What is the formula for angle bar weight?

For an L-section angle: Weight (kg) = (Leg A + Leg B − Thickness) × Thickness × Length × Density. All dimensions are converted to meters first. This formula accounts for the material at the corner shared by both legs, which must be subtracted once to avoid double-counting.

What is an equal angle vs an unequal angle?

An equal angle has both legs the same length (e.g., 50 × 50 × 5 mm). An unequal angle has legs of different lengths (e.g., 75 × 50 × 6 mm). Both are L-shaped cross-sections; only the leg proportions differ.

What density does this tool use for SS 304?

Grade 304 (the most common austenitic stainless) is assigned a density of 7930 kg/m³ (0.286 lb/in³), per ASTM and EN material specifications. Each grade in the dropdown uses its own certified density.

Can I calculate weight for multiple pieces?

Yes. Enter the number of pieces in the Quantity field and the calculator multiplies the per-piece weight by that number, showing both total and per-piece weights.

Does this tool support imperial units?

Yes. Leg lengths and thickness can be entered in mm, cm, or inches. Bar length can be in meters, mm, feet, or inches. All values are converted to meters internally before the density formula is applied.

How accurate are the results?

Results are theoretical weights based on nominal dimensions and standard grade densities. Actual mill weights may vary by ±3–5% due to manufacturing tolerances per ASTM A276 / EN 10088.

What is the density difference between 304 and 316?

316 has a density of 8000 kg/m³ vs 7930 kg/m³ for 304 — roughly a 0.9% difference. For most structural estimates this is small, but this calculator applies the correct per-grade value for precision.

Stainless Steel Angle Weight Calculator

Name: Stainless Steel Angle Weight Calculator
Availability: InStock
Author: Nham Vu

Enter leg lengths, thickness, and bar length to get the weight of a stainless steel equal or unequal angle section in kg and lbs.

Angle Dimensions

Angle Type

Equal angle (L × L × t) Unequal angle (A × B × t)

Leg A (both legs)

Thickness (t)

Length

Stainless Steel Grade

Quantity (pieces)

Formula Reference

Weight = (A + B − t) × t × L × ρ

A = Leg A (m), B = Leg B (m), t = thickness (m), L = length (m), ρ = grade density (kg/m³). For equal angles, A = B. The corner overlap (t × t) is subtracted once.

Enter angle dimensions on the left and click Calculate.

Stainless Steel Grade Densities

Grade	Type	kg/m³	lb/in³
304 / 304L	Austenitic	7930	0.286
316	Austenitic	8000	0.289
316L	Austenitic (LC)	7980	0.288
321	Ti-stabilized	7900	0.285
430	Ferritic	7700	0.278
410	Martensitic	7650	0.276
2205 Duplex	Duplex	7805	0.282
2507 S. Duplex	Super Duplex	7800	0.282

Copied!

Summary

Enter leg lengths, thickness, and bar length to get the weight of a stainless steel equal or unequal angle section in kg and lbs.

How it works

Select Equal or Unequal angle type — for equal angles, only one leg length is needed.
Enter Leg A length (and Leg B for unequal angles) in mm, cm, or inches.
Enter the angle thickness in the same or a different unit.
Enter the bar length in meters, millimeters, feet, or inches.
Select the stainless steel grade — the correct density is applied automatically.
Optionally set a quantity, then click Calculate Weight to see results in kg and lbs.

Use cases

Estimating stainless steel angle bar weight for fabrication and procurement.
Calculating freight costs for angle section orders.
Verifying weight against supplier mill certificates for quality assurance.
Comparing grade choices (304 vs 316) by weight for structural design.
Preparing bills of materials for food-grade equipment frames.
Checking structural load for stainless steel shelf brackets and supports.
Sizing angles for marine or chemical-plant handrails and grating frames.
Quick on-site estimation without manual lookup tables.

Frequently Asked Questions

Last updated: 2026-07-16 · Reviewed by Nham Vu