Flat bar weight calculator

0.00785 × 50 × 5 = 1.96 kg/m. A 6 m bar weighs 11.77 kg.

0.00785 × 100 × 10 = 7.85 kg/m.

0.00785 × 30 × 3 ≈ 0.706 kg/m.

Enter width W, thickness T and length to get kg/m, kg/bar and paint area.

kg/m = 0.00785 × W × T

Enter dimensions in mm.

Material

Density (kg/m³)

Theoretical weight from nominal dimensions, excluding rolling tolerance and cutting loss.

Flat bar weight formula

Quantity	Formulas	Unit
Weight per metre	`0.00785 × W × T`	kg/m
Paint area	`2 × (W + T) / 1000`	m²/m

Width \ Thickness	3	4	5	6	8	10	12	16	20
20 mm	0.47	0.63	0.78	0.94	1.26	1.57	1.88	2.51	–
25 mm	0.59	0.78	0.98	1.18	1.57	1.96	2.35	3.14	3.92
30 mm	0.71	0.94	1.18	1.41	1.88	2.35	2.83	3.77	4.71
40 mm	0.94	1.26	1.57	1.88	2.51	3.14	3.77	5.02	6.28
50 mm	1.18	1.57	1.96	2.35	3.14	3.92	4.71	6.28	7.85
60 mm	1.41	1.88	2.35	2.83	3.77	4.71	5.65	7.54	9.42
80 mm	1.88	2.51	3.14	3.77	5.02	6.28	7.54	10.05	12.56
100 mm	2.35	3.14	3.92	4.71	6.28	7.85	9.42	12.56	15.7
120 mm	2.83	3.77	4.71	5.65	7.54	9.42	11.3	15.07	18.84
150 mm	3.53	4.71	5.89	7.06	9.42	11.78	14.13	18.84	23.55
200 mm	4.71	6.28	7.85	9.42	12.56	15.7	18.84	25.12	31.4

How much does 50 × 5 flat bar weigh per metre?

0.00785 × 50 × 5 = 1.96 kg/m. A 6 m bar weighs 11.77 kg.

How much does 100 × 10 flat bar weigh per metre?

0.00785 × 100 × 10 = 7.85 kg/m.

How much does 30 × 3 flat bar weigh per metre?

0.00785 × 30 × 3 ≈ 0.706 kg/m.