12" pipe weight and dimensions

53.57 lb/ft · 79.74 kg/m (Sch 40)

12" nominal pipe size (DN) has an outside diameter of 12.75 in (323.8 mm). Schedule 40 has a 0.406 in (10.31 mm) wall and weighs 53.57 lb per foot.

12" pipe weight calculator

Total weight
—

12" pipe schedules

ScheduleWall (in)Wall (mm)ID (in)ID (mm)lb/ftkg/m21 ft (lb)6 m (kg)
Schedule 5S 0.1563.96 12.438315.9 21.0031.26 441187.6
Schedule 10 0.1804.57 12.390314.7 24.1936.00 508216.0
Schedule 20 0.2506.35 12.250311.1 33.4149.72 702298.3
Schedule 30 0.3308.38 12.090307.0 43.8165.21 920391.3
Schedule 40S 0.3759.52 12.000304.8 49.6173.84 1,042443.0
Standard (STD) 0.3759.52 12.000304.8 49.6173.84 1,042443.0
Schedule 40 0.40610.31 11.938303.2 53.5779.74 1,125478.4
Schedule 80S 0.50012.70 11.750298.4 65.4897.45 1,375584.7
Extra strong (XS) 0.50012.70 11.750298.4 65.4897.45 1,375584.7
Schedule 60 0.56214.27 11.626295.3 73.22108.98 1,538653.9
Schedule 80 0.68717.45 11.376288.9 88.59131.86 1,860791.2
Schedule 100 0.84321.41 11.064281.0 107.30159.70 2,253958.2
Schedule 120 1.00025.40 10.750273.0 125.61186.95 2,6381,121.7
Schedule 140 1.12528.57 10.500266.7 139.81208.08 2,9361,248.5
Schedule 160 1.31233.32 10.126257.2 160.42238.77 3,3691,432.6

Schedules with an S suffix (5S, 10S, 40S, 80S) are stainless steel pipe per ASME B36.19M; weights shown are for carbon steel, so multiply by about 1.01 for stainless steel.

Weight filled with water and flow area

For supports and hangers, add the weight of the contents. Water weighs 62.4 lb/ft³ (1000 kg/m³).

ScheduleFlow area (in²)Flow area (cm²)Water (lb/ft)Pipe + water (lb/ft)Pipe + water (kg/m)
Schedule 5S121.50783.7 52.6773.67109.63
Schedule 10120.57777.6 52.2776.46113.76
Schedule 20117.86760.1 51.0984.50125.73
Schedule 30114.80740.4 49.7793.58139.25
Schedule 40S113.10729.5 49.0398.64146.79
Standard (STD)113.10729.5 49.0398.64146.79
Schedule 40111.93721.9 48.53102.10151.93
Schedule 80S108.43699.3 47.01112.49167.38
Extra strong (XS)108.43699.3 47.01112.49167.38
Schedule 60106.16684.7 46.02119.24177.45
Schedule 80101.64655.5 44.06132.65197.41
Schedule 10096.14620.1 41.68148.98221.71
Schedule 12090.76585.3 39.35164.96245.48
Schedule 14086.59558.5 37.54177.35263.93
Schedule 16080.53519.4 34.91195.33290.71

Wall thickness by schedule

Sch 5S 3.96 mm Sch 10 4.57 mm Sch 20 6.35 mm Sch 30 8.38 mm Sch 40S 9.52 mm STD 9.52 mm Sch 40 10.31 mm Sch 80S 12.7 mm XS 12.7 mm Sch 60 14.27 mm Sch 80 17.45 mm Sch 100 21.41 mm Sch 120 25.4 mm Sch 140 28.57 mm Sch 160 33.32 mm

Cross-section (Sch 40)

OD 323.8 mm (12.75 in)

Drawn to scale.

How the weight is calculated

Weight per foot = 10.69 × (OD − t) × t = 10.69 × (12.75 − 0.406) × 0.406 = 53.57 lb/ft.

The factor 10.69 is the density of carbon steel (0.2836 lb/in³) × π × 12 in/ft.

A large-diameter steel pipe with a cut pipe section on the ground
Photo: Fumikas Sagisavas, Wikimedia Commons, CC0.

Frequently asked questions

How much does 12" Schedule 40 pipe weigh?

12" Sch 40 pipe weighs 53.57 lb/ft (79.74 kg/m). A 21 ft random length weighs about 1,125 lb and a 6 m length about 478.4 kg.

What is the outside diameter of 12" pipe?

12.75 in (323.8 mm). The outside diameter is the same for every schedule; a higher schedule means a thicker wall and a smaller inside diameter.

How much does 12" Schedule 40 pipe weigh full of water?

102.10 lb/ft: 53.57 lb/ft of steel plus 48.53 lb/ft of water (151.93 kg/m in total). Use this for pipe support and hanger loads.

What is the inside diameter of 12" Schedule 40 pipe?

11.938 in (303.2 mm), from OD − 2 × wall = 12.75 − 2 × 0.406.

← 10" pipe · 14" pipe → · Full pipe schedule chart

Dimensions per ASME B36.10M-2015, adapted from Wikipedia, "Nominal Pipe Size" (CC BY-SA 4.0). Weights are plain-end carbon steel; verify with the mill certificate.