Construction glossary · Estimating Concepts

What is a takeoff in construction?

A takeoff in construction is the process of measuring and counting every item of work from the project drawings, producing quantities such as 14 doors, 240 lf of partition, or 1,800 sf of slab. It is the first step in building an estimate: the takeoff establishes how much work there is, and the estimator then applies unit costs to those quantities to price the job. It is also called a quantity takeoff (QTO) or material takeoff (MTO).

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Updated September 2026 · Reviewed by the Ruh construction team

Output quantities by itemFeeds the price bookUnits LF, SF, CY, EA

The definition

Takeoff Meaning in Construction and Estimating

A takeoff in construction means measuring and counting every scope item in a drawing set so it can be priced. In estimating, it is the quantity step that comes before pricing. The spellings takeoff, take-off, and take off, along with the plural take offs, all name the same quantity survey. Estimators perform takeoffs from plans, elevations, sections, schedules, and details, working trade by trade and usually organized by CSI division. The term shows up everywhere in preconstruction: bid invitations ask subs to perform their own takeoff, scope sheets reference takeoff quantities, and buyout meetings compare the GC's takeoff against sub proposals. General contractors, subcontractors, and suppliers all run takeoffs, sometimes on the same drawing set, which is why quantities get compared and challenged. The mistakes new estimators make are predictable: scaling dimensions off sheets marked "do not scale" instead of using written dimensions, missing addenda that changed the drawings after the takeoff started, skipping waste factors, double counting work shown on both a plan and a detail, and quantifying only what the drawings show instead of what the specs also require. A clean takeoff is traceable, meaning every quantity points back to a sheet number and a measurement an auditor could repeat.

How it is measured

Takeoff quantities carry one of four measurement types: count (each, abbreviated ea), length (linear feet, lf), area (square feet, sf, or square yards, sy), and volume (cubic yards, cy). Weight (tons or lbs) covers structural steel and rebar. The estimator pulls counts from schedules (door, window, fixture), lengths and areas from scaled floor plans, and volumes by combining plan area with thicknesses from sections and details. Each quantity is logged against the sheet it came from, then extended with a waste factor where the material demands it (drywall, concrete, lumber). The finished takeoff lands in a spreadsheet or estimating platform as the quantity column that unit costs get applied to.

What Is a Take Off Sheet?

A take off sheet, also called a takeoff spreadsheet or construction takeoff spreadsheet, is the tabulated record of the takeoff, with one row per scope item. It has columns for the item, the source plan sheet, the unit (ea, lf, sf, cy), the measured quantity, the waste factor, and the carried quantity; the carried quantity becomes the quantity column that unit costs are applied to.

The table below renders this page's own worked example as a take off sheet. Every row traces to the drawing it was measured from.

Item	Source sheet	Unit	Measured	Waste	Carried
Interior partition drywall, both faces	Floor plan	sf	4,320	10%	4,800
Slab patch, 4 in thick	Slab plan	cy	22.2	rounded up	24
Doors	Door schedule	ea	14	none	14

These quantities are the ones from the worked example below, and the carried column is what unit costs get applied to.

Takeoff by Trade: Lumber, Earthwork and Steel

A lumber takeoff counts studs, plates, and headers from framing plans and wall lengths. It carries them as pieces or board feet with a waste factor, using the same lf-to-quantity logic as the partition line in the worked example.

An earthwork takeoff measures cut and fill volumes in cy from existing versus proposed grades on the grading plan. It uses the 27 cf per cy conversion already used in the worked example.

Structural steel and rebar are carried by weight in tons or lbs, as the measurement section already says. The count of pieces still comes from the framing plans and schedules.

Worked example

Construction Takeoff Example: From Takeoff to Estimate

Take a small tenant improvement. The floor plan shows 240 lf of new interior partition at 9 ft tall, the door schedule lists 14 doors, and the slab plan shows a 1,800 sf slab patch at 4 in thick. Partition drywall: 240 lf x 9 ft = 2,160 sf of wall, both faces = 4,320 sf, plus 10 percent waste = 4,752 sf, carried as 4,800 sf. Concrete: 1,800 sf x 0.333 ft = 600 cf, and 600 cf divided by 27 = 22.2 cy, carried as 24 cy to cover waste and grade variation. Doors: 14 ea, a straight count. At illustrative unit costs of $2.40 per sf for drywall hung and finished, $400 per cy for concrete in place, and $1,450 per door installed, the lines extend to 4,800 sf x $2.40 = $11,520, 24 cy x $400 = $9,600, and 14 x $1,450 = $20,300. Every one of those numbers traces back to a sheet in the set. Summed, the three extensions put $41,420 of direct cost on the estimate. That is how a takeoff feeds estimating: quantities first, unit costs against them, markups later.

How Ruh handles it

How Ruh Handles Takeoff.

Ruh automates the takeoff step itself: it reads the contractor's drawing set, counts and measures the scope (door counts, lf of partition, sf of slab), and prices those quantities against the contractor's own price book rather than generic cost data. The result is a line-item draft estimate handed to the estimator, who reviews the quantities, adjusts assumptions like waste factors and means and methods, and signs off. The measuring gets faster, but the professional judgment stays with the estimator.

On this page: What Is a Take Off Sheet? · Construction Takeoff Example: From Takeoff to Estimate.

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Takeoff: Frequently Asked Questions

What is the difference between a takeoff and an estimate?+

The takeoff is the quantity step: it tells you how much work there is, in units like ea, lf, sf, and cy. The estimate is the pricing step: it applies labor, material, and equipment unit costs to those quantities, then adds markups such as overhead, profit, bond, and contingency. You cannot have a reliable estimate without a reliable takeoff, because every pricing error scales off the quantity beneath it.

What do QTO and MTO stand for?+

QTO is quantity takeoff and MTO is material takeoff, and in day-to-day use they overlap heavily. Strictly speaking, a material takeoff lists only physical materials (studs, sheets of drywall, yards of concrete), while a quantity takeoff measures all work items, including labor-only scopes like demolition or finishing. Most US commercial estimators just say takeoff and mean the full quantity survey.

Do digital and AI takeoffs still need to be checked?+

Yes. Software measures faster and more consistently than a scale ruler, but the estimator still has to confirm the right drawing revision was used, the scope matches the specs and addenda, and the waste factors fit the planned means and methods. Treat an AI takeoff as a strong first pass that you verify and own, the same way you would review a junior estimator's quantities.

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Keep going: Construction Takeoff Example: From Takeoff to Estimate, read the full guide or explore AI Construction Takeoff and Estimating Software.

The Estimating Concepts Estimating Cheat Sheet

Every unit, waste factor, and conversion on one page. Free PDF.

Figures on this page are illustrative. Construction estimates depend on project-specific conditions, source documents, market pricing, and professional judgment. Ruh's AI assists the estimator and does not replace professional review: your team reviews, validates, and approves every estimate, bid, and pricing decision.

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Knowing what takeoff means is the easy half.

The number you actually need is the one from your own drawings. These two are free, take no signup, and give you something you can put straight into a bid.

Markup and MarginThe two are not the same number Cost per Square FootYour area against your rate

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3Every quantity traces back to the sheet it was measured from, so your estimator can check the work

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