WireGaugeCalc Free calculator · NEC cited · works offline
Conduit Offset Calculator
Conduit offset calculator is quick with WireGaugeCalc, since you enter the offset height and the bend angle and the tool returns the marks.
It multiplies the offset by the angle factor so you know the distance between bends and the shrink.
You get the mark spacing and the gain, so the pipe seats flush against the box.
Open the calculatorEnter any two values and read the rest.
Ohm’s law: V = I × R and P = V × I. Field aid only, verify against the current NEC and your local authority having jurisdiction.
How the Bending Offset Calculator Works
A bending offset calculator uses the offset height and a multiplier tied to the bend angle, so a 30 degree bend uses a factor of 2.
It returns the distance between your two bend marks, since that spacing sets the rise.
It also reports the shrink, so you can adjust the back-of-box measurement before bending.
What the Conduit Offset Tool Reports
Enter the basics and read the bend layout:
- Distance between the two bends
- Shrink per inch of offset
- Bend angle and its multiplier
- Total pipe length affected
- Mark placement from the box
One app for every NEC calculation
WireGaugeCalc keeps the calculations you reach for most in one place:
- Voltage drop and wire sizing for any run
- Conduit fill for EMT, PVC, and RMC
- Box fill and junction box sizing
- Ampacity and temperature derating
- Motor circuit and load calculations
- Conduit bend offsets and saddles
Built for the field, works offline
The whole app runs on your phone, so it keeps working in a basement, an attic, or a job site with no signal.
There is no account to create and nothing to load. Open it, run the number, and get back to work.
- No signup and no signal needed
- Answers in a tap, not a spreadsheet
- Same tool on phone, tablet, and desktop
Every result cites the NEC article
Each answer shows the table or formula it came from, so you can check the method and learn the code as you go.
That makes the app useful on the job and during exam prep, since the reasoning is right next to the number.
Switch the code year your job runs on
Jurisdictions adopt the NEC at different times, so you can match the calculation to the code in force:
- NEC 2017, 2020, and 2023 tables
- Copper and aluminum conductors
- 60, 75, and 90 degree C terminations
- Single-phase and three-phase systems
Run the number, then get back to work
Stop flipping through a paper book or hopping between calculator sites. Enter your values, read the code-cited answer, and move on. Free to use, no signup.
Open the calculatorFrequently asked questions
What multiplier do I use for a 30 degree offset?
A 30 degree offset uses a multiplier of 2, so a 6 inch offset gives 12 inches between bends. The calculator applies the multiplier for whatever angle you choose.
Why does shrink matter on an offset?
Shrink pulls the end of the conduit back as the bend rises, so ignoring it leaves the pipe short of the box. The tool reports shrink per inch, and you should still confirm box and support spacing against the current NEC and your local authority having jurisdiction.
Is WireGaugeCalc free to use?
Yes. Every calculator is free to run with no signup. A paid tier adds saved projects, PDF reports, and extra code years, but the core math stays free.
Does it work without internet?
Yes. The app runs on your device, so it keeps working with no signal on a job site, in a basement, or in an attic.
Are the results code accurate?
Results follow published NEC tables and standard formulas, and each answer shows the article it came from. It is a field aid, not a stamp of approval, so verify against the current code and your local authority before you wire anything.
Which NEC code year does it use?
You can switch between NEC 2017, 2020, and 2023, since jurisdictions adopt the code at different times. Pick the year your job runs on.