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ASTM D1785 / NSF 61 Schedule 40 True ID: 1.049" (26.64 mm) 450 PSI @ 73°F

1" Schedule 40 PVC Pipe Volume & Capacity Calculator

Standard 1" nominal Schedule 40 PVC pipe has an exact inside diameter of 1.049 inches, holding 0.0449 US gallons (0.558 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
0.8979 US gallons
≈ 3.399 litres

Unit Conversions

US Gallons 0.8979 gal
Litres 3.399 L
Cubic Feet (ft³) 0.1200 ft³
Cubic Inches (in³) 207.42 in³
Imperial Gallons 0.7477 UK gal
Cubic Meters (m³) 0.0034 m³
Filled Water Weight 7.5 lbs (3.4 kg)
Linear Capacity Rate 0.0449 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

1" 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 0.045 gal 0.17 L 0.006 ft³ 0.4 lbs 0.3 lbs 0.7 lbs
2 ft 0.090 gal 0.34 L 0.012 ft³ 0.7 lbs 0.6 lbs 1.4 lbs
5 ft 0.225 gal 0.85 L 0.030 ft³ 1.9 lbs 1.6 lbs 3.4 lbs
10 ft 0.449 gal 1.70 L 0.060 ft³ 3.7 lbs 3.1 lbs 6.9 lbs
20 ft 0.898 gal 3.40 L 0.120 ft³ 7.5 lbs 6.3 lbs 13.8 lbs
50 ft 2.25 gal 8.5 L 0.30 ft³ 18.7 lbs 15.8 lbs 34.4 lbs
100 ft 4.49 gal 17.0 L 0.60 ft³ 37.4 lbs 31.5 lbs 68.9 lbs
250 ft 11.23 gal 42.5 L 1.50 ft³ 93.5 lbs 78.8 lbs 172.3 lbs
500 ft 22.45 gal 85.0 L 3.00 ft³ 187.0 lbs 157.5 lbs 344.5 lbs
Engineering Formula

How to Calculate 1" 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 1", but true inner diameter is 1.049 inches.

r = ID / 2 = 1.049 / 2 = 0.5245"
Step 2

Calculate Cross-Sectional Area (A)

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

A = \pi \times (0.5245)^2 = 0.8643 sq in
Step 3

Calculate Linear Foot Volume

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

V_linear = 0.8643 \times 12 = 10.371 cu in/ft
Step 4

Convert to US Gallons & Liters

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

Gallons/Ft = 10.371 / 231 = 0.0449 Gal/Ft
Technical Specifications

1" Schedule 40 PVC Engineering Profile

Physical dimensions, pressure thresholds, and hydraulic velocity limits.

Outside Diameter (OD)
1.315 inches
33.4 mm
Inside Diameter (ID)
1.049 inches
26.64 mm
Wall Thickness
0.133 inches
ASTM D1785 Tolerance
Max Recommended Flow
13.5 GPM
At 5 ft/s velocity
Working Pressure
450 PSI
At 73°F (23°C)
Max Temperature Limit
140°F
60°C continuous

Common Plumbing & Piping Applications for 1" Schedule 40:

  • Primary residential service entry lines
  • Commercial irrigation sub-mains
  • Water treatment backwash plumbing

Primary Use Case: The gold standard for residential water supply mains, large lawn irrigation loops, and agricultural drip supply headers.

Size Navigation

Compare Other PVC Pipe Sizes

Explore adjacent diameter calculations or compare with different pressure schedules.

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

Compare 1" Pipe in Other Materials

Compare fluid holding capacity, wall thickness, and weight against other standard piping materials for 1" nominal diameter:

Copper Tubing (ASTM B88) 1" 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 1" Flow Rate Calculator
Expert FAQ Guide

1" Schedule 40 PVC FAQs

Frequently asked engineering and volumetric capacity questions for 1" PVC.

2 Questions Answered
Q1 How much water is inside a 1-inch Schedule 40 PVC pipe per foot?

A 1" Schedule 40 PVC pipe holds 0.0449 US Gallons (0.170 Liters / 0.006 cubic feet) per linear foot.

Q2 How many feet of 1" PVC pipe make 1 gallon of water?

It takes approximately 22.27 linear feet of 1-inch Schedule 40 PVC pipe to contain exactly 1 US gallon of water.

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