Mode & units

Mode Units Decimals

Geometry

Pipe OD e.g., 2.000 in = 50.8 mm Cut angle from square (°) 0 = square cut; 45 = common miter Nose allowance Optional extra to keep a small nose

Template & page

Paper Seam overlap Extra width for taping the wrap Tick spacing on top 0 to disable

Resolution (points) Label size First mark offset Shift pattern from left edge

Preview

Print at 100 percent (no fit-to-page). Cut the template, wrap around the pipe, align the seam band, and mark the curve.

Enter your dimensions and select Generate.

Enter your details and select Generate.

Method & formulas

Miter cut: OD = D, R = D/2, angle α from square. Unwrapped height with φ in [0,2π]:
h(φ) = R · tan(α) · (1 − cos φ)
Fishmouth 90° tee: Branch r to main R. Axial depth:
x(φ) = √(R² − r² cos²φ)
Template height with nose offset L:
h(φ) = L + x(φ) − x(0)
Thin-wall development. Add bevel/kerf allowances as needed.

About this free pipe template generator

This online pipe template generator prints wrap-around patterns for miter cuts and 90° fishmouth saddles. It uses cylinder-intersection geometry to create a true-size SVG you can print at 100 percent, tape to your pipe, and cut along the line. Works for steel, copper, aluminum, EMT, PVC, and most round tube or pipe.

Tips for cleaner cuts

Measure OD, not nominal size; many nominal designations differ from true OD.
Print a quick paper test and check all the way around before cutting the real part.
Add a small nose allowance for miters if you want extra material to fine-fit.

Pipe template FAQ

What does “angle from square” mean?

It is the angle between a square cut and your miter plane. 0° means a square cut; 45° is a common miter for two equal pieces.

Does the fishmouth work for angled tees?

This version outputs a perpendicular (90°) saddle. You can fine-fit for slight angles by sanding or grinding. Angled-tee math is planned for a later update.

How do I scale the print correctly?

In your print dialog, choose Actual size or 100 percent. Do not use fit-to-page or shrink-to-fit. A small ruler bar is included on the SVG to verify scale.