BaseCalc Plumbing Calculator
Pipe Sizing Calculator
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Plumbing calculator for field math: pipe sizing, pressure drop, drainage, water heater, gas pipe, worksheets, and materials. Pay once for Lifetime Pro — no ads.
BaseCalc Plumbing Calculator is a plumbing calculator for field math, worksheets, materials, and saved calculation history. Run pipe sizing, pressure drop, drainage, vent sizing, water heater, gas pipe, pump head, fixture unit, septic, and other plumbing calculator checks on site, then save the result for the job.
18 CALCULATORS FOR DAILY FIELD WORK
• Pipe Velocity — velocity from GPM and nominal pipe size.
• Flow Rate — GPM from velocity and nominal pipe size.
• Pipe Sizing — minimum pipe size from GPM and max velocity.
• Pressure Drop — Hazen-Williams pressure loss.
• Drainage Sizing — fixture units to minimum drainage pipe diameter.
• Vent Sizing — fixture units plus vent length to minimum vent diameter.
• Water Heater — first-hour rating and recovery estimate.
• Gas Pipe Sizing — BTU/hr and length to minimum gas pipe size.
• Pump Head — total dynamic head from lift, friction, and pressure.
• Pipe Volume — gallons of water in a given length of pipe.
• Water Pressure — pressure and head conversion.
• Pipe Expansion — thermal expansion length change.
• Fixture Units — count common fixtures to total fixture units.
• Water Meter Sizing — fixture units to meter size.
• Irrigation Flow — zone GPM from heads and GPM per head.
• Septic Tank — bedrooms and daily flow to minimum tank volume.
• Grease Interceptor — fixture units or GPM to interceptor size.
• Backflow Pressure — pressure loss across backflow preventer.
EVERY RESULT IS EXPLAINED
• Clear sizing messages and pass/fail where applicable.
• The governing limit, final answer, and calculation breakdown.
• Saved local history so you keep a job-site record.
JOB RECORDS, MATERIALS, AND WORKSHEETS
• Save job contacts with site notes.
• Build job worksheets with scope, quantities, and site notes.
• Export worksheet PDFs for internal handoff or customer context.
• Plan common pull-list items before rough-in, service, and closeout.
• Send the finished billing handoff to SpeakSheet for the final invoice.
DEVICE-LOCAL FOR THE FIELD
• Works offline by default.
• No BaseCalc account or cloud sync.
• Job contact, worksheet, setting, and calculation data stays on this device, protected by your device security.
• There is no BaseCalc cloud option.
• Dark and light themes with a high-contrast job-site interface.
BaseCalc Plumbing is a professional reference tool. Always verify against current industry standards, manufacturer data, and local codes. The authority having jurisdiction has the final say.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
Introducing Lifetime Pro: pay once to unlock every calculator and remove all ads for good. Existing monthly and yearly subscriptions remain valid and continue to renew as before.
The developer, BASEMAPPED LLC, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- BASEMAPPED LLC
- Size
- 55.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Lifetime Pro $14.99
- Plumbing Pro Monthly $7.00
- Plumbing Pro Yearly $50.00
- Copyright
- © 2026 BaseMapped LLC