UTCal

v1.2 — now with encoder calibration, stainless steel pipe schedules, and a free trial for advanced calculators. Tap into the UT Bible built for the field.

Your UT Bible, built for the field. Skip distance, D1.1 acceptance, beam path diagrams, encoder calibration, pipe data, and code criteria — offline, right in your pocket.

Built by a working NDT tech for working NDT techs. No account. No internet. No subscription. Runs entirely on-device.

CALCULATOR • Skip distance, half skip, and full skip for any angle and thickness • Beam spread — near-field distance, half-angle, and full spread • D1.1 indication rating calculator • Fracture mechanics calculator — ASME VIII Div 2/3 • Imperial and metric — switch units anytime • Encoder step resolution converter — steps/mm ↔ steps/in, with target distance conversion for OmniScan calibration • Stainless steel pipe schedules where wall thickness differs from carbon steel (dual ASME standard support)

BEAM PATH DIAGRAM • Interactive cross-section of your beam path through the material • Drag the probe to see coverage and position change in real time • Rotate to landscape for a fullscreen diagram

WELD OVERLAY • Overlay Single V or Double V weld joint profiles on the beam path diagram • 5 standard weld presets, or enter custom bevel angle, root opening, and root face • Index offset calculation — see where your probe index point needs to be relative to the weld centerline

PIPE DATA • NPS 1/8" through 48" per ASME B36.10M • Wall thickness, OD, ID, and scan length for every standard schedule • Apple Watch companion — quick pipe lookups right on your wrist • Fast lookup — shop floor or field

CODE ACCEPT/REJECT CRITERIA • ASME Section V, Article 4 • ASME B31.3 — Process Piping • AWS D1.1 — Structural Welding • API 1104 — Pipeline Welding • Inches and millimeters, side by side

PRESETS & SAVED CALCULATIONS • Free: save and reload calculations with names and optional notes • Pro: unlimited custom presets for your most-used setups — load in one tap • Pro is a one-time purchase. No subscription, ever.

WHY UTCAL • Built by a UT tech who got tired of doing skip math on a paper napkin • Works on the roof, in the ditch, in the shop — no signal required • Updated for the latest ASME, AWS, and API editions

Questions or feature requests: support.utcal@carboncode.app