Pipe Offset Calculator

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Everyone
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About this app

Pipe offset calculator for pipefitters: offsets, rolling offsets, parallel offsets and cut lengths, plus miter and branch (fishmouth) wrap templates printed at true scale.
Type what you measured, check the diagram, read the numbers. Offline, no ads, no account, paid once.

CALCULATIONS
Offset (travel and run), rolling offset with rise and roll, parallel offsets for a set of pipes, and cut length from travel and take-outs. Every result shows the model it used.

TRUE-SCALE TEMPLATES
Miter wrap for 2 to 5 pieces, and lateral or branch wrap with unequal diameters and the header hole. The template prints tiled on Letter or A4, with registration crosses and a scale bar on every page. Print at 100 percent (Actual size) and check the bar with a ruler before you cut.

STANDARD FITTINGS
Pick a pipe size (NPS 1/2 to 24) and a standard elbow to get its take-out. Values are tabulated (ASME B16.9, from a secondary source), shown with their source, and every one can be edited. Type your own size or radius when yours is different.

TYPE IT YOUR WAY
Type lengths the way you say them: 12 1/2", 1' 3 3/8" or 250 mm. Each field shows how your entry was read. Inches and fractions or metric.

SAVE AND SHARE
Save jobs by name, reopen, rename or duplicate them, export a one-page PDF job sheet and the template PDF to print or share. Light, dark and high-contrast themes, and built-in help.

WHAT IT DOES AND DOES NOT DO
It gives numbers and templates. It does not say a layout meets any code or standard, and it does not size supports or check welds. Stated models: centre-to-centre dimensions, outside surface of the pipe with wall thickness ignored, a branch centred on the header. Check a printed template against a ruler and test on a scrap piece before you cut.

PRIVATE AND SIMPLE
Works fully offline. No ads. No account. No data collected. Your jobs stay on your device. Paid once, with no subscription and no in-app purchases.

Questions, problems or ideas? Tap Feedback & support in the app or email support@mirageinteractive.uk. We answer every message.

Made by Mirage Interactive.
Pipe offset, rolling offset, cut length and true-scale miter templates. Offline.
Updated on
Nov 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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What’s new

New: an interactive 3D view of every offset and rolling offset. Drag to rotate, pinch or scroll to zoom, tap a part to see its value. Also new: a short first-run guide you can reopen from Help, and Feedback & support one tap away in the app bar. The printed true-scale templates are unchanged.