Pipe Dimensions & Weight Chart

Outside diameter, wall thickness and weight per metre (kg/m) for Schedule 40 and Schedule 80 carbon steel pipe, by NPS and DN, from 1/2" to 24".

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/ Overview

Pipe weight per metre

Pipe weight per metre depends on OD, wall thickness and material density. The chart below gives kg/m for carbon steel (7850 kg/m³) in the two most-used schedules. For stainless multiply by ~1.02, for duplex ~0.99; for any grade, size or schedule use our pipe weight calculator.

/ Weight chart

OD, wall & weight (SCH 40 / SCH 80)

NPS	DN	OD (mm)	SCH 40 wall	SCH 40 kg/m	SCH 80 wall	SCH 80 kg/m
1/2″	DN15	21.3	2.77	1.27	3.73	1.62
3/4″	DN20	26.7	2.87	1.69	3.91	2.2
1″	DN25	33.4	3.38	2.5	4.55	3.24
1 1/4″	DN32	42.2	3.56	3.39	4.85	4.47
1 1/2″	DN40	48.3	3.68	4.05	5.08	5.41
2″	DN50	60.3	3.91	5.44	5.54	7.48
2 1/2″	DN65	73.0	5.16	8.63	7.01	11.41
3″	DN80	88.9	5.49	11.29	7.62	15.27
4″	DN100	114.3	6.02	16.08	8.56	22.32
5″	DN125	141.3	6.55	21.77	9.53	30.97
6″	DN150	168.3	7.11	28.26	10.97	42.56
8″	DN200	219.1	8.18	42.55	12.7	64.64
10″	DN250	273.0	9.27	60.29	15.09	95.98
12″	DN300	323.8	10.31	79.71	17.48	132.05
14″	DN350	355.6	11.13	94.55	19.05	158.11
16″	DN400	406.4	12.7	123.31	21.44	203.54
18″	DN450	457.0	14.27	155.81	23.83	254.57
20″	DN500	508.0	15.09	183.43	26.19	311.19
22″	DN550	559.0	—	—	—	—
24″	DN600	610.0	17.48	255.43	30.96	442.11

Weights kg/m for carbon steel (density 7850 kg/m³), W = (OD − wall) × wall × π × ρ ÷ 1,000,000. Stainless ≈ +2%, duplex ≈ −1%.

/ FAQ

Common questions

How do you calculate pipe weight per metre?

Weight (kg/m) = (OD − wall) × wall × π × density ÷ 1,000,000, with OD and wall in mm. For carbon steel density is 7850 kg/m³; multiply by the density ratio for other materials.

What is the weight of 4 inch Schedule 40 pipe?

A 4 inch (NPS 4, OD 114.3 mm) SCH 40 carbon steel pipe has a 6.02 mm wall and weighs about 16.08 kg per metre.

What is the weight of 2 inch Schedule 40 pipe?

A 2 inch (NPS 2, OD 60.3 mm) SCH 40 carbon steel pipe weighs about 5.44 kg per metre (3.91 mm wall).

Does stainless steel pipe weigh more than carbon steel?

Slightly — stainless is about 2% denser (≈8000 vs 7850 kg/m³), so a same-size stainless pipe weighs ~2% more. Duplex is marginally lighter than carbon steel.

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