A round bar weight chart pdf provides a quick reference for calculating the weight of round bars based on their diameter and length. Typically, these charts use the formula:
Weight (kg/m) = (π/4) × Diameter² (mm) × Density of material (typically 7.85 for steel) × 0.001
However, rather than doing the math manually, a round bar weight chart lists standard diameters alongside their corresponding weights per meter, making life easier for anyone in the trade.
Round Bar Weight Chart in mm, Kg, Ft
Size in mm Average Weight KG/MTR KG/FT 10 0.62 0.18 12 0.90 0.30 14 1.20 0.40 16 1.60 0.50 18 2.00 0.60 20 2.50 0.80 22 3.00 0.90 24 3.56 1.08 25 3.90 1.20 28 4.80 1.50 30 5.55 1.69 32 6.30 1.90 34 7.14 2.18 36 8.00 2.44 40 9.90 3.00 45 12.49 3.81 50 15.40 4.70 56 19.34 5.89 60 22.20 6.80 63 24.47 7.46 63.5 24.86 7.58 65 26.05 7.94 70 30.20 9.20 73 32.86 10.00 75 34.72 10.58 78 37.51 11.43 80 39.50 12.00 83 42.47 12.95 85 44.55 13.58 90 50.00 15.20 92 52.19 15.91 93 53.39 16.27 95 55.65 16.95 100 61.66 18.79 105 67.98 20.72 110 74.60 22.74 115 81.64 24.88 125 96.34 29.36
Size in mm | Average Weight | |
KG/MTR | KG/FT | |
10 | 0.62 | 0.18 |
12 | 0.90 | 0.30 |
14 | 1.20 | 0.40 |
16 | 1.60 | 0.50 |
18 | 2.00 | 0.60 |
20 | 2.50 | 0.80 |
22 | 3.00 | 0.90 |
24 | 3.56 | 1.08 |
25 | 3.90 | 1.20 |
28 | 4.80 | 1.50 |
30 | 5.55 | 1.69 |
32 | 6.30 | 1.90 |
34 | 7.14 | 2.18 |
36 | 8.00 | 2.44 |
40 | 9.90 | 3.00 |
45 | 12.49 | 3.81 |
50 | 15.40 | 4.70 |
56 | 19.34 | 5.89 |
60 | 22.20 | 6.80 |
63 | 24.47 | 7.46 |
63.5 | 24.86 | 7.58 |
65 | 26.05 | 7.94 |
70 | 30.20 | 9.20 |
73 | 32.86 | 10.00 |
75 | 34.72 | 10.58 |
78 | 37.51 | 11.43 |
80 | 39.50 | 12.00 |
83 | 42.47 | 12.95 |
85 | 44.55 | 13.58 |
90 | 50.00 | 15.20 |
92 | 52.19 | 15.91 |
93 | 53.39 | 16.27 |
95 | 55.65 | 16.95 |
100 | 61.66 | 18.79 |
105 | 67.98 | 20.72 |
110 | 74.60 | 22.74 |
115 | 81.64 | 24.88 |
125 | 96.34 | 29.36 |
Rolling Tolerances
Size Ovality Weight Length up to 25 mm ± 0.5 mm 25 mm to 35 mm ± 0.6 mm 35 mm to 50 mm ± 0.8 mm 50 mm to 80 mm ± 1 mm 80 mm to 100 mm ± 1.3 mm 100 mm and above ± 1.6 % of the diameter. ± 75 % of total tolerance specified on the size. 10 mm to 16 mm ± 5 %
16 mm and above ± 3 % For fixed-length : ± 100 mm
Size | Ovality | Weight | Length |
up to 25 mm ± 0.5 mm 25 mm to 35 mm ± 0.6 mm 35 mm to 50 mm ± 0.8 mm 50 mm to 80 mm ± 1 mm 80 mm to 100 mm ± 1.3 mm 100 mm and above ± 1.6 % of the diameter. | ± 75 % of total tolerance specified on the size. | 10 mm to 16 mm ± 5 % 16 mm and above ± 3 % | For fixed-length : ± 100 mm |
Stainless Steel Round bar 303, 304, 316-grade weight chart
Dia Weight Dia Weight (mm) per meter (kg) (in) per meter (kg) 3mm 0.06 1/8″ 0.06 4mm 0.10 3/16″ 0.14 5mm 0.16 1/4″ 0.25 6mm 0.22 5/16″ 0.39 7mm 0.30 3/8″ 0.56 8mm 0.40 7/16″ 0.77 10mm 0.62 1/2″ 1.00 12mm 0.89 9/16″ 1.22 14mm 1.22 5/8″ 1.56 15mm 1.40 11/16″ 1.89 16mm 1.59 3/4″ 2.25 18mm 2.01 7/8″ 3.07 20mm 2.48 1″ 4.03 22mm 3.00 24mm 3.57 25mm 3.88
Dia | Weight | Dia | Weight |
(mm) | per meter (kg) | (in) | per meter (kg) |
3mm | 0.06 | 1/8″ | 0.06 |
4mm | 0.10 | 3/16″ | 0.14 |
5mm | 0.16 | 1/4″ | 0.25 |
6mm | 0.22 | 5/16″ | 0.39 |
7mm | 0.30 | 3/8″ | 0.56 |
8mm | 0.40 | 7/16″ | 0.77 |
10mm | 0.62 | 1/2″ | 1.00 |
12mm | 0.89 | 9/16″ | 1.22 |
14mm | 1.22 | 5/8″ | 1.56 |
15mm | 1.40 | 11/16″ | 1.89 |
16mm | 1.59 | 3/4″ | 2.25 |
18mm | 2.01 | 7/8″ | 3.07 |
20mm | 2.48 | 1″ | 4.03 |
22mm | 3.00 | ||
24mm | 3.57 | ||
25mm | 3.88 |
Round Bar 303S31 Smooth Turned
Dia Weight Dia Weight (mm) per metre (kg) (in) per metre (kg) 25mm* 3.88 1″ 4.03 30mm* 5.58 1 1/8 “ 5.07 35mm 7.60 1 1/4 “ 6.25 40mm* 9.93 1 3/8″ 7.57 45mm 12.56 1 1/2″ 9.01 60mm 22.30 1 5/8″ 10.60 50mm* 15.50 1 3/4″ 12.20 1 7/8″ 14.10 2″ 16.00 2 1/8″ 18.10 2 1/4″ 20.30 2 3/8″ 22.60 2 1/2 25.00 2 5/8″ 27.60 2 3/4″ 30.30 3″ 36.00
Dia | Weight | Dia | Weight |
(mm) | per metre (kg) | (in) | per metre (kg) |
25mm* | 3.88 | 1″ | 4.03 |
30mm* | 5.58 | 1 1/8 “ | 5.07 |
35mm | 7.60 | 1 1/4 “ | 6.25 |
40mm* | 9.93 | 1 3/8″ | 7.57 |
45mm | 12.56 | 1 1/2″ | 9.01 |
60mm | 22.30 | 1 5/8″ | 10.60 |
50mm* | 15.50 | 1 3/4″ | 12.20 |
1 7/8″ | 14.10 | ||
2″ | 16.00 | ||
2 1/8″ | 18.10 | ||
2 1/4″ | 20.30 | ||
2 3/8″ | 22.60 | ||
2 1/2 | 25.00 | ||
2 5/8″ | 27.60 | ||
2 3/4″ | 30.30 | ||
3″ | 36.00 |
Round Bar 303S31 Rough Turned
Dia Weight Dia Weight (in) per metre (kg) (in) per metre (kg) 3 1/4″ 42.90 4 3/4″ 91.70 3 1/2″ 49.80 5″ 102.00 3 3/4″ 57.10 5′ 1/2 123.00 4″ 65.00 6″ 146.00 4 1/4″ 73.40 7″ 199.00 4 1/2 82.30
Dia | Weight | Dia | Weight |
(in) | per metre (kg) | (in) | per metre (kg) |
3 1/4″ | 42.90 | 4 3/4″ | 91.70 |
3 1/2″ | 49.80 | 5″ | 102.00 |
3 3/4″ | 57.10 | 5′ 1/2 | 123.00 |
4″ | 65.00 | 6″ | 146.00 |
4 1/4″ | 73.40 | 7″ | 199.00 |
4 1/2 | 82.30 |
Round Bar 304S31 Bright Drawn IMA
Dia
(mm) Weight per
metre (kg) Dia
(in) Weight per
metre (kg) 3mm 0.06 1/8″ 0.06 4mm 0.10 3/16″ 0.14 5mm 0.16 1/4″ 0.25 6mm 0.22 5/16″ 0.39 8mm 0.40 3/8″ 0.56 10mm 0.62 7/16″ 0.77 12mm 0.89 1/2 1.00 15mm 1.40 9/16″ 1.27 20mm 2.48 5/8″ 1.56 25mm 3.88 11/16″ 1.89 3/4″ 2.25 7/8″ 3.07 1″ 4.03
Dia (mm) | Weight per metre (kg) | Dia (in) | Weight per metre (kg) |
3mm | 0.06 | 1/8″ | 0.06 |
4mm | 0.10 | 3/16″ | 0.14 |
5mm | 0.16 | 1/4″ | 0.25 |
6mm | 0.22 | 5/16″ | 0.39 |
8mm | 0.40 | 3/8″ | 0.56 |
10mm | 0.62 | 7/16″ | 0.77 |
12mm | 0.89 | 1/2 | 1.00 |
15mm | 1.40 | 9/16″ | 1.27 |
20mm | 2.48 | 5/8″ | 1.56 |
25mm | 3.88 | 11/16″ | 1.89 |
3/4″ | 2.25 | ||
7/8″ | 3.07 | ||
1″ | 4.03 |
Round Bar 304S31 Smooth Turned IMA
Dia
(mm) Weight per
metre (kg) Dia
(in) Weight per
metre (kg) 25mm 3.88 1″ 4.03 30mm 5.58 1 1/8″ 5.07 40mm 9.93 1 1/4″ 6.25 50 mm 15.50 1 3/8″ 7.57 60 mm 22.30 1 1/2″ 9.01 1 5/8″ 10.60 1 3/4 12.20 2″ 16.00 2 1/4″ 20.30 2 1/2 25.00 2 3/4″ 30.30 3″ 36.00
Dia (mm) | Weight per metre (kg) | Dia (in) | Weight per metre (kg) |
25mm | 3.88 | 1″ | 4.03 |
30mm | 5.58 | 1 1/8″ | 5.07 |
40mm | 9.93 | 1 1/4″ | 6.25 |
50 mm | 15.50 | 1 3/8″ | 7.57 |
60 mm | 22.30 | 1 1/2″ | 9.01 |
1 5/8″ | 10.60 | ||
1 3/4 | 12.20 | ||
2″ | 16.00 | ||
2 1/4″ | 20.30 | ||
2 1/2 | 25.00 | ||
2 3/4″ | 30.30 | ||
3″ | 36.00 |
Round Bar304S11/S31 Rough Turned
Dia (in) Weight per
metre (kg) Dia (in) Weight per
metre (kg) 3″ 36.00 6 1/2″ 172.00 3 1/4″ 42.90 7″ 199.00 31/2″ 49.80 7 1/2″ 229.00 3 3/4″ 57.10 8″ 260.00 4″ 65.00 8 1/2″ 294.00 4 1/4″ 73.40 9″ 329.00 4 1/2″ 82.30 10″ 406.00 5″ 102.00 11″ 492.00 5 1/4″ 111.98 12″ 585.00 5 1/2″ 123.00 340mm 728.00 5 3/4″ 134.00 16″ 1040.00 6″ 146.00
Dia (in) | Weight per metre (kg) | Dia (in) | Weight per metre (kg) |
3″ | 36.00 | 6 1/2″ | 172.00 |
3 1/4″ | 42.90 | 7″ | 199.00 |
31/2″ | 49.80 | 7 1/2″ | 229.00 |
3 3/4″ | 57.10 | 8″ | 260.00 |
4″ | 65.00 | 8 1/2″ | 294.00 |
4 1/4″ | 73.40 | 9″ | 329.00 |
4 1/2″ | 82.30 | 10″ | 406.00 |
5″ | 102.00 | 11″ | 492.00 |
5 1/4″ | 111.98 | 12″ | 585.00 |
5 1/2″ | 123.00 | 340mm | 728.00 |
5 3/4″ | 134.00 | 16″ | 1040.00 |
6″ | 146.00 |
Round bar type 316S11/S31 Bright Drawn IMA
Dia (in) Weight per
metre (kg) Dia (in) Weight per
metre (kg) 3″ 36.00 6 1/2″ 172.00 3 1/4″ 42.90 7″ 199.00 31/2″ 49.80 7 1/2″ 229.00 3 3/4″ 57.10 8″ 260.00 4″ 65.00 8 1/2″ 294.00 4 1/4″ 73.40 9″ 329.00 4 1/2″ 82.30 10″ 406.00 5″ 102.00 11″ 492.00 5 1/4″ 111.98 12″ 585.00 5 1/2″ 123.00 340mm 728.00 5 3/4″ 134.00 16″ 1040.00 6″ 146.00
Dia (in) | Weight per metre (kg) | Dia (in) | Weight per metre (kg) |
3″ | 36.00 | 6 1/2″ | 172.00 |
3 1/4″ | 42.90 | 7″ | 199.00 |
31/2″ | 49.80 | 7 1/2″ | 229.00 |
3 3/4″ | 57.10 | 8″ | 260.00 |
4″ | 65.00 | 8 1/2″ | 294.00 |
4 1/4″ | 73.40 | 9″ | 329.00 |
4 1/2″ | 82.30 | 10″ | 406.00 |
5″ | 102.00 | 11″ | 492.00 |
5 1/4″ | 111.98 | 12″ | 585.00 |
5 1/2″ | 123.00 | 340mm | 728.00 |
5 3/4″ | 134.00 | 16″ | 1040.00 |
6″ | 146.00 |
Round Bar 316S11/S31 Smooth Turned Bright Ground IMA
Dia Weight Dia Weight (mm) per metre (Kg) (in) per metre (Kg) 25mm* 3.91 7/8″ 3.09 30mm* 5.63 1″* 4.03 32mm 6.40 1 1/8″* 5.11 35mm* 7.66 11/4″ * 6.30 40mm* 10.00 1 3/8″* 7.63 45mm 12.70 1 1/2″* 9.08 50mm 15.60 1 5/8″* 10.70 60mm* 22.50 1 3/4″* 12.40 1 7/8* 14.20 2″* 16.10 2 1/8″* 18.20 2 1/4″ * 20.40 2 3/8″* 22.80 2 1/2″* 25.20 2 5/8″ 27.80 2 3/4″* 30.50 3″* 36.30
Dia | Weight | Dia | Weight |
(mm) | per metre (Kg) | (in) | per metre (Kg) |
25mm* | 3.91 | 7/8″ | 3.09 |
30mm* | 5.63 | 1″* | 4.03 |
32mm | 6.40 | 1 1/8″* | 5.11 |
35mm* | 7.66 | 11/4″ * | 6.30 |
40mm* | 10.00 | 1 3/8″* | 7.63 |
45mm | 12.70 | 1 1/2″* | 9.08 |
50mm | 15.60 | 1 5/8″* | 10.70 |
60mm* | 22.50 | 1 3/4″* | 12.40 |
1 7/8* | 14.20 | ||
2″* | 16.10 | ||
2 1/8″* | 18.20 | ||
2 1/4″ * | 20.40 | ||
2 3/8″* | 22.80 | ||
2 1/2″* | 25.20 | ||
2 5/8″ | 27.80 | ||
2 3/4″* | 30.50 | ||
3″* | 36.30 |
Round bar 316S11/S31 Rough Turned
Dia (in) Weight per metre (kg) Dia (in) Weight per metre (kg) 3″ 36.30 185mm 217.00 3 1/4″ 43.20 7 1/4″ 215.00 3 ½” 50.20 7 /12″ 230.00 3 3/4″ 57.60 8″ 262.00 4″ 65.50 8 ½” 296.00 4 1/4″ 73.90 220mm 307.00 4 1/2″ 82.90 9″ 332.00 4 3/4″ 92.40 9 1/2″ 370.00 5″ 102.00 10″ 409.00 5 1/4″ 113.00 10 1/2″ 451.00 5 1/2″ 123.00 11 495.00 5 3/4″ 135.00 12 590.00 6″ 147.00 340mm 734.00 6 1/4″ 160.00 14 802.00 6 1/2″ 173.00 16 1049.00 7″ 201.00
Dia (in) | Weight per metre (kg) | Dia (in) | Weight per metre (kg) |
3″ | 36.30 | 185mm | 217.00 |
3 1/4″ | 43.20 | 7 1/4″ | 215.00 |
3 ½” | 50.20 | 7 /12″ | 230.00 |
3 3/4″ | 57.60 | 8″ | 262.00 |
4″ | 65.50 | 8 ½” | 296.00 |
4 1/4″ | 73.90 | 220mm | 307.00 |
4 1/2″ | 82.90 | 9″ | 332.00 |
4 3/4″ | 92.40 | 9 1/2″ | 370.00 |
5″ | 102.00 | 10″ | 409.00 |
5 1/4″ | 113.00 | 10 1/2″ | 451.00 |
5 1/2″ | 123.00 | 11 | 495.00 |
5 3/4″ | 135.00 | 12 | 590.00 |
6″ | 147.00 | 340mm | 734.00 |
6 1/4″ | 160.00 | 14 | 802.00 |
6 1/2″ | 173.00 | 16 | 1049.00 |
7″ | 201.00 |