Choosing the closest geometry reduces error versus guessing a single length and width. Ellipses are practical for tracks, landscaped basins, and rounded pads. For irregular sites, break the boundary into simple shapes, calculate each area, and sum the results.
Keep units consistent from survey to shop drawings. A small unit mismatch can cause major quantity variance, especially when area scales with the square of length. Setbacks help exclude edges for curbs, drainage swales, or access lanes. Typical layout checks compare calculated diagonals to tape or instrument diagonals to confirm squareness and reduce rework before pours or paving.
Area drives most surface quantities, while perimeter controls edging and fence length. Depth adds volume for excavation, fill, or aggregate. Wastage accounts for compaction, trimming, overlaps, and site variability. Use higher wastage for hand-fit areas and lower wastage for controlled, modular systems. For granular layers, remember that loose delivery volume can differ from compacted volume; treat wastage as a practical adjustment for ordering and hauling.
Once the geometry is verified, translate results into cost by applying unit rates: per square unit for finishes, per linear unit for fencing, and per cubic unit for earthworks. Exporting CSV supports estimating sheets, while PDF reports provide a site-ready record of inputs and outputs for review. Keeping a consistent report format helps compare revisions, track scope changes, and communicate assumptions across the field team and office.
Measure the controlling boundary lengths and at least one diagonal where possible. For curves, measure diameter or key radii points. Record units and note any areas excluded by setbacks or obstructions.
Setbacks reduce the effective length and width (or usable axes) to reflect edge exclusions. This helps estimate net usable area for surfacing, markings, or equipment pads instead of gross boundary area.
Use diagonal to check squareness and layout control. If field corners are intended to be right angles, comparing measured and calculated diagonals highlights skew before materials are installed.
Yes. Enter perimeter-based fencing and subtract the gate opening to get net fence length. This is helpful for quick boundary takeoffs and cost checks during early estimating.
Volume is computed as area multiplied by depth. It supports excavation, fill, and base layers. Apply wastage when you expect losses from compaction, trimming, or stockpile handling.
Split the boundary into multiple simple shapes, calculate each portion, then add areas and perimeters as needed. This approach aligns well with field staking and segmented takeoff methods.
Use CSV to paste results into estimating or bid spreadsheets. Use PDF when you need a shareable calculation snapshot for approvals, site packs, or client documentation.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.