Electrical takeoff software: four ways to count a plan set

An electrical takeoff is the list of quantities an estimator pulls from the drawings before pricing: devices, fixtures and gear counted by type, and conduit and wire measured by length. Takeoff software speeds up the counting in one of four ways: clicking each symbol, searching from one symbol you select, counting from the legend across the whole set, or detecting everything with an AI model. The difference is how much setup each device type needs and how you check the result.

By Agustín Policano, founder of AmpCount, which makes one of the tools described here. Facts about other products link to the vendor's own pages, checked November 1, 2026.

What gets counted

Receptacles by type: duplex, quad, GFCI, floor boxes, dedicated circuits
Switches by type: single pole, three-way, dimmers, occupancy sensors
Light fixtures by type tag (A1, B2, X1) and emergency or exit units
Fire alarm, data and low voltage devices, when they're in your scope
Panels, disconnects, transformers and other gear

What gets measured

Conduit by size and type, including branch runs and feeders
Wire by size and insulation, home runs and pulls
Cable tray, raceway and specialty runs
Allowances for what isn't drawn: boxes, fittings, supports

Counts are drawn on the plans; most lengths aren't. That's why the two halves are handled differently by software, and why a tool can be fast at one and silent on the other. When you size the runs you measured, the conduit fill, box fill and voltage drop calculators cover the NEC checks.

The four ways software counts

Method	How it works	Examples	Setup per device type	What you review
Click to count	The estimator clicks every device on every sheet, one type at a time.	Count tools in most takeoff and PDF software	None, but every device is a click	Your own clicks, usually with a second pass
Search from one symbol	You select one example; the software finds similar drawings and you accept the results.	Bluebeam VisualSearch¹, PlanSwift Auto Count², On-Screen Takeoff Auto Count (up to 20 pages at a time)³, Togal.AI Image Search⁴, Countfire Smart Select⁵	One selection and one review per type	Each result set, plus a look for misses
Count from the legend	The software reads the legend, then matches every symbol type on every sheet in one pass.	AmpCount	None; the legend is read once	One list of uncertain marks and a fixture schedule check
AI detection and routing	A trained model detects devices and fixtures and can lay out conduit and wire.	Drawer AI⁶	None	Detections and routing, with the vendor's QA tools

Examples are what each vendor describes on its own pages, checked November 1, 2026. Several products offer more than one method.

Where the hours go

Take a tenant fit-out with 14 device and fixture types across six power and lighting sheets. Clicking means every device, on every sheet. A search-based tool turns that into 14 selections, 14 result sets to review and a pass to catch what the search missed. Counting from the legend turns it into one upload and one review list. None of the methods removes the review, which is why vendors say so themselves: Togal.AI writes that the estimator “still classifies items, reviews the takeoff, and makes the pricing calls”¹⁰, and Countfire that “all counts are verified by you before the bid goes out.”¹¹

Those hours are expensive. The median cost estimator at an electrical contractor earned $44.67 an hour in May 2025⁷, and wages are 69.5% of total compensation in construction⁸, which puts the loaded hour near $64. They're also hard to replace: 72% of construction firms with estimating openings report difficulty filling them⁹. To put your own numbers in, use the ROI calculator.

A takeoff that holds up, step by step

Confirm the set: the sheet index, the latest addenda, and which sheets are electrical. Superseded sheets are a classic source of double counts.
Read the legend and general notes: every symbol, mounting heights, keyed notes that add devices without drawing them.
Read the fixture schedule: each type tag, and the quantity column if the engineer included one.
Count devices and fixtures by type, per sheet, and per area or phase if the bid breaks out that way.
Handle typicals: a room drawn once and marked “typical of 6” is counted once and multiplied. Check the multiplier against the plan.
Reconcile fixture counts against the schedule, and find the sheet behind any difference.
Measure conduit and wire, or apply the assemblies and allowances your shop uses.
Export the quantities per drawing, with your item codes, into your estimating software, or into a takeoff sheet in Excel if you still price by spreadsheet.

Where counts usually go wrong

Furniture or architectural symbols on other layers that look like devices and get counted.
Rotated or mirrored symbols along vertical walls that a search doesn't match.
Typical rooms counted once and never multiplied, or multiplied twice.
Devices called out in keyed notes but not drawn.
A scanned sheet inside an otherwise vector set, where symbol matching quietly stops working.
Fixture counts that never get compared with the schedule until the supplier quote disagrees.

AmpCount was built around this list: it filters to electrical layers when the PDF has them, matches symbols in every rotation and mirrored, flags scanned sheets instead of guessing, keeps anything that isn't an exact match out of the count until you confirm it, and checks fixtures against the schedule. It doesn't measure conduit or wire. See how it works and which plan sets it reads best.

Choosing takeoff software

Start from where you price. If your shop runs Accubid, McCormick or IntelliBid, you need a takeoff tool that gets quantities into it, not a second estimating system. For Accubid shops, the AmpCount and Accubid comparison shows where a legend-based count sits next to the suite instead of replacing it. The electrical estimating software guide lists 14 tools with published prices, and the comparisons go tool by tool. If AI is the deciding factor, read what AI takeoff software actually does first.

Keep reading

Sources

Product names are trademarks of their owners. AmpCount is not affiliated with any vendor on this page.