Calculators
Current, electrode and gas consumption, heat input, carbon equivalent — all worked out in the browser, nothing sent to a server.
The calculations that come up between fitting the joint and running the first bead. Each one works in your browser — nothing is sent anywhere and nothing is stored.
Under every calculator the formula is written out and the source of the coefficients is named: EN 1011-2, ISO/TR 18491, ISO 5817, EN ISO 6848 or consumable data sheets. That is deliberate. A result you can reproduce by hand is a result you can defend in front of an inspector; "the website said so" is not.
Where to start. Welding with covered electrodes: current by diameter and electrode consumption. Working in shielding gas: gas consumption, wire feed speed and heat input. Before a structural joint that matters: carbon equivalent and preheat temperature. Before quoting: cost per metre of weld. And if the arc feels soft at the end of a long extension, the machine is usually innocent — check the cable cross-section.
All of it is indicative. The final parameters are set by the welding procedure specification and the material certificate.
- Welding current by electrode diameter What current to set for a 2.5, 3.2 or 4 mm electrode, corrected for the welding position, the plate thickness and the coating type.
- Electrode consumption How many kilograms of electrodes a joint needs: groove cross-section, deposited metal, loss factor and the number of sticks.
- Cost per metre of weld What a metre of weld actually costs: deposited metal, wire and gas consumption, electricity, labour hours and the shop rate.
- Preheat temperature Whether to preheat and to what temperature: method B of EN 1011-2 with CET, combined thickness, hydrogen scale and heat input.
- Acceptance limits ISO 5817 Limits for undercut, porosity, excess weld metal and misalignment at quality levels B, C and D for a given wall thickness.
- Qualification range EN ISO 9606 Which thicknesses, diameters and positions the test you passed covers, how long the certificate is valid and when it must be confirmed.
- Wire feed speed Wire feed speed from the current, or current from the feed speed, for solid wire of 0.8 to 1.6 mm, with the deposition rate per hour.
- Duty cycle and fuse size How long the machine may weld before it trips on thermal overload, and what supply fuse or breaker its input current really needs.
- Tungsten electrode selection Which tungsten to use and at what diameter: current range by type and polarity, the colour code and the tip grind angle for the job.
- Shielding gas selection Which shielding gas mixture suits the material and the process: argon, CO2 and their blends for MIG/MAG, TIG and stainless steel.
- Fillet weld: throat and leg Converting throat thickness a into leg length z and back, with the deposited area and the mass of filler metal per metre of fillet.
- Welding unit converter Converts what welders actually meet: kJ/mm and kJ/cm, mm/min and m/min, bar and MPa, inches and millimetres, °C and °F.
- Shielding gas consumption How much gas a given flow rate uses and how long the cylinder lasts: volume from pressure, working time and the cost per weld.
- Steel weight calculator Mass of rolled metal by size: sheet, round and square bar, tube, angle and channel, for carbon steel, stainless and aluminium.
- Carbon equivalent CE Carbon equivalent from the composition on the mill certificate: IIW CE and CET, and what they say about weldability and preheat.
- Shade number DIN Which shade number to set on the helmet for MMA, MIG/MAG, TIG or cutting at a given current, following EN 169 and EN 379.
- Heat input Heat input from current, voltage and travel speed, with the thermal efficiency of the process taken from ISO/TR 18491 and EN 1011-1.
- Welding cable size Which cable cross-section a given current and cable length need, and how much voltage a long run costs you at the arc.
Frequently asked questions
Which calculator should I start with?
It depends on the process. With covered electrodes: current by diameter and electrode consumption. In shielding gas: gas consumption and wire feed speed. Before a joint that carries load: carbon equivalent and preheat. Before you quote: cost per metre of weld.
Is anything sent to a server?
No. Every calculation runs in the browser and nothing leaves it. That is also why the calculators keep working with no connection, provided the page has been opened once before.
Can I send a calculation to someone else?
Yes, with the share button. The values you entered go into the page address, so the link opens the calculator with the same numbers — useful for agreeing settings or a price in writing.