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Pipe Bevel Calculator

Work out your weld prep dimensions. Enter wall thickness, bevel angle, and land to get the bevel depth, horizontal width, and face length.

In inches. For Schedule 40 6" pipe, enter 0.280.
In degrees per side. 37.5° is typical for open-root carbon steel pipe. Check your WPS.
In inches. 1/16" (0.0625) is common. GTAW can use less; heavy wall may use more.
In inches. Target fit-up gap. 3/32" (0.094) for stick, 1/8" (0.125) for open-root TIG are typical.
Joint cross-section (updates as you type)

About this calculator

This tool calculates single-V bevel geometry for pipe butt welds. Given the wall thickness, bevel angle, land, and root opening, it returns:

Bevel depth = Wall − Land — the vertical distance the bevel covers.

Bevel width = Depth × tan(Angle) — the horizontal setback across the pipe end (per side).

Face length = Depth ÷ cos(Angle) — the length along the beveled face itself (useful for estimating grind or cut time).

Total groove width at top = 2 × Bevel width + Root opening — the full opening from OD to OD after fit-up. This is what you'll actually measure across the top of the joint.

A 37.5° bevel per side with a 1/16" land and 3/32" root opening is typical for open-root SMAW on carbon steel pipe (API 1104 and many B31 procedures). Stainless, GTAW-only, heavy wall, or code work can call for different values — always match your WPS when one is specified. Compound and J-bevels are also common on heavy wall pipe to reduce weld metal volume; this calculator assumes a straight V.

Note: Results are geometric calculations for standard V-bevel prep. Always follow your welding procedure specification (WPS) when one applies, and verify prep dimensions before welding on code work.

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.

See the roll out wheel