Free Welding Calculators & Reference
Welding Calculators & Reference
Free welding calculators and reference tools for AWS D1.1:2025 and A2.4. Preheat, heat input, fillet size, carbon equivalent — plus symbol charts, compliance guides, and Q&A for fabricators and inspectors.
Use this hub to choose the right welding calculator, code guide, symbol reference, or inspection explainer before jumping into a specific task. It is organized by workflow: calculations, WPS and PQR references, inspection topics, drawing symbols, temperature controls, and practical welding questions.
Common source anchors on this hub include Table 5.11 for structural-steel preheat, Table 7.7 for minimum fillet weld size, and Clause 6 for procedure qualification context.
Calculators
°F
Preheat Calculator
D1.1:2025 Table 5.11 lookup. Select steel, process, and thickness — get minimum preheat and interpass temperature.
kJ
Heat Input Calculator
Calculate heat input in kJ/in and kJ/mm from voltage, amperage, and travel speed.
△
Fillet Weld Size
D1.1 Table 7.7 minimum fillet weld size lookup by material thickness.
lb
Deposition Rate
Calculate weld metal deposition rate in lbs/hr and kg/hr from wire feed speed and electrode diameter.
CE
Carbon Equivalent
Calculate CE(IIW) and Pcm from steel chemistry to assess weldability and hardenability.
D1.1 Reference
WS
WPS Guide
What goes into a WPS under D1.1. Prequalified vs qualified, Table 5.5 essential variables, format requirements.
QMS
Welding Management Software
How to connect WPS, PQR, WPQ, weld maps, NDE, MTRs, repairs, revisions, and audit-ready turnover records.
WP
How to Fill Out a WPS Form
Field-by-field walkthrough of the D1.1 Annex J form. Table 5.5 variables, tolerances, common mistakes.
PW
Prequalified WPS
Clause 5 requirements for prequalification: approved processes, Table 5.6 steels, Figure 5.1 joints.
CW
Code Minimum vs WPS
Hierarchy when a customer says D1.1 prohibits what your WPS allows. §1.5 Engineer authority, §1.7 shall/should/may, §5.2 WPS variables.
EOR
EOR Weld Specification Drawings
What belongs in contract documents vs contractor WPS details under D1.1 Clauses 1.5 and 5.2.
DR
Drawing Review
Upload welding drawings and check symbols, prequalification, and drawing-level compliance cues before WPS or inspection review.
T
Weld Group Torsion
Double fillet weld group torsion: force-couple spacing, eccentricity, and D1.1 Clause 4.7 boundaries.
FAT
D1.1 Fatigue Categories
Table 4.5 fatigue stress categories, threshold ranges, and the difference from preheat categories.
GAS
ER80 vs ER90 (Shielding Gas)
When a shielding gas change silently breaks an ER90 assumption. A5.28 §3.2 exception + D1.1:2025 Clause 5.6.4 prequalified gas rules.
GMAW
GMAW Shielding Gas
D1.1:2025 Clause 5.6.4 gas substitution paths, Table 5.10 ranges, OE formula, and flow-rate tolerance.
FLG
Welding Across I-Beam Flanges
D1.1 Table 4.5 fatigue categories for transverse welds across beam flanges, plus D1.5 FCM context.
PQ
PQR — Procedure Qualification
When a PQR is required under D1.1. Table 6.6 essential variables and the prequalified exception.
CF
CJP Groove Qualifies Fillet WPS
D1.1:2025 Clause 6.11.1(3) one-way inheritance — CJP groove test qualifies fillet welds regardless of size or thickness.
SW
Standard WPS
How standard welding procedure specifications differ from shop-specific WPS documents and qualification records.
D1
AWS D1.1:2025 Overview
What D1.1 covers, 11-clause overview, prequalified vs qualified WPS paths.
CJ
CJP Weld Guide
Complete joint penetration welds: prequalified joints per Figure 5.1, backing requirements, CJP vs PJP.
MT
Mill Test Report (MTR)
How to read an MTR for D1.1 compliance: ASTM spec to Table 5.6 group to preheat lookup.
MC
Mill Test Certificate
What an MTC proves, how it differs from an MTR, and where the certificate fits in material traceability.
T°
Interpass Temperature
D1.1 minimum equals preheat, maximum when CVN or material requirements apply.
HT
Post-Weld Heat Treatment
D1.1 Section 7.8 PWHT requirements: when it applies, temperature ranges, and hold times.
80
Welding Standards Hub
All 80 welding codes covered by Flux: D1.x, ASME IX, API 1104, CSA W59, EN 1011-2, AS/NZS 1554.
PATH
CWI Exam Study Path
Free study path organizing calculators, Q&A, and symbol pages into six high-yield CWI topics — preheat, filler metal, symbols, joints, positions, heat input.
15Q
CWI Readiness Check
15-question diagnostic across 5 BoK topics. ~4 minutes. Per-topic weakness report emailed.
CWI
CWI Practice Questions
Practice question set for inspection vocabulary, symbol reading, procedure qualification, and code navigation.
BT
Fillet Weld Break Test
Inspection guide for fillet weld break testing, fracture surfaces, and common test-read issues.
LOG
Welder Continuity Log
Track qualification continuity, process coverage, and documentation gaps before a continuity lapse creates requalification work.
Inspection
CW
Certified Welding Inspector
AWS B5.1 CWI requirements: education, experience, exam format, and renewal.
vs
CWI vs ASNT Level 2
D1.1 Clause 8.1.4.2 vs 8.14.6: which inspector certification for welding vs NDT?
VT
Visual Weld Inspection
D1.1 Clause 8 VT acceptance criteria, inspection sequence, and reject/accept decisions.
8.1
Weld Defects
Table 8.1 discontinuity categories, the VT/RT/UT inspection sequence, and when repair is required.
ND
NDE Requirements
When RT, UT, MT, and PT are required under D1.1 Clause 8. Tables 8.1-8.3 decision guide.
8.2
D1.1 RT Acceptance
Figure 8.2 workflow for RT discontinuity size, spacing, and cyclic-tension CWI questions.
UT
Ultrasonic Testing
D1.1 UT acceptance criteria, Class A through D indications, and scanning requirements.
UC
Weld Undercut
Table 8.1 undercut limits for static and cyclic connections with causes and repair guidance.
PP
Weld Porosity
Table 8.1 porosity acceptance criteria — when porosity passes and when it fails visual inspection.
BT
Burn-Through
What burn-through means in weld inspection and why it changes repair and acceptance decisions.
IF
Incomplete Fusion
How incomplete fusion appears, why it matters structurally, and how inspection methods identify it.
CR
Weld Cracks
Crack types, likely causes, and why cracks are treated differently from many other discontinuities.
DC
Weld Discontinuity
Difference between a discontinuity, a defect, and a rejectable condition in weld inspection language.
IN
Weld Inclusion
Slag, tungsten, and other inclusion types with inspection context and prevention notes.
PC
Porosity Causes
Shielding, moisture, contamination, and technique issues that commonly produce weld porosity.
PR
Weld Profile Requirements
Profile language for convexity, concavity, underfill, overlap, and other shape-related inspection calls.
SP
Weld Spatter
What spatter indicates about parameters, shielding, surface condition, and cleanup expectations.
TM
Welding Transfer Modes
Short circuit, globular, spray, and pulsed transfer modes with practical inspection implications.
Symbol Reference
◻
Weld Symbol Chart
Complete AWS A2.4 reference — every weld type, symbol anatomy, arrow side/other side, finishing codes.
◻
Fillet Weld Symbol
Leg size, throat, equal and unequal legs, intermittent fillet welds.
↓
Printable PDF Chart
Print-optimized weld symbol reference sheet. All types, anatomy, finishing codes on one page.
G
What Does G Mean?
Grinding and finishing symbols per AWS A2.4 — G, M, C, H, P, R, U designators explained.
Preheat & Temperature
T°
Maximum Interpass Temperature
D1.1 has no general max. Only A514, HPS70W, HPS100W have 400–450°F limits.
❄
Cold Weather Welding
Below 32°F: preheat to 70°F. Below 0°F: welding prohibited. Wind shelter 5 mph.
5.11
Table 3.2/5.11 Explained
Table 3.2 is now Table 5.11. Seven preheat categories A through G by process and hydrogen level.
A+B
Dissimilar Metal Welding WPS
Use the highest preheat of either steel (§5.7.2). Filler metal options and WPS writing guide.
Q&A
?
Q&A Hub
D1.1:2025 welding questions with specific table and clause citations.
A36
A36 Preheat Temperature
Table 5.11 preheat requirements for A36 steel by process category and thickness.
70
E7018 vs E6013
Electrode comparison from a D1.1 compliance perspective — preheat, storage, qualification.
△
Minimum Fillet Weld Size
Table 7.7 explained — which thickness governs and how electrode choice changes the answer.
CE
Carbon Equivalent Explained
D1.1 Annex B CE(IIW) formula with (Mn+Si)/6, Pcm, and what your result means for preheat.
FAQ
What can I do from the welding hub?
The welding hub collects calculators, reference guides, symbol pages, inspection topics, and question pages so users can move from a broad task to the specific page that fits their job.
Are the calculators and reference pages separate?
Yes. Calculator pages support specific lookups, while reference pages explain the surrounding topic, terminology, and workflow context. Many pages link between the two so users can move from explanation to action.
Where should a new user start?
Start with the page family that matches the immediate task: calculators for numeric lookups, standards for governing-code selection (e.g., AWS D1.1 for carbon-steel structural welds), symbols for drawing interpretation, and inspection pages for discontinuity or NDE questions.