Key Takeaways
- 16 free online calculators on conduitbending.com cover every standard conduit bend type, from offsets to saddles to 90-degree stubs.
- The Conduit Bending iOS app works offline, supports EMT/IMC/Rigid from 1/2" to 4", and includes a bender library with deduct values for every common bender brand.
- Quick reference tables below cover deduct values, offset multipliers, and gain for all standard EMT sizes.
- For formulas, worked examples, and step-by-step instructions, see the Conduit Bending Guide.
Bending conduit by formula and mental math works, but it's slow and error-prone when you're standing at the bender with a foreman waiting. The right tools turn a 60-second calculation into a 5-second lookup.
This page covers the two fastest options: free online calculators on conduitbending.com and the Conduit Bending iOS app. Below each tool section you'll find the quick reference tables that the calculators are built on, so you can verify results or work manually when you prefer.
The Conduit Bending App
Conduit Bending by xNeat is a free iOS app built for electricians who bend conduit daily. It handles the math for 16 bend types and stores bender profiles so you don't have to remember deduct values for every pipe size.
What It Covers
| Feature | Details |
|---|---|
| Bend types | 16 total: offsets, 3-point saddles, 4-point saddles, 90-degree stubs, back-to-back 90s, kicked 90s, rolling offsets, corner bends, parallel bends, and more |
| Conduit types | EMT, IMC, and Rigid in sizes from 1/2" to 4" |
| Bender library | Pre-loaded profiles for Ideal, Klein, Gardner Bender, Greenlee, and other brands with correct deduct, radius, and gain values |
| Measurement output | Feet-inches-fractions (the format you mark on conduit) plus metric |
| Fraction calculator | Built-in calculator for adding, subtracting, multiplying, and dividing fractions |
| Offline | Works without cell service or Wi-Fi |
| Price | Free download, premium features via in-app purchase |
| Rating | 4.7/5 stars (402 ratings on the App Store) |
See all features in detail or read the comparison of top bending apps to see how it stacks up against QuickBend, Conduit Bender Elite, and others.
Free Online Calculators
Every calculator below runs in your browser with no login or download required. Enter your measurements and get results in feet-inches-fractions. All 16 bending calculators match the formulas used in the app.
Bending Calculators
- Offset Bend Calculator - mark spacing and shrink for any offset angle
- Rolling Offset Calculator - 3D offsets with rise and roll
- 3-Point Saddle Calculator - center and outer mark placement
- 4-Point Saddle Calculator - double-offset saddle marks
- 90-Degree Bend Calculator - stub-up mark from deduct
- Back-to-Back 90 Calculator - two 90s on one stick
- Kicked 90 Calculator - 90 with a built-in offset
- Parallel Offset Calculator - spacing for side-by-side conduits
- Conduit Shrink Calculator - shrink compensation for any offset
- Bend Multiplier Calculator - multiplier and shrink for any angle
- Degrees per Inch Calculator - segment bending for large radius
- Gain and Deduct Calculator - gain values for cut length
- Corner Bend Calculator - bends around corners
- Cut Length Calculator - total conduit needed for a run
- Wire Pull Calculator - pulling tension estimates
- Conduit Fill Calculator - NEC fill percentage and wire count
Browse all calculators on the calculator hub.
Quick Reference Tables
These are the tables that the calculators use internally. Bookmark this page for a quick lookup when you don't need a full calculation.
Deduct Values (Stub-Up)
| EMT Size | Deduct | Bend Radius | Min. Stub |
|---|---|---|---|
| 1/2" | 5" | 4" | 5" |
| 3/4" | 6" | 4-1/2" | 6" |
| 1" | 8" | 5-3/4" | 8" |
| 1-1/4" | 11" | 7-1/4" | 11" |
Offset Multipliers
| Angle | Multiplier | Shrink/Inch | Shrink Constant |
|---|---|---|---|
| 10° | 5.76 | 1/16" | 0.0625 |
| 15° | 3.86 | 1/8" | 0.132 |
| 22.5° | 2.61 | 3/16" | 0.199 |
| 30° | 2 | 1/4" | 0.25 |
| 45° | 1.41 | 3/8" | 0.414 |
| 60° | 1.15 | 1/2" | 0.577 |
For the full breakdown of how multipliers are derived and worked examples, see the Bending Multiplier Chart.
Gain Values (90-Degree Bends)
| EMT Size | Deduct | Radius | Gain |
|---|---|---|---|
| 1/2" | 5" | 4" | 3-3/4" |
| 3/4" | 6" | 4-1/2" | 4-7/8" |
| 1" | 8" | 5-3/4" | 6-15/16" |
| 1-1/4" | 11" | 7-1/4" | 10-5/8" |
The gain formula is: Gain = (2 x Deduct) - (Radius x 1.5708). For IMC and rigid values, use the Gain and Deduct Calculator.
Additional Resources
- Conduit Bending Guide - formulas, charts, and a learning path for every bend type
- Bending Formulas and Deduct Charts - detailed formula reference with worked examples
- How to Bend Conduit - step-by-step instructions for beginners
- Conduit Fill Chart - NEC Chapter 9 wire counts by conduit size
- EMT vs Rigid vs IMC Conduit - compare conduit types and specs
- Best Conduit Bending Apps (2026) - side-by-side app comparison
- NFPA 70 (NEC) - official electrical code for conduit requirements
- EC&M: Basics of Bending Conduit - trade publication bending tutorial
- Mike Holt: Hand Bending Reference - bending reference from Mike Holt
Frequently Asked Questions
Is there a free conduit bending calculator?
Yes. Conduitbending.com offers 16 free online calculators for offsets, saddles, 90-degree bends, shrink, multipliers, gain/deduct, conduit fill, and more. The Conduit Bending iOS app is also free to download and works offline on the job site.
What does the Conduit Bending app do?
The Conduit Bending app calculates bending marks for 16 bend types including offsets, saddles, 90-degree stubs, kicked 90s, rolling offsets, and corner bends. It includes a bender library with profiles for EMT, IMC, and rigid conduit from 1/2" to 4", a built-in fraction calculator, and support for both imperial and metric measurements.
Do I need an app if I already know the formulas?
Knowing the formulas is valuable, but an app eliminates arithmetic errors and saves time. It's especially useful for parallel bends (where each conduit needs different mark spacing), non-standard angles (where you'd need a scientific calculator for the cosecant), and cut-length calculations that combine gain, shrink, and multiple bends in one run.
Can I use these calculators for rigid and IMC conduit?
Yes. The online calculators and the Conduit Bending app support EMT, IMC, and rigid conduit. Each conduit type has different bend radii and deduct values. The app's bender library includes profiles for all standard sizes from 1/2" to 4" across all three conduit types.
What is the most useful conduit bending calculator?
The offset bend calculator gets the most use because offsets are the most common bend type after 90-degree stubs. It calculates mark spacing, shrink compensation, and total conduit length for any offset angle. The 90-degree bend calculator and conduit fill calculator are close seconds.
