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

Counts by fixture type

Required list input.

Units by fixture type

Required list input.

Sum fixture-unit loads from parallel fixture counts and assigned units per fixture; this is not the Hunter demand-curve conversion to flow. 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]

Total fixture units

The resulting total fixture units 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.

• Concrete Order With Waste

  Calculate concrete order volume by adding a specified waste percentage to net placed volume; this is a purchasing allowance, not shrinkage prediction.

• Concrete Slump Water Adjustment

  Estimate revised concrete mixing-water amount from a trial slump and a project-calibrated water change per millimeter of slump; do not treat this as a universal mix-design rule.