Best Conduit Filler Apps

40+ iOS apps curated and reviewed

4.2 avg rating
15 free apps
Updated May 2026

If you already know Conduit Filler, this is the deeper bench. 40+ conduit filler apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Conduit Filler

Conduit Filler#1

Conduit Filler by Zsolt Giczi

The electrician's helper
Editor's Choice
💼 Business
3.5(16 ratings)
FreeIn-App Purchases
Conduit Filler screenshot 1
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Conduit Filler screenshot 4
Conduit Filler screenshot 5
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This app assists electrical tradespeople with conduit fill and sizing calculations for various wire gauges. It supports US, Canadian, and UK electrical codes, offering a 7-day free trial before a monthly or yearly subscription.

Southwire® Conduit Fill Calc#2

Southwire® Conduit Fill Calc by Southwire Company

Strong Contender
🔧 Utilities
4.5😊(746 ratings)
Free
Southwire® Conduit Fill Calc screenshot 1
Southwire® Conduit Fill Calc screenshot 2
Southwire® Conduit Fill Calc screenshot 3

This tool assists electricians, engineers, and contractors in determining the correct conduit size based on NEC guidelines. It calculates conduit fill percentages and jam probability, saving time compared to manual calculations.

What We Love

  • 🚀 Quick and easy calculations
  • 👍 User-friendly interface with spin wheel controls
  • 📊 Shows actual fill percentage and NEC compliance
  • 🔧 Ability to add multiple wire sizes simultaneously

Room to Improve

  • ⚠️ Accuracy issues reported by multiple users
  • ❌ Limited wire gauge options (missing 16 & 18 AWG)
  • 🔄 Changing conduit type erases conduit size
Prysmian Group Conduit Fill#3

Prysmian Group Conduit Fill by Prysmian Group

Electrical Conduit Fill
Worth Considering
📊 Productivity
3.0(2 ratings)
Free
Prysmian Group Conduit Fill screenshot 1
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This electrical conduit fill calculator helps engineers, contractors, and electrical professionals quickly determine the minimum conduit size according to the National Electrical Code, saving time on complex calculations. Try it out to easily find answers for your conduit fill needs.

More Conduit Filler apps to explore

4
Conduit Mate: Pipe Bender
Conduit Mate: Pipe Bender
Conduit Mate: Pipe Bender
Offset, Saddle, 3D Visualizer
Free
🔧 Utilities
(0)
5
Conduit Bender Elite - Calc
Conduit Bender Elite - Calc
Conduit Bender Elite - Calc
Calculator for Electricians
$7.99

This app is a specialized calculator for electricians to simplify conduit bending calculations. It offers detailed diagrams and step-by-step guidance for various bend types, helping users save time and focus on installation. Users can customize settings for different conduit sizes and units of measurement.

Conduit bending calculationsDiagrams and step-by-step helpMultiple bend types supported
🔧 Utilities
(1.6K)
free with in-app purchases
6
Conduit Fill Capacity Calculator
Conduit Fill Capacity Calculator
Conduit Fill Capacity Calculator
by TE Connectivity Corporation
Free

Easily determine the maximum number of data cables that can fit within a conduit of a specific size. Input your conduit dimensions and desired fill ratio to get an instant calculation.

Calculate maximum cable capacitySelect conduit sizeChoose fill ratio
🔧 Utilities
(1)
free
7
NEC Box & Conduit Calc
NEC Box & Conduit Calc
NEC Box & Conduit Calc
NEC Box & Conduit Fill
Free

Calculate electrical box and conduit fill accurately according to the NEC. This app provides instant, reliable calculations for electricians, contractors, and students, saving time on job sites. It offers support for various box and conduit types, conductor sizes, and includes wire volume data.

Box fill calculationsConduit fill calculationsWire volume data
🔧 Utilities
(17)
free with in-app purchases
8
Conduit Fill
Conduit Fill
Conduit Fill
quickly calculate conduit fill
$4.99

This app helps electricians quickly calculate conduit fill based on the latest NEC or CEC codes. Easily add various wire types and quantities to determine the minimum required conduit size.

NEC and CEC code calculationsSupport for up to 1000 wiresSelect from different wire types
🔧 Utilities
(2)
paid
9
Derated: Conduit Fill
Derated: Conduit Fill
Derated: Conduit Fill
Fill and Derating Calculator
$1.99

This app simplifies complex electrical calculations for electricians. It allows real-time calculation of conduit fill and wire ampacity derating, adhering to NEC guidelines. Results are accurate and easily shareable for collaboration or client communication.

Real-time conduit fill calculationSimultaneous wire ampacity deratingAdheres to NEC guidelines
📊 Productivity
(5)
paid
10
Conduit Bending - Bend Calc
Conduit Bending - Bend Calc
Conduit Bending - Bend Calc
Electricians Bender Calculator
Free
$4.99 | 100% OFF

This tool helps electricians and DIY enthusiasts perform accurate conduit bending calculations. It provides instant measurements for various bends, supports multiple conduit types, and offers step-by-step instructions with visual aids. Save time and reduce material waste with precise, on-the-go calculations.

Calculate common bends instantlySupports all standard conduit typesStep-by-step bending instructions
📊 Productivity
(2)
free
11
RIGID: Conduit Bending Calculator
RIGID: Conduit Bending Calculator
RIGID: Conduit Bending Calculator
by Bret Hardman
$2.99

This app is a professional tool for electricians and technicians, offering advanced calculations for various conduit bending scenarios. It supports multiple bend types, allows for custom bender and shoe specifications, and can share bending details via text.

Advanced bending calculationsSupports multiple bend types (90, offsets, saddles)Customizable bender and shoe specifications
📊 Productivity
(14)
paid
12
FILL ◦ Conduit Fill Calculator
FILL ◦ Conduit Fill Calculator
FILL ◦ Conduit Fill Calculator
NEC 2023 Conduit Fill by Code
Free
🔧 Utilities
(2)
13
BendCalc: Conduit Bending
BendCalc: Conduit Bending
BendCalc: Conduit Bending
Offset, saddle & fill calc
Free
🔧 Utilities
(5)
14
Pipe N Wire
Pipe N Wire
Pipe N Wire
Conduit Fill
$1.99

This tool helps electricians quickly calculate the correct conduit size based on wire types, gauges, and desired fill percentages, adhering to NEC standards. It offers a streamlined interface for field use and planning, with options to save calculations and override recommendations.

Conduit fill calculationsSupports all standard wire typesSmart conduit selector
📊 Productivity
(9)
paid
15
Conduit Fill Pro
Conduit Fill Pro
Conduit Fill Pro
Capacity Calculator & Code
Free
🔧 Utilities
(0)
16
Cerrowire Calculators
Cerrowire Calculators
Cerrowire Calculators
by Cerro Wire LLC
Free

Calculate conduit fill and size based on NEC guidelines for copper and aluminum building wire. Determine the maximum number of conductors for a given raceway or the required raceway size for specific conductors.

NEC conduit fill calculationsConduit sizing for conductorsSupports copper and aluminum wire
🔧 Utilities
(5)
free
17
Easy Bend: Conduit Calculator
Easy Bend: Conduit Calculator
Easy Bend: Conduit Calculator
Offset, Saddle & 90° Bends
Free
🔧 Utilities
(2)
18
FieldVolt Electrical
FieldVolt Electrical
FieldVolt Electrical
Electrical Field Calculator
Free
🔧 Utilities
(1)
19
SLD Sizer for Engineering
SLD Sizer for Engineering
SLD Sizer for Engineering
Single Line - One Line Diagram
Free

This reference tool helps electrical engineers, designers, and contractors determine appropriate wire and conduit sizes. It provides minimum requirements based on selected load and NEC data for quick design verification.

Wire and conduit sizingLoad-based calculationsNEC data compliance
🔍 Reference
(7)
free
20
BendPro: Conduit Bending
BendPro: Conduit Bending
BendPro: Conduit Bending
EMT Bend Calculator
Free
🔧 Utilities
(0)