Calculation formula and STANDARD round steel weight table

Round steel weight is an important parameter that must be carefully calculated during construction. The weight of round steel depends on the diameter, thickness, and chemical composition of the steel. We can use the round steel weight table to calculate more accurately.

What is round steel? What types are there?

Round steel is a type of steel with a circular cross-section, an oblong shape, and many sizes; usually, the length of a bar is 6m. Round steel is produced by hot rolling or cold rolling.

Currently, round steel is divided into round bar steel and hollow steel pipe. In particular, round bar steel includes plain round steel, rebar, and round bar steel. Each type will have its characteristics. Specifically:

Round bar steel

• Round bar: steel with a smooth surface, with a diameter of 14mm to more than 200mm and a length of about 6–8.6 m or according to customer requirements. Round bar steel bars are easy to weld and cut and have good load-bearing capacity.
• Rebar: steel with a V-shaped ribbed surface, a diameter of 10mm to 55mm, and a standard length of 11.7m. Rebar steel has good torsional and anti-slip properties and can withstand large loads.
• Round steel coil: This steel is also known as wire steel or construction steel coil. It has a diameter of 6mm to 10mm and a roll length of 10m to 100m.

Hollow steel pipe steel

It is a hollow steel pipe with thin walls and good hardness and resistance. Pipes are often painted, polished, or plated to prevent oxidation from the environment. Hollow steel pipe usually has a diameter of 14mm to 200mm and a thickness of 2mm to 10mm.

Formula to calculate round steel weight

Because round steel is divided into two types, the weight calculation formula for each type is also different. Specifically:

The formula for calculating the weight of round bar steel

M= (7850 * L * 3.14 * d²)/4

In there:

• M: Weight of round bar steel in kg
• 7850: Density of steel calculated in (kg/m³)
• L: Length of steel
• d: Is the steel diameter converted into meters?

Formula to calculate weight of hollow steel pipe

M = 0.003141 * T(mm) * [O.D(mm) – T(mm)] * 7.85 * L(mm)

In there:

• M: Weight of round steel pipe in kg
• T: Thickness of steel
• L: Length of steel
• D: Outside diameter of steel pipe

Round bar steel weight table

Knowing how to use the weight table helps engineers and contractors calculate the weight of round bar steel quickly and accurately. This lookup table is also divided into each type of round steel:

Table to look up the weight of round bar steel

No.	Specifications	Mass (Kg/m)		No	Specifications	Mass (Kg/m)
Round bar
1	Round bar  Ø6	0.22	Round bar	46	Round bar Ø155	148.12
2	Round bar  Ø8	0.39	Round bar	47	Round bar Ø160	157.83
3	Round bar Ø10	0.62	Round bar	48	Round bar Ø170	178.18
4	Round bar Ø12	0.89	Round bar	49	Round bar Ø180	199.76
5	Round bar Ø14	1.21	Round bar	50	Round bar Ø190	222.57
6	Round bar Ø16	1.58	Round bar	51	Round bar Ø200	246.62
7	Round bar Ø18	2.00	Round bar	52	Round bar Ø210	271.89
8	Round bar Ø20	2.47	Round bar	53	Round bar Ø220	298.40
9	Round bar Ø22	2.98	Round bar	54	Round bar Ø230	326.15
10	Round bar Ø24	3.55	Round bar	55	Round bar Ø240	355.13
11	Round bar Ø25	3.85	Round bar	56	Round bar Ø250	385.34
12	Round bar Ø26	4.17	Round bar	57	Round bar Ø260	416.78
13	Round bar Ø28	4.83	Round bar	58	Round bar Ø270	449.46
14	Round bar Ø30	5.55	Round bar	59	Round bar Ø280	483.37
15	Round bar Ø32	6.31	Round bar	60	Round bar Ø290	518.51
16	Round bar Ø34	7.13	Round bar	61	Round bar Ø300	554.89
17	Round bar Ø35	7.55	Round bar	62	Round bar Ø310	592.49
18	Round bar Ø36	7.99	Round bar	63	Round bar Ø320	631.34
19	Round bar Ø38	8.90	Round bar	64	Round bar Ø330	671.41
20	Round bar Ø40	9.86	Round bar	65	Round bar Ø340	712.72
21	Round bar Ø42	10.88	Round bar	66	Round bar Ø350	755.26
22	Round bar Ø44	11.94	Round bar	67	Round bar Ø360	799.03
23	Round bar Ø45	12.48	Round bar	68	Round bar Ø370	844.04
24	Round bar Ø46	13.05	Round bar	69	Round bar Ø380	890.28
25	Round bar Ø48	14.21	Round bar	70	Round bar Ø390	937.76
26	Round bar Ø50	15.41	Round bar	71	Round bar Ø400	986.46
27	Round bar Ø52	16.67	Round bar	72	Round bar Ø410	1,036.40
28	Round bar Ø55	18.65	Round bar	73	Round bar Ø420	1,087.57
29	Round bar Ø60	22.20	Round bar	74	Round bar Ø430	1,139.98
30	Round bar Ø65	26.05	Round bar	75	Round bar Ø450	1,248.49
31	Round bar Ø70	30.21	Round bar	76	Round bar Ø455	1,276.39
32	Round bar Ø75	34.68	Round bar	77	Round bar Ø480	1,420.51
33	Round bar Ø80	39.46	Round bar	78	Round bar Ø500	1,541.35
34	Round bar Ø85	44.54	Round bar	79	Round bar Ø520	1,667.12
35	Round bar Ø90	49.94	Round bar	80	Round bar Ø550	1,865.03
36	Round bar Ø95	55.64	Round bar	81	Round bar Ø580	2,074.04
37	Round bar Ø100	61.65	Round bar	82	Round bar Ø600	2,219.54
38	Round bar Ø110	74.60	Round bar	83	Round bar Ø635	2,486.04
39	Round bar Ø120	88.78	Round bar	84	Round bar Ø645	2,564.96
40	Round bar Ø125	96.33	Round bar	85	Round bar Ø680	2,850.88
41	Round bar Ø130	104.20	Round bar	86	Round bar Ø700	3,021.04
42	Round bar Ø135	112.36	Round bar	87	Round bar Ø750	3,468.03
43	Round bar Ø140	120.84	Round bar	88	Round bar Ø800	3,945.85
44	Round bar Ø145	129.63	Round bar	89	Round bar Ø900	4,993.97
45	Round bar Ø150	138.72	Round bar	90	Round bar Ø1000	6,165.39

Table to look up the weight of hollow steel pipe

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