PipeBook Pipefitter Calculator
Rolling Offset & Flange Charts
Only for iPhone
$12.99 · Designed for iPhone. Not verified for macOS.
iPhone
New in 1.1.0: weight and fill for pipe, plate and tube, a right angle solver with grade, and a metric switch that runs the whole app in millimetres.
The pipefitter's pocket reference and field calculator. One purchase, no subscription, no account. Yours.
REFERENCE: verified, not scraped
Every dimension in PipeBook is extracted from two independent published sources, machine-compared, and hand-resolved against a third before it ships. The handful of values that haven't cleared that process are marked in the app, in plain sight, rather than quietly shipped. No guesses, no filler.
• Pipe schedules (ASME B36.10M/B36.19M): wall, ID in decimals and 16ths, weight per foot. NPS 1/8 to 48, Schedule 5 through XXS
• Fitting takeoffs (ASME B16.9), the takeouts on the print: 90s and 45s (LR and SR), tees, concentric and eccentric reducers, caps, stub ends, 1/2 to 24
• Flanges (ASME B16.5, classes 150/300/600): OD, thickness, bolt circle, hub, length thru hub, plus the full bolt-up: stud count, diameter, and length (RF and RTJ) and B16.20 ring gasket numbers
CALCULATORS: fraction-native, in 16ths, 32nds or 64ths
• Rolling offset: set, roll, travel, run. Pick a pipe size and get the end-to-end cut length with the takeoffs and your welder's root gap already subtracted
• Cut a fitting: any angle out of a factory 90, with the heel, centerline and throat marks
• Miter cuts: cut angle, cutback, heel-to-throat drop, segment lengths
• Parallel offset: equal-spread runs through any turn
• Right angle: any two of set, run, travel or angle gives the rest, with grade in percent and inches per foot
• Weight & fill: pipe, plate and tube weight, and what the line holds. Pounds and gallons per foot of water, for rigging and hydro
• Feet & inches: running tape math that accepts 3' 4 1/2 and never loses a 16th
BUILT FOR THE FIELD
• Works completely offline. No license checks, no sign-in, nothing to time out in a basement or on a pipeline right-of-way
• Send the welder the cut: the text and a dimensioned diagram, straight out of the calculator, with the root gap it assumed printed on the drawing
• Type "6 90" and get the 6-inch takeoffs. "6 150" gets the flange. "dn150" works too
• Metric: one switch and every calculator takes and gives millimetres. Tables show mm, kg/m and DN
• Pin your job's sizes; your recent lookups stay one tap away
• Screen stays awake while a table is open
• Big targets that work with gloves on
No ads. No subscription. No accounts. Features never move behind a paywall.
Built in the U.S.A. by one developer who answers email.
Two new calculators, and metric throughout.
WEIGHT & FILL: pipe, plate and tube weight, and what the line holds when full. Pounds and gallons per foot, or kilograms and litres per metre.
RIGHT ANGLE: any two of set, run, travel or angle gives you the rest, with grade in percent and inches per foot.
METRIC: one switch in Settings and every calculator takes and gives millimetres. Tables show mm, kg/m and DN.
Thanks to the fitter who wrote in asking for more functions. This is that update.
The developer, Aaron Peabody, 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
- Aaron Peabody
- Size
- 32.5 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Aaron Peabody
