Welding Amperage Calculator (Stick)
Current window for an electrode size — the 35–40 A/mm rule plus position trim.
3.15 mm rods run 95–125 A; 4 mm, 120–160. Too cold: slag traps and porosity. Too hot: undercut and a flat, spattery bead. The rod packet's printed range trumps any rule.
Formula
Welding Amperage Calculator (Stick) is a free welding amperage for welding engineers, fabricators and CWI inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Welding Amperage Calculator (Stick)
Current window for an electrode size — the 35–40 A/mm rule plus position trim. The calculation implements I ≈ 30–40 A per mm of core wire, minus 10–15% out of position (Electrode manufacturer data; trade rule). 3.15 mm rods run 95–125 A; 4 mm, 120–160. Too cold: slag traps and porosity. Too hot: undercut and a flat, spattery bead. The rod packet's printed range trumps any rule.
How to use Welding Amperage Calculator (Stick)
- 1Enter Electrode diameter in mm.
- 2Enter Position (1 flat/horizontal · 2 vertical-up (−10%) · 3 overhead (−15%)).
- 3Read Lower bound, Upper bound instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Welding Amperage Calculator (Stick)?
- ✓Implements the standard formula — I ≈ 30–40 A per mm of core wire, minus 10–15% out of position
- ✓Reference cited on-page: Electrode manufacturer data; trade rule
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Welding Amperage Calculator (Stick) use?+
It computes I ≈ 30–40 A per mm of core wire, minus 10–15% out of position, per Electrode manufacturer data; trade rule. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
3.15 mm rods run 95–125 A; 4 mm, 120–160. Too cold: slag traps and porosity. Too hot: undercut and a flat, spattery bead. The rod packet's printed range trumps any rule.
Does this follow AWS/IS welding codes?+
Each tool implements the formula from the cited code or handbook (AWS D1.1, IS 800, ISO/EN). Qualified WPS values always govern over any calculator for code work.
Is the Welding Amperage Calculator (Stick) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
Related Engineering tools
Reynolds Number Calculator
Compute Re from density, velocity, pipe diameter and viscosity — with instant laminar/turbulent classification.
● LiveLaminar vs Turbulent Flow Classifier
Classify hydraulic-oil or process-fluid flow regime from kinematic viscosity, line velocity and tube bore.
● LiveBernoulli Equation Solver
Solve downstream pressure between two points from velocities, elevations and fluid density (ideal, lossless).
● Live