Pipe Bend Calculator  ·  Pro Tool

Accurate bends.
Stored K-factors.
Every time.

K-factor and springback values stored per material and OD combination. Multi-bend sequences with running developed length and straight segment outputs. No more lookup tables or formula errors.

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Pipe Bend Calculator · Multi-Bend Sequence
Material
Mild Steel
OD (in)
2.000
K-Factor — saved
0.420
Springback — saved
2.5°
#AngleBA (in)StraightDev. Length
190.0°6.597"12.000"18.597"
245.0°3.298"8.000"29.896"
390.0°6.597"6.000"42.493"
Total Developed Length42.493"
Stock Length Required≥ 43.0"
Total Springback Add7.5°
✓
K-factor and springback stored per material and OD
✓
Multi-bend sequences with running developed length
✓
No more lookup tables or formula errors on the floor
Saved
K-factor per material & OD
Multi
Bend sequences supported
→ Nester
Export to Linear Nester
In / mm
Inch and metric
The Problem

Re-entering K-factor every time isn’t a workflow — it’s a liability.

Every time you switch materials or tube sizes, most calculators make you look up and re-enter K-factor and springback. One wrong number and your parts are scrap. FabEngineer Pro stores those values per material and OD — and loads them automatically.


✓
K-factor stored per material + OD
Set it once. Every time you select that combination, it loads automatically.
✓
Springback compensation built in
Add springback in degrees. It factors into your overbend angle automatically.
✓
Multi-bend sequences
Add bends one by one. Running developed length updates after each bend.
✓
Export to Linear Part Nester
Push cut-length results to the nester to optimize your stock usage.
Saved K-Factor Library
Mild Steel · 2.000" ODK=0.420 · SB=2.5°
Mild Steel · 1.500" ODK=0.435 · SB=2.0°
Stainless · 2.000" ODK=0.440 · SB=3.5°
Aluminum · 1.000" ODK=0.450 · SB=1.0°
DOM · 1.750" ODK=0.415 · SB=2.8°
Bend Allowance Formula
BA = (π / 180) × Angle × (R + K × T)
R = bend radius (CL)  ·  K = K-factor  ·  T = wall thickness
How It Works

Set your material once. Calculate every bend from there.

1

Select Material & OD

Choose material type and tube OD. If used before, K-factor and springback load automatically from your saved library.

2

Enter Bend Sequence

Add each bend angle and straight segment length. Running developed length updates after every entry.

3

Get Results & Export

Total developed length, per-bend allowances, and straight segments. Push cut lengths to the Linear Nester with one click.

Part of the Pro Suite

The Pipe Bend Calculator connects to your full quoting workflow.

→ Linear Part Nester

Export bend part cut lengths to the nester. Optimize stock usage on tube and pipe-heavy jobs.

→ Bottom-Up Estimator

Import bend parts into a Bottom-Up quote. Add processing, welding, and coating for the full job cost.

→ Customer Quote Generator

The full workflow ends with a branded PDF quote ready to email to your customer.

★★★★★
"The DXF estimator alone saves me 30 minutes per quote. I used to trace cut lengths by hand — that’s not an exaggeration. This tool pays for itself in the first week."
Early Access User · Custom Fab Shop · Texas
$29/month  ·  or $249/year  ·  7-day free trial

Calculate bends accurately.
Every material. Every job.

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