Inputs
White themeHow to use
- Select units, enter building length and width.
- Choose roof type, and eave orientation if required.
- Set overhang. Keep “corner extension” checked to add 2×O per side.
- Add optional waste percentage for ordering safety.
- Click Calculate. Review per‑side lengths and totals.
- Export your takeoff using Download CSV or Download PDF.
Results
Total eave length
—
Total with waste
—
| Side | Count | Side length | Subtotal |
|---|---|---|---|
| Run a calculation to see details. | |||
| Total | — | ||
| Total with waste | — | ||
Formula used
The calculator estimates eave linear footage from building plan dimensions and roof type. When corner extension is enabled, each eave side length is extended by 2×O to account for overhang continuing past corners.
- Gable: If eaves run along length:
Total = 2 × (L + ext). If along width:Total = 2 × (W + ext). - Hip:
Total = 2 × (L + ext) + 2 × (W + ext). - Shed:
Total = 1 × (S + ext), whereSis the chosen side (L or W).
ext = (includeCornerExtension ? 2×O : 0), and final ordering length applies waste: Totalwaste = Total × (1 + waste%/100).
Example data
| Scenario | Roof | L | W | O | Corner ext | Total | With 5% waste | Units |
|---|---|---|---|---|---|---|---|---|
| Residential gable | Gable (eaves along L) | 30.00 | 20.00 | 1.00 | Yes | 64.00 | 67.20 | ft |
| Hip bungalow | Hip | 40.00 | 28.00 | 1.50 | Yes | 148.00 | 155.40 | ft |
| Shed roof | Shed (eaves along L) | 24.00 | 16.00 | 0.75 | Yes | 25.50 | 26.78 | ft |
FAQs
It is the total linear footage along the lower roof edges used for gutters, fascia, soffit trims, or drip‑edge ordering.
Along each side, the roof outline extends beyond the wall. If overhang continues past corners, side length effectively increases by about 2×overhang.
Gable roofs have two eave sides (typically along length). Hip roofs have eaves on all perimeter sides. Shed roofs have one eave at the low side.
Yes. Offcuts, laps, and mitered corners create loss. Many projects use 3–8% waste depending on product and crew experience.
Yes. Choose units at the top. All results and exports follow the selected unit.
This tool focuses on eaves. For rakes and ridges, use dedicated calculators; do not include them in eave footage.
Notes
Always verify unique architectural features—bays, curves, or step‑outs—on drawings. Where corners are rounded, corner extensions may differ from the simple 2×O assumption.
Typical Overhangs by Roof Style
Reference values; confirm with drawings and local codes.
| Roof style | Common overhang O (in) | Corner extension used? | Added per side (2×O, in) | Notes |
|---|---|---|---|---|
| Ranch / Truss gable | 12 | Yes | 24 | Standard soffit depth; fascia-friendly. |
| Contemporary low-slope | 18 | Yes | 36 | Deeper eave for shading and drip clearance. |
| Cottage / Craftsman | 9 | Yes | 18 | Decorative brackets; verify profile projections. |
| Minimalist shed | 6 | No | 0 | Flush fascia lines; corner carry often omitted. |
| Coastal hip | 24 | Yes | 48 | Large projection for rain protection; wind strapping common. |
Ordering Guide: Waste & Stock Lengths
| Material | Typical stock length | Suggested waste (%) | Joinery | Common accessory | Notes |
|---|---|---|---|---|---|
| Aluminum K-style gutter | 10 ft / 3 m | 5 | Slip joint / seam | End caps, outlets | Crate long runs; add laps at corners. |
| Painted steel gutter | 3 m | 6 | Riveted seam | Sealant, hangers | Thermal movement; allow expansion gaps. |
| Fascia board (PVC) | 12 ft | 7 | Scarf joint | Inside/Outside corners | Account for miter waste at boxed returns. |
| Soffit panels (vinyl) | 12 ft | 8 | Interlocking | J-channel, F-channel | Vent patterns may dictate cut layout. |
| Drip edge (metal) | 10 ft | 4 | Butt joint | Starter, nails | Minimal waste if cut plan is optimized. |