TrueOffset

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Free Android app — works offline, no pop-up ads.
Get it on Google Play
Pipe offset and fitting calculators. Works offline. No pop-up ads.
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Offsets
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Pipe Offset Calculator
Travel and run for 11¼, 22½, 30, 45 and 60° offsets, with the multipliers.
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Rolling Offset Calculator
True offset, travel, run and roll angle from rise and roll. Or the fitting angle for a set run.
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Parallel Offset Calculator
Several pipes through the same offset: where each next one starts so the spacing stays equal.
Conduit
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Conduit Bending Calculator
Offsets, 90° stub-ups, back-to-back 90s, 3- and 4-point saddles and kicks for EMT, IMC and rigid: bend marks, shrink, take-up and gain, with your own bender's values.
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Conduit Fill Calculator
NEC Chapter 9 fill for EMT, IMC, rigid and PVC: THHN or XHHW wires, fill %, the 53 / 31 / 40 % limit and the most wires that fit.
Cuts & fabrication
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Pipe Cut Length Calculator
Center-to-center minus fitting take-outs and weld gaps. Plus take-out of an elbow cut to any angle.
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Mitered Elbow Calculator
Segmented elbow from straight pipe: cut angle, segment lengths (long and short side) and take-out.
Measure & convert
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Pipe Slope Calculator
Fall over a run at ¼", ⅛" or any slope per foot, or the slope from a measured drop. IPC minimums.
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Feet-Inch Calculator
Add, subtract, multiply and divide feet, inches and fractions.
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Right Triangle & Squaring Calculator
Rise, run, diagonal, angle and pitch; diagonals and 3-4-5 for squaring.
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Construction Unit Converter
Convert feet, inches, meters, sq ft, acres, cu yd, gallons, pounds, tons and more.
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Bubble Level
Phone level and inclinometer: angle, slope % and rise per foot.

Reference charts

Conduit Bending Chart
Conduit offset multipliers and shrink for 10°, 22½°, 30°, 45° and 60° bends, mark spacing and shrink for 2" to 12" offsets, 3-point saddle marks and EMT take-up.
Conduit Fill Chart
Maximum number of THHN / THWN-2 wires, 14 AWG to 1/0, in 1/2" to 4" EMT, worked out from NEC Chapter 9 Tables 1, 4 and 5 with the Note 7 round-up.
Pipe Offset Chart
Pipe offset multipliers for 11¼°, 22½°, 30°, 45° and 60° fittings, travel and run for 2" to 36" offsets, and the start-mark advance for parallel offsets.
Rolling Offset Chart
Rolling offset chart and formula: true offset and travel for 45° fittings with 2" to 24" set and roll, travel and run for 22½° and 60° fittings, and a worked example.
Pipe Slope Chart
How much a drain pipe falls over 5 to 100 feet at 1/16", 1/8" and 1/4" per foot, with the percent grade and the IPC minimum slope by pipe size.

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