ASTM D1785 / ASTM D2665 Schedule 40 True ID: 4.026" (102.26 mm) 220 PSI @ 73°F

4" Schedule 40 PVC Pipe Volume & Capacity Calculator

Standard 4" nominal Schedule 40 PVC pipe has an exact inside diameter of 4.026 inches, holding 0.6613 US gallons (8.213 liters per meter) per linear foot. Part of our PVC Pipe Volume Hub and universal Pipe Volume Calculator suite.

Presets:

Calculated Result

Total Liquid Capacity

Internal Holding Volume

13.226 US gallons

≈ 50.067 litres

Unit Conversions

US Gallons 13.226 gal

Litres 50.067 L

Cubic Feet (ft³) 1.768 ft³

Cubic Inches (in³) 3,055.26 in³

Imperial Gallons 11.013 UK gal

Cubic Meters (m³) 0.0501 m³

Filled Water Weight 110.3 lbs (50.1 kg)

Linear Capacity Rate 0.6613 gal/ft

Calculations are based on cylindrical formula $V = \pi r^2 L$. Verify dimensions against manufacturer specs for code submittals.

Pre-Calculated Capacity Table

4" Schedule 40 PVC Quick Reference Sizing Chart

Instant capacity and weight lookup table for common pipe lengths filled with water at 60°F (15.5°C).

Pipe Length (Ft)	US Gallons	Liters	Cubic Feet (ft³)	Water Weight (lbs)	Dry Pipe (lbs)	Total Wet Weight
1 ft	0.661 gal	2.50 L	0.088 ft³	5.5 lbs	2.0 lbs	7.5 lbs
2 ft	1.323 gal	5.01 L	0.177 ft³	11.0 lbs	4.0 lbs	15.1 lbs
5 ft	3.306 gal	12.52 L	0.442 ft³	27.6 lbs	10.0 lbs	37.6 lbs
10 ft	6.613 gal	25.03 L	0.884 ft³	55.1 lbs	20.1 lbs	75.3 lbs
20 ft	13.226 gal	50.07 L	1.768 ft³	110.3 lbs	40.2 lbs	150.5 lbs
50 ft	33.06 gal	125.2 L	4.42 ft³	275.8 lbs	100.5 lbs	376.3 lbs
100 ft	66.13 gal	250.3 L	8.84 ft³	551.5 lbs	201.0 lbs	752.5 lbs
250 ft	165.32 gal	625.8 L	22.10 ft³	1378.8 lbs	502.5 lbs	1881.3 lbs
500 ft	330.65 gal	1251.7 L	44.20 ft³	2757.5 lbs	1005.0 lbs	3762.5 lbs

Engineering Formula

How to Calculate 4" PVC Pipe Volume Manually

Step-by-step mathematical demonstration using cylinder geometric principles and ASTM D1785 specifications.

Step 1

Determine the Internal Radius (r)

Nominal size is 4", but true inner diameter is 4.026 inches.

r = ID / 2 = 4.026 / 2 = 2.0130"

Step 2

Calculate Cross-Sectional Area (A)

Compute circular cross-section area using $A = \pi \times r^2$:

A = \pi \times (2.0130)^2 = 12.7303 sq in

Step 3

Calculate Linear Foot Volume

Multiply cross-sectional area by 12 inches (1 linear foot):

V_linear = 12.7303 \times 12 = 152.763 cu in/ft

Step 4

Convert to US Gallons & Liters

Divide cubic inches by 231 (cubic inches in 1 US Gallon):

Gallons/Ft = 152.763 / 231 = 0.6613 Gal/Ft

Technical Specifications

4" Schedule 40 PVC Engineering Profile

Physical dimensions, pressure thresholds, and hydraulic velocity limits.

Outside Diameter (OD)

4.5 inches

114.3 mm

Inside Diameter (ID)
4.026 inches
102.26 mm

Wall Thickness

0.237 inches

ASTM D1785 Tolerance

Max Recommended Flow

198.4 GPM

At 5 ft/s velocity

Working Pressure

220 PSI

At 73°F (23°C)

Max Temperature Limit

140°F

60°C continuous

Common Plumbing & Piping Applications for 4" Schedule 40:

Main building sewer lateral line
Under-slab building drain
Stormwater drainage piping

Primary Use Case: Standard size for residential main building sewer connections to city mains or septic tanks, and roof gutter storm downspout drainage.

Size Navigation

Compare Other PVC Pipe Sizes

Explore adjacent diameter calculations or compare with different pressure schedules.

← Previous Size 3" Schedule 40 PVC Overview Directory All PVC Pipe Sizes (Sch 40 & 80) Next Size → 6" Schedule 40 PVC Compare Alternative Schedule ↔ 4" Schedule 80 PVC

Cross-Material Comparison

Compare 4" Pipe in Other Materials

Compare fluid holding capacity, wall thickness, and weight against other standard piping materials for 4" nominal diameter:

Copper Tubing (ASTM B88) 4" Copper (Type K/L/M) Cast Iron DWV (ASTM A888) Cast Iron Soil Pipe Schedule 40 Steel (ASTM A53) Steel Schedule 40 Pipe Fluid Velocity & GPM 4" Flow Rate Calculator

Expert FAQ Guide

4" Schedule 40 PVC FAQs

Frequently asked engineering and volumetric capacity questions for 4" PVC.

3 Questions Answered

Q1 How many gallons does 100 feet of 4" PVC pipe hold?

A 100-foot run of 4-inch Schedule 40 PVC pipe holds 66.13 US Gallons (250.3 Liters) of water.

Q2 What is the inside diameter of 4-inch Schedule 40 PVC?

The true inside diameter is 4.026 inches (102.26 mm) with an outer diameter of 4.500 inches and wall thickness of 0.237 inches.

Q3 How heavy is a 100 ft 4" PVC pipe when full of water?

The pipe itself weighs approx 201 lbs, and the 66.13 gallons of water inside weigh 551.5 lbs, giving a total wet load of 752.5 lbs.

Total Liquid Capacity

Unit Conversions

4" Schedule 40 PVC Quick Reference Sizing Chart

How to Calculate 4" PVC Pipe Volume Manually

Determine the Internal Radius (r)

Calculate Cross-Sectional Area (A)

Calculate Linear Foot Volume

Convert to US Gallons & Liters

4" Schedule 40 PVC Engineering Profile

Common Plumbing & Piping Applications for 4" Schedule 40:

Compare Other PVC Pipe Sizes

Compare 4" Pipe in Other Materials

4" Schedule 40 PVC FAQs

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