Tackwright Welding Calculator

Tackwright is a welding calculator for welders, fabricators, welding inspectors, estimators and students. It works like a hardware calculator: an oxide-red chassis, real keys and a clear LCD, with each answer labelled so you know what you are reading.

FILLET AND GROOVE WELDS
• Fillet weld cross-section, throat (0.707 × leg) and face width from the leg size
• Convexity or reinforcement added to the cross-section
• Groove cross-section and face width for single V, single bevel, double V, double bevel and square grooves, from plate thickness, groove angle and root gap

WELD METAL AND FILLER
• Weld metal volume and weight, per foot or metre and in total
• Carbon steel, stainless or aluminium, or type any cross-section area
• Filler metal to buy from typical deposition efficiencies for SMAW, GMAW, FCAW, GTAW and SAW, or your own percentage

HEAT INPUT
• Heat input in kJ/in and kJ/mm from volts, amps and travel speed
• Q = k × arc energy, with ISO/TR 17671-1 thermal efficiency factors per process
• The travel speed for a target heat input

ARC TIME AND LABOUR
• Arc time from deposition rate or from travel speed
• Welder time at your operating factor

CARBON EQUIVALENT
• IIW carbon equivalent, typed element by element from the mill certificate
• Higher CE means more hardening risk: set preheat per the governing code

WORKS THE WAY YOU DO
• Inches or millimetres, fractions or decimals
• A results strip shows every solved value at once
• 10 memories, a tape of your calculations, reference tables (processes, densities, fillet sizes, CE) and a key guide
• Export a job strip: the tape with inputs, stamped and ready to attach to a lift plan, sign-off or take-off, as text or PDF

TRY PRO FREE FOR 7 DAYS
Try every feature free for 7 days, then keep Pro with a yearly subscription. Cancel anytime in Google Play. No ads, works offline.

PRIVATE BY DESIGN
Works offline, no account, no data collected.

How it's calculated: the formulas and tables behind every result, at https://wrightcalc.app/tackwright/

Questions or feedback: [email protected]

For estimating and planning. Efficiencies and densities are typical values: check the filler maker's data. Verify every result against the welding procedure specification and the applicable code; it does not replace a qualified procedure or preheat requirement. The developer accepts no liability for loss or damage arising from use.