Field Calculators
Start with the calculation you need.
Simple Offset
Run, travel and final cut after takeouts.
The exact substitutions will appear here.
Rolling Offset
Resolve rise + roll into the true offset.
Equal-Spread
Equal center-to-center spread across the whole bank.
Pipe Weight
Weight from OD, wall and length using a steel-density assumption.
Saddle / Lateral
Centered cylinder-intersection geometry for the branch cut only.
Miter
Single-cut miter layout. Angle is the cut angle measured from square.
Live Geometry
The drawing follows the active calculation.
The viewer is intentionally self-contained. It does not pretend to be a code-compliance model or replace field verification.
Cut Sheets & Jobs
Keep the job information with the math.
Current Cut Sheet
Saved Jobs
Project Backup
Export/import JSON to move your local jobs and fitting records between devices. Imported JSON is treated as data; no code is executed.
Learning Mode
Practice the same math without touching a live job.
Apprentice Mode
Short field-math questions with hints.
Unit Converter
Decimal inches, feet/inches/fractions and millimeters.
Formula Reference
The formulas are shown so the user can independently check the result.
Fitting & Takeout Records
Provenance first. Never invent a takeout.
Add a Verified Record
Saved Records
PipeDog Pro
The free field calculator is the foundation. Pro is where the time-saving workflow will live: more calculators, verified fitting libraries, advanced offsets, shareable cut sheets and job organization.
Source, edition and manufacturer traceability instead of mystery takeouts.
Compound offsets, flange work, back-to-back fittings and additional field geometry.
Templates and cut sheets designed for actual shop/field use.
Anything that has not been independently verified is labeled as such.
No payment is required to use this version. Pricing can be added after real tradespeople use the site and we know which Pro features are worth paying for.
Quality Control
Run the built-in arithmetic regression checks any time. The checks cover every field calculator in this release.
Core QA
Runtime Diagnostics
QA checks arithmetic. It does not certify fitting dimensions, weld procedures, reinforcement design or code acceptance.