Pipe Diameter Calculator

312 reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Pipe Diameter Calculator is designed for simple and quick calculation of pipe and duct dimensions based on a known flow rate and desired fluid velocity.

Calculate the required internal diameter of a round pipe or the required height of a rectangular duct for a given volume or mass flow rate and desired flow velocity.

The calculator can also determine flow velocity when the pipe or duct dimensions and flow rate are known.

Both volume flow and mass flow inputs are supported. For mass flow calculations, fluid density can be entered directly. Gas density can also be calculated from absolute pressure, temperature, and specific gas constant using the ideal gas equation.

Features include:
• Pipe diameter calculation
• Flow velocity calculation
• Round pipes and rectangular ducts
• Volume flow and mass flow input
• Liquid and gas calculations
• Ideal gas density calculation
• Metric and Imperial units
• Fast and easy engineering calculation
Calculate pipe diameter and flow velocity for round pipes and rectangular ducts
Updated on
Aug 30, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, Personal info and 5 others
  • This app may collect these data types
    Location, Personal info and 5 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

297 reviews
R G O 2 (BaelRathLian)
December 16, 2021
Not quite there yet. We know\knew the length and pipe diameter. What I am looking for is to enter those and get the others based on industry standards.
5 people found this review helpful
Did you find this helpful?
A Google user
May 21, 2019
sucks won't let you input a different pipe size about half of the calculations fields are locked so unless you need a 2" pipe every time useless
18 people found this review helpful
Did you find this helpful?
Tim Cuthbert
March 25, 2023
As an engineer I use this app daily. Extremely helpful.
2 people found this review helpful
Did you find this helpful?

What’s new

Version 2.0 brings a completely redesigned Pipe Diameter Calculator with a modern interface, improved usability, and expanded calculation options. Calculate pipe diameter or fluid velocity for circular pipes and rectangular ducts using volume or mass flow, with Metric and Imperial units.
Content rating
Everyone
Learn more

App support

About the developer
Zoran Savović
zoran73@gmail.com
Bulevar Cara Lazara 33 61 21000 Novi Sad Serbia

More by pipeflowcalculations.com