Plumbing Formulator

Plumbing Formulator

Forumulas for Plumbers

7 ratings
11 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 30, 2009
  • July 8, 2026

Features

Plumbing Formulator screenshot #1 for iPhone
Plumbing Formulator screenshot #2 for iPhone
Plumbing Formulator screenshot #3 for iPhone
Plumbing Formulator screenshot #4 for iPhone
Plumbing Formulator screenshot #5 for iPhone
Plumbing Formulator screenshot #6 for iPhone
Plumbing Formulator screenshot #7 for iPhone
Plumbing Formulator screenshot #8 for iPhone
Plumbing Formulator screenshot #9 for iPhone
Plumbing Formulator screenshot #10 for iPhone
iphone
ipad
🖼️Get Icon
Icons↘︎

About

This professional calculator app provides over 200 formulas, calculators, and reference materials for plumbers, HVAC technicians, and mechanical contractors. It covers a wide range of calculations for water flow, piping, drainage, water heaters, pumps, and more, all in one pocket-sized tool.

Over 200 formulas and calculators
Water flow and supply calculations
Pipe and piping calculations
Drainage and venting calculations
Water heater and pump calculations
Reference charts and code books
Pipe cut list optimizer
Show original description

What's New in Plumbing Formulator

6.1

July 8, 2026

NEW: BUSINESS MANAGEMENT Plumbing Formulator is now more than a calculator. This update adds a complete Business system so you can run your service company from the same app you already use on the job. Tap Business on the home screen to get started. Customers Keep a full customer list with contacts, service addresses, job history, and outstanding balances. Look up any client in seconds from the field. Quotes and Estimates Build professional quotes on site, add parts and labor, and email or print them for your customer. Turn an approved quote into an invoice with a single tap. Invoicing Create polished, branded invoices with your logo, itemized parts and labor, taxes, and payment terms. Send them by email, print, or share a PDF right from the job site. Payments Record payments by cash, check, credit card, ACH, or account credit. Apply a single payment across multiple invoices, track partial payments, and manage customer credit balances automatically. Scheduling and Appointments Schedule service calls, keep a calendar of upcoming jobs, and set up recurring service contracts that generate invoices automatically. Schedule service calls, keep a calendar of upcoming jobs, and set up recurring service contracts that generate invoices automatically. Business Reports See outstanding balances, accounts receivable aging, revenue, and payment history at a glance. Export any report as CSV or PDF for your records or your accountant. Cloud Sync Your business data stays up to date across your iPhone and iPad through iCloud. Business features are available as a separate one-time upgrade, with special pricing for existing Bill-Craft and ServiceBoss customers. Plus the usual round of refinements and fixes. Thanks for using Plumbing Formulator. --- That's about 1,600 characters — well within the limit, and release notes read better short than padded. A few checks before you paste: - Cloud Sync line — only keep it if iCloud sync is verified in this build (your notes flag device verification + Dev→Prod schema promotion as still pending). - Loyalty pricing line — keep only if that discount is actually live at launch.

More
2

In-App Purchases

$3.99

Pro Purchase

Unlock save, share, compare and all the charts

User reviews

Bugs not fixed

When using this app and entering numbers for calculations, into the small white boxes, you cannot see the numbers you are entering.

For use in uk

Please update units for uk preference otherwise app is useless here

Don't waste your money.

Memorize 1.414 for 45 offsets and get a Frankland book. Totally useless. Who's going to know the ID of 3" copper tubing so the app can figure out the weight per foot? It depends on the tubing type...bottom line why calculate this when this info is readily available. How about instead ask me for tubing size, tubing type (DWV, K, L, M, ACR/MED) and the length to calc weight per ft dry and wet. No...let me get my calipers and measure the ID...stupid.
Show more

CRAP

Don't waste your money!

Brutal

This app would be half decent if it had anything I could actually use. I'm a first year plumber and the only thing I found useful was the temperature conversions you can find anywhere. Nothing on the properties of gas, densities, relative densities I couldn't even find anything on grades. You think for 4$ they could at least at the properties of gas sheet since most plumbers do gas fitting. Save your money!!!
Show more

Developer apps

FAQ

What types of calculations does Plumbing Formulator offer?

Plumbing Formulator offers a comprehensive suite of calculations including water flow and supply, pipe sizing, drainage and venting, water heaters, pumps, storm drainage, gas piping, medical gas systems, swimming pools, septic systems, and thermal expansion. It also includes tools like a pipe cut list optimizer.

Does Plumbing Formulator include reference materials?

Yes, Plumbing Formulator includes extensive reference materials such as dozens of professional plumbing charts and tables, the complete Massachusetts Plumbing Code (248 CMR), a comprehensive plumbing design and installation guide, and technical drawings.

Is Plumbing Formulator available on Android devices?

Based on the provided data, Plumbing Formulator is available on iPhone and iPad. Information regarding Android availability is not specified.

How often is Plumbing Formulator updated?

The latest version of Plumbing Formulator is 6.0.1, and it was last updated on February 14, 2026. This indicates a commitment to regular updates and maintenance.

What is the user rating for Plumbing Formulator?

Plumbing Formulator has a strong user rating of 4.6 stars, based on 7 ratings. This suggests a high level of user satisfaction with the app's functionality and utility.

Does Plumbing Formulator have ads?

No, Plumbing Formulator does not contain advertisements. This allows for an uninterrupted user experience while performing calculations and accessing reference materials.

What is the age rating for Plumbing Formulator?

Plumbing Formulator has an age rating of 4+. This indicates that the content is generally suitable for all ages, though professional use is intended for adults in the plumbing and HVAC trades.

Can Plumbing Formulator be used offline?

The provided description does not explicitly state whether Plumbing Formulator can be used offline. However, as a calculator and reference tool, it is likely designed to function without a constant internet connection for its core features.