Roofing & Exterior
Convert measured gutter runs into linear footage and stock-section quantity. The calculator intentionally does not size gutter profile or downspout capacity.
Change the defaults to match your project and the product you plan to buy.
Project result
See the net gutter run, allowance-adjusted linear target and whole stock-section count.
Planning estimate only. Verify product coverage, package size, supplier specifications and project requirements before purchasing.
Choose the right tool
You know measured eave runs and stock section length and need gutter linear stock.
Use Roof Area for roof geometry; this tool does not size gutter/downspout hydraulic capacity.
Methodology
measured eaves − excluded sections
Only edges receiving gutter.
net run × (1 + allowance)
Adds cuts and unusable short offcuts.
target ÷ section length
Rounds to whole pieces.
sections × price
Optional gutter-stock-only cost.
Measure each eave edge that will receive gutter and total the runs. Exclude edges that intentionally have no gutter. If the project has many corners or short segments, record those sections because pure total linear footage can overestimate offcut reuse.
Gutter and downspout sizing depends on roof drainage area, rainfall intensity, slope, outlet arrangement and system design. This calculator does not perform hydraulic sizing. Use it only after the gutter profile and drainage system have been selected, then verify fittings, outlets, hangers and downspouts separately.
Reference
| Planning item | Starting point | Verify / adjust |
|---|---|---|
| Eave run | measured gutter edges | Use actual roof edges. |
| Excluded run | intentional no-gutter zones | Subtract only known exclusions. |
| Allowance | cuts/seams | Complex layouts reduce reuse. |
| Drainage capacity | separate design | Not calculated here. |
Questions
No. It estimates stock length only; hydraulic capacity and profile sizing require a drainage design.
No. Downspouts, outlets, elbows, hangers and other fittings are separate.
Corners, short segments and damaged cuts can reduce how efficiently full stock lengths are used.
Planning guides
Roofing & Exterior
Measure gutter eave runs and convert them into stock sections without confusing linear material quantity with drainage sizing.
Read guide →Estimate simple gable roof surface area from building footprint and roof pitch, with separate eave/overhang inputs and no material waste.
Open calculator → Roofing & ExteriorEstimate siding purchase coverage from exterior wall dimensions, major openings, waste allowance and product package coverage.
Open calculator → MeasurementCalculate total linear footage from repeated segments and estimate whole stock pieces with an optional waste allowance in US or Metric units.
Open calculator →