Pipe Flow Calculator

Find volumetric flow rate from pipe diameter and velocity.

Pipe diameter

Flow velocity

Flow rate (m³/s) 0.0157

Flow rate (L/min) 942.48

Formula: Q = π·(D/2)²·v

Step-by-step with your numbers:

1. Values used:

2. Pipe diameter = 0.1

3. Flow velocity = 2

5. Flow rate = 0.0157m³/s

6. Flow rate = 942.48L/min

Did we solve your problem today?

Pipe flow rate is the cross-sectional area times the flow velocity.

The math behind it

Q = A·v = π·(D/2)²·v. Multiply m³/s by 60,000 for litres per minute.

0.1 m pipe at 2 m/s → about 0.0157 m³/s (943 L/min).

Why does diameter matter so much?

Area grows with the square of diameter, so flow rises steeply with pipe size.