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Understanding Round Bar Weight Chart (kg, Mm, Pdf): A Key Tool In B2b Market India

Author: Shailesh Makwana

June 4, 2025

Round Bar

Round Bar


 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 mmAverage Weight
KG/MTRKG/FT
100.620.18
120.900.30
141.200.40
161.600.50
182.000.60
202.500.80
223.000.90
243.561.08
253.901.20
284.801.50
305.551.69
326.301.90
347.142.18
368.002.44
409.903.00
4512.493.81
5015.404.70
5619.345.89
6022.206.80
6324.477.46
63.524.867.58
6526.057.94
7030.209.20
7332.8610.00
7534.7210.58
7837.5111.43
8039.5012.00
8342.4712.95
8544.5513.58
9050.0015.20
9252.1915.91
9353.3916.27
9555.6516.95
10061.6618.79
10567.9820.72
11074.6022.74
11581.6424.88
12596.3429.36

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

Stainless Steel Round bar 303, 304, 316-grade weight chart

DiaWeightDiaWeight
(mm)per meter (kg)(in)per meter (kg)
3mm0.061/8″0.06
4mm0.103/16″0.14
5mm0.161/4″0.25
6mm0.225/16″0.39
7mm0.303/8″0.56
8mm0.407/16″0.77
10mm0.621/2″1.00
12mm0.899/16″1.22
14mm1.225/8″1.56
15mm1.4011/16″1.89
16mm1.593/4″2.25
18mm2.017/8″3.07
20mm2.481″4.03
22mm3.00
24mm3.57
25mm3.88

Round Bar 303S31 Smooth Turned

DiaWeightDiaWeight
(mm)per metre (kg)(in)per metre (kg)
25mm*3.881″4.03
30mm*5.581 1/8 “5.07
35mm7.601 1/4 “6.25
40mm*9.931 3/8″7.57
45mm12.561 1/2″9.01
60mm22.301 5/8″10.60
50mm*15.501 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 1/225.00
2 5/8″27.60
2 3/4″30.30
3″36.00

Round Bar 303S31 Rough Turned

DiaWeightDiaWeight
(in)per metre (kg)(in)per metre (kg)
3 1/4″42.904 3/4″91.70
3 1/2″49.805″102.00
3 3/4″57.105′ 1/2123.00
4″65.006″146.00
4 1/4″73.407″199.00
4 1/282.30

Round Bar 304S31 Bright Drawn IMA

Dia
(mm)
Weight per
metre (kg)
Dia
(in)
Weight per
metre (kg)
3mm0.061/8″0.06
4mm0.103/16″0.14
5mm0.161/4″0.25
6mm0.225/16″0.39
8mm0.403/8″0.56
10mm0.627/16″0.77
12mm0.891/21.00
15mm1.409/16″1.27
20mm2.485/8″1.56
25mm3.8811/16″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)
25mm3.881″4.03
30mm5.581 1/8″5.07
40mm9.931 1/4″6.25
50 mm15.501 3/8″7.57
60 mm22.301 1/2″9.01
1 5/8″10.60
1 3/412.20
2″16.00
2 1/4″20.30
2 1/225.00
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″36.006 1/2″172.00
3 1/4″42.907″199.00
31/2″49.807 1/2″229.00
3 3/4″57.108″260.00
4″65.008 1/2″294.00
4 1/4″73.409″329.00
4 1/2″82.3010″406.00
5″102.0011″492.00
5 1/4″111.9812″585.00
5 1/2″123.00340mm728.00
5 3/4″134.0016″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″36.006 1/2″172.00
3 1/4″42.907″199.00
31/2″49.807 1/2″229.00
3 3/4″57.108″260.00
4″65.008 1/2″294.00
4 1/4″73.409″329.00
4 1/2″82.3010″406.00
5″102.0011″492.00
5 1/4″111.9812″585.00
5 1/2″123.00340mm728.00
5 3/4″134.0016″1040.00
6″146.00

Round Bar 316S11/S31 Smooth Turned Bright Ground IMA

DiaWeightDiaWeight
(mm)per metre (Kg)(in)per metre (Kg)
25mm*3.917/8″3.09
30mm*5.631″*4.03
32mm6.401 1/8″*5.11
35mm*7.6611/4″ *6.30
40mm*10.001 3/8″*7.63
45mm12.701 1/2″*9.08
50mm15.601 5/8″*10.70
60mm*22.501 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″36.30185mm217.00
3 1/4″43.207 1/4″215.00
3 ½”50.207 /12″230.00
3 3/4″57.608″262.00
4″65.508 ½”296.00
4 1/4″73.90220mm307.00
4 1/2″82.909″332.00
4 3/4″92.409 1/2″370.00
5″102.0010″409.00
5 1/4″113.0010 1/2″451.00
5 1/2″123.0011495.00
5 3/4″135.0012590.00
6″147.00340mm734.00
6 1/4″160.0014802.00
6 1/2″173.00161049.00
7″201.00