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

Elevation Change Meters (m)

Required number input.

Horizontal Run Meters (m)

Required number input.

Signed site grade percentage from elevation change divided by horizontal run; positive means the endpoint is higher. 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]

Slope Percent (%)

The resulting slope percent returned as a number.

• A quantity estimate or simplified engineering formula is not a building-code check, stamped design, manufacturer approval, or site inspection. Material properties, tolerances, waste, moisture, workmanship, loads, local conditions, and code requirements can change the result.
• 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.

• Excavation Slope Ratio

  Horizontal run per unit vertical rise of an excavation slope; this geometric ratio is not a safe-slope determination.

• Drain Slope Fall Per Foot

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

• Gutter Slope Fall

  Calculate elevation drop along a gutter from horizontal length and design slope per meter.