Pipe and Flange Charts · Free Tool

Pipe Volume and Weight Calculator

Calculate the internal volume of a pipe, the steel weight and the weight when full of liquid, for flushing, hydro testing and support loads.

Internal volumeSteel weightFull weightHydrotest water

Outside diameter

Wall thickness

Pipe length

Liquid density

kg/m³

Pipe material density (carbon steel 7850)

kg/m³

Internal diameter102.3 mm

Internal volume8.213 L/m, 0.8213 m³ total

Empty pipe weight16.08 kg/m, 1.608 t total

Weight full of liquid24.29 kg/m

Liquid for filling821.3 L

Formulas

ID = OD − 2t
Volume per metre = π ÷ 4 × ID²
Steel weight per metre = π ÷ 4 × (OD² − ID²) × ρ_steel

Diameters in metres for the formulas; carbon steel density about 7850 kg/m³, stainless about 8000 kg/m³.

4" Sch 40 (114.3 × 6.02 mm), 100 m: ID 102.26 mm, 8.21 L/m, 0.821 m³; steel 16.1 kg/m; full of water 24.3 kg/m.

Key insight: for hydro tests, add the volume of vessels, instruments and dead legs, and plan where the test water will drain.

How much water does a 4 inch pipe hold?

About 8.2 litres per metre for Schedule 40.

What density for stainless steel?

About 8000 kg/m³.

Does this include fittings?

No, add fittings separately or use equivalent lengths.

Instrumentation and control standards

A practical, field focused guide on instrumentationblog.in that explains the theory behind this tool and how engineers apply it on real plants.