Tack: Welding Calculator

Tack is a welding calculator and reference for the joint in front of you.

Pick a process, pick a thickness. Two taps and you have a welding settings card: amperage, voltage, wire feed speed, travel speed, shielding gas and stickout. No Calculate button, no form to fill in.

EVERY NUMBER SHOWS ITS WORK
Tap any value and the welding calculator opens the arithmetic: the formula, your numbers in it, and where the value came from. A welding app that will not show you the calculation is asking you to trust it; this one shows you.

IT REFUSES RATHER THAN GUESS
Ask for spray transfer in a vertical position and Tack says no, and says why. Past the thickness a rule of thumb stays honest over, it stops rather than extrapolating.

WELDING CALCULATORS
Weld settings for MIG, TIG, Stick and flux-core. Fillet weld sizing — weld throat, code minimum weld size, capacity. Heat input and arc energy in both conventions. Wire feed speed to amps and back through the burnoff constant. Duty cycle. Deposition rate, consumable use and cost per joint. Weld group as a line. Material and steel weight. Hardness conversion. Shrinkage and distortion control. Oxy-fuel and plasma cutting settings. Unit converter with gauge and fractions. Carbon equivalent. Stainless metallurgy and ferrite number. Electrode classification decoder. Welding symbols. Tungsten selection. Shielding gas guide. Lens shade. Filler metal selector.

WELDING REFERENCE
Welding defects with cause and correction — porosity, undercut, lack of fusion, incomplete penetration, burn-through, spatter, cracking, arc blow. Visual acceptance limits by loading case. Joint types and preparation. Welding positions from 1F to 6G. Metal identification. The heat-affected zone. Welding safety: fume, galvanized coating, hot work, confined space, protective equipment. A glossary in plain words.

FREE FOREVER
Carbon steel welding settings, the welding symbol decoder, fillet weld sizing, heat input, the shielding gas guide and every safety page are free permanently — along with the arithmetic behind every number.

BUILT FOR THE SHOP FLOOR
Works offline in airplane mode. Your calculations never leave the phone. Twenty-two languages. Imperial and metric.

Tack gives starting parameters and reference data. A qualified welding procedure, the governing code and the engineer of record govern. Verify on a coupon before welding production work.