Comparison

HVAC Pipe Sizer vs Pipe Diameter Calculators

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

HVAC Pipe Sizer

Calculate pipe sizes for liquid systems, including hot and chilled water. Input flow rate, head loss, diameter, or velocity to determine other properties. Supports various liquids, pipe materials, and fittings, with English or metric units.

Highlights
  • Liquid pipe sizing
  • Hydronic system calculations
  • Input flow, head loss, diameter, or velocity
  • Calculate fluid flow and head loss
  • Supports various liquids and pipe materials
  • English and metric unit options
  • Email results
Features
Read full description

The "HVAC Pipe Sizer - Liquid" application allows you to quickly size a simple pipe system by inputting a number of piping and liquid properties, including hot and chilled water (hydronic). This app is a universal app that works on both the iPhone and iPad and adjusts its screen size accordingly. This app now includes the HVAC Equipment Locator. Click here for details: http://bit.ly/1yTq539 You can specify the total fluid flow in GPM (or L/s) and one of either unit head loss (ft/100ft), pipe internal diameter (inches) or fluid velocity (ft/s) parameters. The results include both the exact and nominal pipe diameters and the calculated velocity and total head loss. If you are analyzing an existing pipe system, there is an option to input the existing pipe internal diameter and one of either unit head loss or fluid velocity parameters to derive the calculated fluid flow and other remaining properties. You can specify additional parameters such as the type of liquid, various properties of the liquid, the pipe material type, the total length of pipe, quantities for up to 11 different types of pipe fittings, and much more. You can also choose to display values in either english or metric units. This application includes built-in pipe fitting equivalent length and nominal pipe sizing tables for a wide variety of pipe material types and diameters. This application uses slider controls that allow you to quickly increment or decrement the input values and immediately observe the calculated results. You can also manually input exact values. The app allows you to email inputs and results once you have completed an analysis. We also offer the following additional applications for the iPhone/iPad: 1. HVAC Duct Sizer 2. HVAC Pipe Sizer โ€“ Gas Low Pressure 3. HVAC Pipe Sizer - Gas High Pressure 4. HVAC Pipe Sizer โ€“ Liquid 5. HVAC Pipe Sizer โ€“ Steam 6. Steam Tables 7. Psychrometric Plus 8. Psychrometric LT 9. HVAC Pipe Sizer Plus 10. HVAC Pipe Sizer Gas Plus 11. HVAC Toolkit 12. HVAC Toolkit Ultimate 13. HVAC Residential Load Calcs 14. HVAC Load Plus 15. HVAC Equipment Locator 16. ASHRAE Duct Fitting Database 17. ASHRAE 62.1 Ventilation Load Calcs 18. HVAC Psych HD 19. HVAC ResLoad-J 20. HVAC Residential Load Calcs HD

About

Pipe Diameter Calculators

Features
Read full description

Size a pipe from the numbers you already have. Pipe Diameter Calculator finds the internal diameter of a circular pipe from your flow rate and target flow velocity, or checks the velocity in a pipe whose internal diameter you already know. Built for quick line sizing on site, at the desk or in class, it suits piping, mechanical and process engineers, plumbing and HVAC professionals, pipefitters and engineering students. TWO WAYS TO CALCULATE โ€ข Find the internal diameter: enter the flow rate, fluid density and target velocity โ€ข Check flow velocity: enter a known internal diameter and the flow rate VOLUME OR MASS FLOW โ€ข Start from a volume flow rate or a mass (weight) flow rate โ€ข Choose your inputs and the value to solve for on the Selection screen CLEAR RESULTS โ€ข Cross-sectional area of the pipe โ€ข Weight (mass) flow rate โ€ข Flow velocity โ€ข Internal pipe diameter METRIC AND IMPERIAL UNITS โ€ข Pick a unit for each input and each result from its own menu โ€ข Mix units freely, for example enter the diameter in centimeters and read the velocity in feet per second SIMPLE AND PRIVATE โ€ข One clean screen, a Calculate button and a one-tap clear button โ€ข Free to download โ€ข No data collected HOW IT HELPS DAY TO DAY โ€ข Pick a starting pipe size for a new line before you check it against your design standard โ€ข Check whether the velocity in an existing pipe is reasonable for the duty โ€ข Work through flow and velocity exercises for coursework and exams Results are a quick engineering estimate based on the values you enter. Always confirm final pipe sizes against the codes, standards and design criteria that apply to your project. Download Pipe Diameter Calculator and size your next line in seconds. In-app purchase Details: Lifetime Access for ads free version Privacy Policy : https://visionaso.in/manager/privacypolicy.html Terms of use : https://visionaso.in/manager/termscondition.html

Screenshots

HVAC Pipe Sizer4 screens
Pipe Diameter Calculators4 screens

Verdict

The call

The clearest difference is price: Pipe Diameter Calculators at Free against HVAC Pipe Sizer's $4.99. Pipe Diameter Calculators also leads on iOS requirement (15.6 vs 17.0). HVAC Pipe Sizer's advantage is update cadence (every 8 months vs every 20 months). On ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Pipe Diameter Calculators is free to download; HVAC Pipe Sizer costs $4.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase and Pipe Diameter Calculators sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HVAC Pipe Sizer ships an update every 8 months, Pipe Diameter Calculators every 20 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

Scorecard3 real differences ยท 5 level
HVAC Pipe Sizer versus Pipe Diameter Calculators: the parameters behind the verdict, then further details
ParameterHVAC Pipe SizerPipe Diameter Calculators
Price$4.99Free โ€” better
Positive reviews71.4% of reviewsโ€”
Update frequencyEvery 8 months โ€” betterEvery 20 months
AdsNoNo
In-app purchasesYesYes
MonetizationPaidโ€”
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.015.6 โ€” better
Further details โ€” not scored
Size1 MB59 MB
Age rating+44+
DeveloperCarmel Software CorporationAshvin Kevadiya

In-app purchases

1 purchases

HVAC Pipe Sizer

One-time1
  • HVAC Equipment Locator$9.99
1 purchases

Pipe Diameter Calculators

One-time1
  • Lifetime$9.99

Questions

Is HVAC Pipe Sizer free?
HVAC Pipe Sizer costs $4.99, and also offers in-app purchases.
Is Pipe Diameter Calculators free?
Pipe Diameter Calculators is free to download, with in-app purchases available.
Do HVAC Pipe Sizer or Pipe Diameter Calculators have ads?
Neither HVAC Pipe Sizer nor Pipe Diameter Calculators shows ads.
Which is updated more often, HVAC Pipe Sizer or Pipe Diameter Calculators?
HVAC Pipe Sizer ships an update every 8 months, and Pipe Diameter Calculators every 20 months. Most recently, HVAC Pipe Sizer was updated on October 31, 2026 and Pipe Diameter Calculators on November 3, 2026.

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