What this tool answers
You need a first-pass manual pipe/tubing cutter size before buying. Enter measured OD in inches. The calculator names the smallest class on this site’s ladder — 1.125, 2, or 2.5 in — or returns NO_MATCH. It is not an NPT threader selector and not a powered pipe saw.
OD vs nominal pipe size
Copper and tubing are often sold by OD. Steel pipe NPT names refer to nominal size, not exact OD. Measure OD with calipers when possible. Threader die size is a separate decision (see pipenpt elsewhere in the network).
Class ladder on this site
Classes use published VEVOR US max-OD claims checked 2026-09-10: 1.125 in mini tubing cutter, 2 in tubing cutter set, and 2.5 in ratcheting PVC/PEX cutter. Matching rule: smallest class where published max OD ≥ measured OD.
When the answer is NO_MATCH
If measured OD exceeds 2.5 in, this site returns NO_MATCH. Typical next steps: a larger industrial cutter, a powered saw rated for the material, or a different process. Do not force a consumer cutter past this screen.
Sources
VEVOR US pipe-cutter product pages for max-OD claims (checked 2026-09-10). Consumer practice measuring OD before buying a cutter. Safety framing follows common manufacturer warnings on depressurized lines, securing work, and PPE.