ASTM D1785 / NSF 61 Schedule 40 True ID: 0.824" (20.93 mm) 480 PSI @ 73°F

3/4" Schedule 40 PVC Pipe Volume & Capacity Calculator

Standard 3/4" nominal Schedule 40 PVC pipe has an exact inside diameter of 0.824 inches, holding 0.0277 US gallons (0.344 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

0.5540 US gallons

≈ 2.097 litres

Unit Conversions

US Gallons 0.5540 gal

Litres 2.097 L

Cubic Feet (ft³) 0.0741 ft³

Cubic Inches (in³) 127.98 in³

Imperial Gallons 0.4613 UK gal

Cubic Meters (m³) 0.0021 m³

Filled Water Weight 4.6 lbs (2.1 kg)

Linear Capacity Rate 0.0277 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

3/4" 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	0.028 gal	0.10 L	0.004 ft³	0.2 lbs	0.2 lbs	0.4 lbs
2 ft	0.055 gal	0.21 L	0.007 ft³	0.5 lbs	0.4 lbs	0.9 lbs
5 ft	0.138 gal	0.52 L	0.019 ft³	1.2 lbs	1.1 lbs	2.2 lbs
10 ft	0.277 gal	1.05 L	0.037 ft³	2.3 lbs	2.1 lbs	4.4 lbs
20 ft	0.554 gal	2.10 L	0.074 ft³	4.6 lbs	4.3 lbs	8.9 lbs
50 ft	1.39 gal	5.2 L	0.18 ft³	11.6 lbs	10.7 lbs	22.2 lbs
100 ft	2.77 gal	10.5 L	0.37 ft³	23.1 lbs	21.3 lbs	44.4 lbs
250 ft	6.92 gal	26.2 L	0.93 ft³	57.8 lbs	53.3 lbs	111.0 lbs
500 ft	13.85 gal	52.4 L	1.85 ft³	115.5 lbs	106.5 lbs	222.0 lbs

Engineering Formula

How to Calculate 3/4" 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 3/4", but true inner diameter is 0.824 inches.

r = ID / 2 = 0.824 / 2 = 0.4120"

Step 2

Calculate Cross-Sectional Area (A)

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

A = \pi \times (0.4120)^2 = 0.5333 sq in

Step 3

Calculate Linear Foot Volume

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

V_linear = 0.5333 \times 12 = 6.399 cu in/ft

Step 4

Convert to US Gallons & Liters

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

Gallons/Ft = 6.399 / 231 = 0.0277 Gal/Ft

Technical Specifications

3/4" Schedule 40 PVC Engineering Profile

Physical dimensions, pressure thresholds, and hydraulic velocity limits.

Outside Diameter (OD)

1.05 inches

26.7 mm

Inside Diameter (ID)
0.824 inches
20.93 mm

Wall Thickness

0.113 inches

ASTM D1785 Tolerance

Max Recommended Flow

8.3 GPM

At 5 ft/s velocity

Working Pressure

480 PSI

At 73°F (23°C)

Max Temperature Limit

140°F

60°C continuous

Common Plumbing & Piping Applications for 3/4" Schedule 40:

Main residential irrigation supply zones
Pool and spa circulation return lines
Condensate drainage lines

Primary Use Case: Ideal for lawn sprinkler mainline supply, outdoor plumbing feeds, and greenhouse irrigation distribution manifolds.

Size Navigation

Compare Other PVC Pipe Sizes

Explore adjacent diameter calculations or compare with different pressure schedules.

← Previous Size 1/2" Schedule 40 PVC Overview Directory All PVC Pipe Sizes (Sch 40 & 80) Next Size → 1" Schedule 40 PVC Compare Alternative Schedule ↔ 3/4" Schedule 80 PVC

Cross-Material Comparison

Compare 3/4" Pipe in Other Materials

Compare fluid holding capacity, wall thickness, and weight against other standard piping materials for 3/4" nominal diameter:

Copper Tubing (ASTM B88) 3/4" 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 3/4" Flow Rate Calculator

Expert FAQ Guide

3/4" Schedule 40 PVC FAQs

Frequently asked engineering and volumetric capacity questions for 3/4" PVC.

3 Questions Answered

Q1 How many gallons does a 100 ft 3/4" Schedule 40 PVC pipe hold?

A 100-foot run of 3/4 inch Schedule 40 PVC pipe holds approximately 2.77 US Gallons (10.49 Liters) of water.

Q2 What is the inside diameter of 3/4 inch Schedule 40 PVC pipe?

The inside diameter is 0.824 inches (20.93 mm), with a nominal outer diameter of 1.050 inches and wall thickness of 0.113 inches.

Q3 What is the maximum recommended flow rate for 3/4" PVC pipe?

To prevent water hammer and excessive friction erosion, the recommended flow velocity is 5 ft/s, which gives roughly 8.3 GPM (Gallons Per Minute).

Total Liquid Capacity

Unit Conversions

3/4" Schedule 40 PVC Quick Reference Sizing Chart

How to Calculate 3/4" PVC Pipe Volume Manually

Determine the Internal Radius (r)

Calculate Cross-Sectional Area (A)

Calculate Linear Foot Volume

Convert to US Gallons & Liters

3/4" Schedule 40 PVC Engineering Profile

Common Plumbing & Piping Applications for 3/4" Schedule 40:

Compare Other PVC Pipe Sizes

Compare 3/4" Pipe in Other Materials

3/4" Schedule 40 PVC FAQs

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