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# Pipe Weight Calculator

### Weight of Empty Pipe

Weight of empty pipe per unit length can be calculated as

wp = ρm Am

= ρm π (do2 - di2) / 4

= (π / 4) ρm (do2 - di2)                               (1)

where

wpweight of empty pipe per unit length (kg/m, lb/in)

ρm = density of pipe material (kg/m3, lb/in3)

Am = cross-sectional wall area of pipe (m2, in2)

do = outside diameter (m, in)

di = do - 2 t = inside diameter (m, in)

t = wall thickness (m, in)

### Weight of Liquid in Pipe

Weight of liquid in pipes per unit length can be calculated as

wl = ρl Ai

= ρl π (di / 2)2

= (π / 4) ρl di2                                    (2)

where

wl = weight of liquid in pipe per unit length of pipe (kg, lb)

Ai = cross-sectional inside area of pipe (m2, in2)

ρl = density of liquid (kg/m3, lb/in3)

.

### Weight of Pipe with Liquid

Weight of pipe with liquid can be calculated as

w = wp + wi

= ρm Am + ρl Ai

=  (ρm π (do2 - di2) / 4) + (ρl π di2 / 4)

= (π / 4) [ρm (do2 - di2) + ρl di2]                      (3)

#### Weight of Pipe Calculator

This calculator can be used to calculate the weight of a pipe with - or without - liquid. The calculator is generic and can be used for both SI and Imperial units as long as the use of units are consistent.

• 1 m = 103 mm
• 1 m2 = 106 mm2
• 1 in = 1/12 ft
• 1 in2 = 1/144 ft2
• 1 lb/in3 = 1728 lb/ft2

### Example - Weight of 4" Schedule 40 Steel Pipe with Water - SI Units (default values in the calculator above)

The outside diameter  of 4" Schedule 40 Steel Pipe is 114.3 mm. The inside diameter is 102.3 mm. The density of steel is 7850 kg/m3. The density of water is 1000 kg/m3.

The weight of empty pipe per unit length can be calculatet with (1) as:

wp = (π / 4) (7850 kg/m3) ((0.1143 m)2 - (0.1023 m)2)

= 16 kg/m

The weight of the liquid in the pipe per unit length can be calculatet with (2) as:

wl = (π / 4) (1000 kg/m3) (0.1023 m)2

= 8.2 kg/m

The weight of pipe filled with water per unit length can be calculated with (3) as

w = (π / 4) [(7850 kg/m3)((0.1143 m)2 - (0.1023 m)2) + (1000 kg/m3) (0.1023 m)2

= 24.2 kg/m

### Example - Weight of 4" Schedule 40 Steel Pipe

The outside diameter  of 4" Schedule 40 Steel Pipe is 4.500 inches. The wall thickness is 0.237 inches and the inside diameter is 4.026 in. The density of steel is 490 lb/ft3 (0.28 lb/in3). The weight of empty pipe per unit length can be calculated as

w = (π / 4) (0.28 lb/in3) ((4.500 in)2 - (4.026 in)2)

= 0.89 lb/in

= 10.7 lb/ft

.

### Typical Weight of Schedule 40 Steel Pipe with/without Water

Typical Weight of Schedule 40 Steel Pipe with/without Water
Nominal Pipe SizeWeight of PipeWeight of Pipe filled with Water
(in)(mm)(lbs/ft)(kg/m)(lbs/ft)(kg/m)
3/8 10 0.6 0.9 0.7 1.0
1/2 15 0.8 1.2 0.9 1.2
3/4 20 1.1 1.7 1.3 2.0
1 25 1.7 2.5 2.1 3.0
1 1/4 32 2.3 3.4 2.9 4.3
1 1/2 40 2.7 4.0 3.6 5.3
2 50 3.6 5.4 5.0 7.5
2 1/2 65 5.8 8.6 7.9 11.7
3 80 7.6 11.2 10.8 15.9
3 1/2 90 9.1 13.5 13.4 19.8
4 100 10.8 16.0 16.3 24.2
5 125 14.6 21.7 23.2 34.6
6 150 19.0 28.2 31.5 46.8
8 200 28.5 42.5 50.1 74.6
10 250 40.5 60.2 74.6 111
12 300 51.1 75.9 102 152
14 350 63.0 93.7 122 181
16 400 83.0 124 160 237
18 450 105 156 202 301
20 500 123 183 243 362
24 600 171 255 345 514

.

### Weight of Insulation on Pipe

Weight of stone wool insulation mat on pipes.

Weight of Stone Wool Insulation Mat on Pipes
Nominal DiameterOutside Diameter
(mm)
Insulation Weight (kg/m pipe)
Insulation Thichness (mm)
(mm)(in)3040506080100120140
15 ½ 21.3 4 5 6 8 11 15 19 24
25 1 33.7 4 5 7 8 12 15 20 25
50 2 60.3 5 7 8 10 13 17 22 27
65 76.1 6 7 9 10 14 18 23 28
80 3 88.9 7 8 10 11 15 19 24 29
100 4 114.3 8 9 11 12 16 21 26 31
200 8 219.1 12 14 16 18 23 28 33 39
300 12 323.9 17 19 21 24 29 35 41 47
500 20 508.0 25 28 31 34 40 47 54 62
700 28 711.0 34 37 41 44 52 60 69 78

## Related Topics

### • Dimensions of Pipes and Tubes

Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights and more.

## Related Documents

### ANSI Schedule 40 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.

### ASTM D1785 and ASTM F441 - PVC and CPVC Pipes Schedule 40 & 80

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### Cement Lined Carbon Steel Pipes

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### Ice Loaded Pipelines

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### Metals and Alloys - Densities

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### NPS - 'Nominal Pipe Size' and DN - 'Diametre Nominal'

The size of pipes, fittings, flanges and valves are often given in inches as NPS - Nominal Pipe Size, or in metric units as DN - 'Diametre Nominal'.

### Pipes - Nominal Wall Thickness

Nominal wall thickness of seamless and welded carbon and alloy steel pipes

### Pipes with Water Content - Weight and Volume

Estimate water content in pipes - weight and volume.

### Piping Equations

Calculate cross-sectional areas, weight of empty pipes, weight of pipes filled with water, inside and outside surface areas.

### Schedule - Terminology

Introduction to the schedule terminology of pipes.

### Stainless Steel Pipes - Dimensions and Weights

Dimensions, wall thickness and weights of stainless steel pipes according to ASME B36.19 Stainless Steel Pipes.

### Steel Flats - Weights

Typically weight of mild steel flats.

### Steel Pipes - Weight

Weight of steel pipes and tubes vs. wall thickness.

### Steel Plates - Sizes & Weights

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### Welded Steel Pipes - Weights

Nominal weights of welded steel pipes ranging 26 - 60 inches.

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