# Pipe Weight Calculator

Calculate pipe weight per foot and total weight for steel, stainless, copper, PVC, and cast iron. Select NPS size and schedule for wall thickness.

## What this calculates

Knowing pipe weight is essential for structural support design, rigging and lifting calculations, shipping estimates, and material procurement. This calculator provides weight per foot and total weight for common pipe materials and sizes based on standard NPS dimensions and schedule wall thicknesses.

## Inputs

- **Pipe Material** — options: Carbon Steel, Stainless Steel, Copper (Type L), PVC (Schedule 40), Cast Iron — Pipe material affects weight and available sizes
- **Nominal Pipe Size** — options: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4" — NPS (Nominal Pipe Size)
- **Schedule** — options: Schedule 10 (thin wall), Schedule 40 (standard), Schedule 80 (heavy wall) — Schedule determines wall thickness
- **Pipe Length** (ft) — min 0.1, max 1000 — Standard pipe lengths are 10 or 20 feet
- **Number of Pieces** — min 1, max 500

## Outputs

- **Weight per Foot** (lbs/ft) — Weight per linear foot of pipe
- **Total Weight** (lbs) — Total weight for specified length and quantity
- **Wall Thickness** (in) — Pipe wall thickness for selected schedule
- **Inner Diameter** (in) — Inside diameter of the pipe

## Details

Pipe weight is calculated from the annular cross-section: W = π/4 × (OD² - ID²) × 12 × density, where OD is the outer diameter, ID is the inner diameter, and density is the material density in pounds per cubic inch. The inner diameter equals the outer diameter minus twice the wall thickness.

NPS (Nominal Pipe Size) does not equal the actual outer diameter except for sizes 14 inches and above. For example, a 1-inch NPS pipe has an actual OD of 1.315 inches. The schedule number determines wall thickness: Schedule 10 is thin-wall, Schedule 40 is the most common standard wall, and Schedule 80 is heavy-wall for high-pressure applications.

Material density significantly affects weight. PVC pipe weighs only about 18% as much as steel pipe of the same dimensions. Copper pipe is heavier than steel. When specifying pipe for structural applications (handrails, frames, supports), always use the schedule weight for load calculations, not the nominal size.

## Frequently Asked Questions

**Q: What is the difference between pipe schedule 40 and 80?**

A: Schedule 40 and 80 refer to wall thickness for a given pipe size. Schedule 80 has a thicker wall, higher pressure rating, and heavier weight. Both share the same outer diameter (OD), so Schedule 80 has a smaller inner diameter. Schedule 40 is standard for most plumbing and structural applications; Schedule 80 is used for high-pressure industrial piping.

**Q: How much does a 20-foot length of 2-inch Schedule 40 steel pipe weigh?**

A: A 2-inch NPS Schedule 40 steel pipe weighs approximately 3.65 lbs per foot. A 20-foot length weighs about 73 lbs. This is useful for rigging calculations and ensuring pipe racks and supports are adequately designed.

**Q: What does NPS mean?**

A: NPS stands for Nominal Pipe Size. For sizes below 14 inches, the NPS does not match the actual outer diameter. A 1-inch NPS pipe has a 1.315-inch OD. The NPS system originated historically and persists because the entire piping industry (fittings, valves, flanges) is standardized around these nominal sizes.

**Q: Is pipe the same as tube?**

A: No. Pipe is specified by NPS (nominal pipe size) and schedule, with standardized outer diameters. Tube is specified by exact outer diameter and wall thickness. A 1-inch pipe (1.315 OD) and a 1-inch tube (1.000 OD) are completely different sizes. Never substitute one for the other without verifying dimensions.

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Source: https://vastcalc.com/calculators/construction/pipe-weight
Category: Construction
Last updated: 2026-04-21