Ducts calculators.
Calculate supplied shell geometry, full sheet blanks and measured coating faces. No airflow sizing, gauge, fire rating or system performance is selected.
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Rectangular Duct Jacket Sheet Blank Calculator
Develop a supplied rectangular jacket perimeter plus seam extra into complete blanks and allocate those blanks to stock sheets.
Open calculatorDuctsRound Duct Sleeve Sheet Blank Calculator
Develop measured circular sleeves into flat rectangles using supplied seam and end extras, then preserve whole blank fit.
Open calculatorDuctsDuct End Plate Sheet Blank and Aperture Calculator
Allocate full rectangular plate blanks with supplied edge extensions; deduct known apertures only from retained material area.
Open calculatorDuctsRectangular Duct Exterior Coating Quantity Calculator
Measure four exterior duct faces and only the supplied exposed end faces, then deduct known uncoated area.
Open calculatorDuctsCentred Rectangular Duct Transition Sheet Area Calculator
Measure the four trapezoidal faces of an already specified centred rectangular transition, excluding seam and flange stock.
Open calculatorDuctsSupplied Round Elbow Shell Coating Quantity Calculator
Calculate curved lateral area of a specified circular elbow for coating quantities, excluding end faces.
Open calculatorMeasure and check your purchase assumptions
How to measure and order: duct shell sheets and measured coating faces
Which measurements and product data prevent quantity mistakes for this job?
Read guideguideZero-seam reference versus supplied seam blank fit: quantity checks
Seam extensions can change whole blank fit even when the added net area seems small. Pure surface area is not a complete cutting order.
Read guide