Use this construction calculation for preliminary quantity, geometry, material, load, or coverage planning when dimensions and units have been measured consistently.

Gutter run (m)

Required number input.

Slope (mm/m)

Required number input.

Calculate elevation drop along a gutter from horizontal length and design slope per meter. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Elevation drop (mm)

The resulting elevation drop returned as a number.

• Drainage and flashing dimensions depend on catchment, rainfall, roof or surface geometry, outlet capacity, material, climate, and local detailing. Confirm slopes and terminations against the complete water-management design.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Verify dimensions on site, use current product data and local code requirements, include an explicit waste or safety allowance where appropriate, and obtain qualified structural, electrical, plumbing, or geotechnical review when required.

• Drain Slope Fall Per Foot

  Convert a drain's horizontal run in feet and specified fall in inches per foot into total fall.

• Roof Pitch Angle

  Calculate a roof slope angle from vertical rise and horizontal run, not the rafter length.

• Wire Voltage Drop

  Estimate round-trip DC voltage drop of a two-conductor circuit from one-way length, conductor resistance per meter, and current.