Plumbing Formulator
Forumulas for Plumbers
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
PLUMBING FORMULATOR is the ultimate professional calculator for plumbers, HVAC
technicians, and mechanical contractors. With over 200 formulas and
calculators, reference charts, code books, and professional tools, this app
puts essential plumbing calculations right in your pocket.
CALCULATORS AND FORMULAS
Water Flow and Supply
Calculate pipe velocity, volume flow rate, gallons per minute, fixture unit
demand, and water supply sizing. Determine optimum flow rates and total pipe
dimensions for any project.
Pipes and Piping
Calculate pipe area, volume, weight of various pipe materials including
copper, steel, cast iron, and plastic. Determine friction loss using
Hazen-Williams formula, pressure ratings, expansion due to temperature
changes, and offset calculations for 45 degree bends.
Drainage and Venting
Size drain pipes, calculate slope and fall, determine vent pipe sizing, and
figure drainage fixture units. Includes horizontal and vertical wet vent
calculations.
Water Heaters
Calculate BTU requirements, recovery rates, storage tank sizing, first hour
ratings, and domestic hot water demand. Determine energy costs and efficiency
ratings.
Pumps and Pressure
Calculate water horsepower, brake horsepower, pump efficiency, head pressure,
velocity head, and system curves. Convert between PSI and feet of head.
Storm Drainage
Size roof drains, calculate rainfall intensity, determine gutter and leader
sizing, and figure retention requirements.
Gas Piping
Size natural gas and propane lines, calculate BTU loads, determine pressure
drop, and figure appliance demand.
Medical Gas Systems
Size oxygen, nitrogen, nitrous oxide, and medical air piping. Calculate vacuum
system demand, pressure drop, cylinder manifold requirements, and system flow
rates per NFPA 99 standards.
Swimming Pools
Calculate pool volume for rectangular and circular pools, determine fill time,
pump sizing, turnover rates, evaporation loss, and main drain requirements.
Septic and Sewage
Size septic tanks, calculate leach field requirements, and determine sewage
pump capacity.
Thermal Expansion
Calculate expansion tank sizing, system pressure, and pipe length changes due
to temperature.
REFERENCE MATERIALS
Charts and Tables
Access dozens of professional plumbing reference charts including pipe sizing
tables, fixture unit charts, and material specifications in PDF format.
Massachusetts Plumbing Code
Complete 248 CMR plumbing code reference with all chapters available for quick
lookup.
Plumbing Design Guide
Comprehensive 24 chapter plumbing design and installation guide covering
residential, commercial, and specialized systems.
Technical Drawings
Professional plumbing diagrams and installation details.
TOOLS AND FEATURES
Pipe Cut List Optimizer
Enter your required pipe lengths and stock sizes to get an optimized cutting
plan that minimizes waste.
Unit Conversions
Convert between US and metric units for length, area, volume, flow rate,
pressure, temperature, weight, and power.
Geometry Calculators
Calculate area and volume for circles, rectangles, triangles, cylinders,
spheres, cones, and other shapes.
PLUMBING PRO FEATURES
Upgrade to Plumbing Pro for additional capabilities including saving
calculations with full input and output details, exporting results, unlimited
calculation history, and an ad-free experience. One time purchase with
lifetime access.
The app features a modern dark interface designed for easy use on the job
site. All calculators include detailed breakdowns showing the calculation
steps and formulas used.
Perfect for licensed plumbers, apprentices, HVAC technicians, mechanical
engineers, building inspectors, and anyone working in the plumbing and
mechanical trades.
Download Plumbing Formulator today and have professional plumbing calculations
at your fingertips.
Totally rewritten code base for modern devices, 70 new formulas, new drawings, Mass plumbing code. Ability to save and compare results Plus minor bug fix.
The developer, Historycentral.com, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Historycentral.com Inc
- Size
- 123 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Version $1.99
- Copyright
- © Historycentralcom 2026