Comparing piping takeoff software: model, isometric, PDF or outsourced?

Metriq MTO · Published 23 Oct 2026 · Updated 29 Oct 2026

Start from the file you actually have

Lists of “the best MTO software” tend to compare products that do not do the same job. A tool that reads the bill of materials printed on an isometric cannot help if all you received is a Navisworks model, and a model take-off is no use if the job is a set of scanned drawings. So the first question is not which product, but which input: a 3D model, isometrics, 2D plans, or nothing you have time to measure.

For a UK mechanical or building services contractor at tender, the file is often a federated Navisworks NWD. The designer keeps the source project; the contractor gets the coordination model and a deadline. That is the case this site is about, but the table below is honest about the others.

The approaches side by side

Each route below names products only as their own pages describe them, checked in October 2026. Their prices are on those pages; we do not repeat them here, because they change.

Six questions to ask any piping MTO tool

1. Where do the quantities come from? Properties published in a model, a table printed on a drawing, or lines traced by hand. Each fails in its own way, so know which you are buying.
2. What happens to what it cannot read? A good take-off lists it. A take-off with no “not resolved” list is usually hiding one.
3. How are copies handled? In a federated model the same run can be present twice; on a drawing set the same isometric can be issued twice. Ask how the tool keeps copies out of the price.
4. What does the export look like? Ask for a sample file. Check the units, that reducing items carry both sizes, and whether it can follow your client’s template.
5. What happens on a revision? The useful answer is a list of what changed, not a fresh take-off to compare by eye.
6. Where do your files go? Client models and drawings are confidential. Ask where they are stored and processed, and how they are deleted.

When is a 3D model take-off right?

When you receive the model, the model carries property data, and the take-off has to happen inside the tender window. The quantities come from what the designer published, so they are only as complete as the model: supports, insulation or small-bore runs that were never modelled have to be priced another way. It is the wrong choice for a model of plain meshes with no properties: there is nothing to count, and an honest tool says so. Metriq MTO is a model take-off for the NWD a contractor receives at tender; Navisworks Quantification, below, is the in-house route from the same file. Before you trust either, run the checks in the Navisworks piping takeoff guide.

When is Navisworks Quantification in house right?

When you already own Navisworks and have a mature catalogue and search set library for the model family in front of you, or when the take-off covers more than piping. On the tenth project of the same kind, a good template is quick. Plug-ins add grouping and export inside Navisworks: Productivity Toolbox, for example, describes a quantity take-off module that sums quantities for each group and exports to Excel or CSV, runs in Manage and Simulate and is installed from the Autodesk App Store (Productivity Toolbox). The grouping rules stay yours to define. Our Navisworks Quantification comparison goes through it row by row, with the alternatives to Quantification.

When is an isometric reader right?

When the isometrics are issued and carry their bills of materials, typically later in a project or for a fabrication shop. At tender, before isos exist, there is nothing for it to read. PipeTakeoff says it reads the quantities printed in the bill of materials on each isometric, scanned sheets included, shows every proposed row beside its drawing for an estimator to approve, compares a revised drawing with the last one, and exports to XLSX or CSV (PipeTakeoff). Pathnovo says it reads 2D isometrics, scanned, hand-drawn or as PCF and IDF files, and returns fabrication outputs such as a weld schedule, a cutting list and a bill of materials, as a managed service (Pathnovo). Both read what a drawing prints, so a drawing that is wrong or missing gives a row that is wrong or missing.

When is a 2D PDF take-off right?

When there is no model and no isometrics: early-stage drawings, small jobs, or building services layouts issued as PDFs. Lengths depend on scale and on the person tracing them, so build in time to check. Bluebeam describes PDF markup with measurement tools for length, area, perimeter and counts, licensed per user by annual subscription (Bluebeam). PlanSwift describes on-screen takeoff by pointing and clicking on PDF, CAD and image files, with material, labour and waste assemblies so the estimate builds as you measure, and counts of plumbing fixtures and runs (PlanSwift). Both are general construction tools; piping is one trade among many.

When is an outsourced bureau right?

When the work exceeds your capacity and a turnaround of days is acceptable. Some software vendors offer it too: PipeTakeoff and Pathnovo both describe a done-for-you take-off next to their tools. You still own the check, so ask for the take-off line by line, in your client’s format, with a list of what could not be measured and the drawing or model behind each row.

When are the design tool’s own reports right?

If you are the designer and hold the Plant 3D, Revit or other source project, its own reports are the natural first source: Plant 3D reports and isometric bills of materials, Revit schedules. The trouble starts when you receive only the NWD. See Plant 3D piping MTO when you only have the NWD.

Using more than one approach on a bid

Most real bids mix inputs. The piping that is modelled comes out of the NWD; what the model leaves out, such as supports, insulation or small-bore runs drawn only on a layout, is measured from drawings or priced as an allowance; and once the job is won, the issued isometrics drive fabrication. None of that is unusual. What matters is that every quantity says where it came from, so a reviewer can tell a measured row from an allowance.

• Keep the sources apart. Put model quantities, drawing quantities and allowances on separate rows or sheets, never in one merged total.
• Reconcile when the isometrics arrive. Compare the isometric bills of materials with the model take-off by line and size. The differences are either changes to the model since tender or items the model never carried.

The cost that is not on the price list

Licence and subscription prices are easy to compare. The estimator’s time is not, and it is usually the larger cost. A tool that is cheap per seat but needs a day of set-up for every new model family can cost more per bid than one with a higher list price and no set-up. When you compare, price a typical month: the number of bids, the revisions each one brings, and the hours of set-up and checking each approach needs, not only the licence.

Where Metriq MTO fits

Metriq MTO is a model take-off for the NWD case. It works from Navisworks NWD files of up to 300 MB, exported from Plant 3D, Revit or DWF piping models, and returns:

• A line-based Excel workbook: pipe in metres or feet, fittings, flanges and valves in each. On the monthly plan it follows your client’s own MTO template.
• A PDF report you can send with the bid: what is in the totals, and what was left out and why.
• Rows you can check: the model objects behind a row open in the 3D view.
• Copies kept out: exact copies of the same object are counted once.
• Gaps listed: anything the model cannot evidence is listed, never invented.

It does not read PDFs or isometrics, it does not connect directly to estimating software (the output is Excel you import), and it quotes no accuracy percentage. It costs £200 a month with unlimited users and 15 models a month, or £100 for a single model, both plus VAT or local tax. See the piping MTO software page for the detail, download the sample take-off to see the output, or start from the free piping MTO Excel template if you are measuring by hand. For the Navisworks route step by step, read how to get a piping MTO from an NWD. Who sells it and where the data is kept is on about Metriq MTO.

Who should not buy Metriq MTO

• You have no model. With PDF drawings or isometrics only, a 2D take-off tool or an isometric reader is the right buy.
• The model has no property data. Plain meshes give no rows to count, and Metriq MTO will tell you so rather than estimate.
• You need prices, labour or unit rates. Metriq MTO has no price library; your estimating tool does that part.
• You need fabrication data. Weld counts, spool numbers and cut lists come from issued isometrics, not from the NWD.
• The take-off is mostly not piping. Ductwork, electrical and structure are outside it.
• The federation cannot be split. Each NWD can be up to 300 MB; a larger one is measured by discipline, as separate models.
• You need an accuracy percentage on paper. None is quoted; the model objects behind a row open in the 3D view instead.

Questions

Sources

1. How to evaluate AI pipe takeoff software (PipeTakeoff)
2. Piping MTO software comparison (Pathnovo)
3. Bluebeam pricing (UK) (Bluebeam)
4. PlanSwift takeoff and estimating software (PlanSwift)
5. Productivity Toolbox for Navisworks (Productivity Toolbox)
6. Navisworks Quantification user guide (Autodesk Navisworks help)
7. Functionality differences between Navisworks Manage and Simulate (Autodesk support)
8. Navisworks: subscription options and current UK prices (Autodesk)

Links checked in October 2026. Menu names and pages can move between releases.