UTCal

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