Takeouts for butt-weld elbows straight from the ASME B16.9 tables, plus an optional cut length calculator for pipe between two fittings.
Nominal pipe size. Butt-weld fittings per ASME B16.9.
Long radius (1.5D) is the default in most piping. Short radius (1D) for tight spots.
Optional: Cut Length
Inches between fitting centers.
Cut length between fittings
About this calculator
The takeout (center-to-face dimension) is how much of a run each butt-weld fitting "takes up." To cut pipe between two fittings:
Cut length = Center-to-center − Takeout A − Takeout B
Takeouts come straight from the ASME B16.9 dimension tables, not a formula. The rules of thumb still hold for most sizes: a long radius 90 takes out 1.5 × NPS (a 6" LR 90 = 9"), a short radius 90 takes out 1.0 × NPS, and an LR 45 takes out roughly 0.625 × NPS — but small sizes deviate from the pattern, which is why this tool uses the published table values.
Note these are weld fitting dimensions — they don't include root gaps. If your fit-up calls for a 1/8" gap at each weld, subtract that too.
Note: Takeouts are ASME B16.9 nominal center-to-face dimensions for standard butt-weld fittings. Verify against actual fittings on critical work, and remember to account for root gaps at each weld.
Made by the makers of the TNB Roll Out Wheel
A truck-mounted pipe positioner that chucks up, rotates, and locks pipe for solo field welding. Built by pipe welders, for pipe welders.