A takeoff in construction is the list of quantities a trade needs to build a project, measured from the bid set: how many of each item, how many linear feet, how many square feet. It gets its name because you take the quantities off the drawings and specifications. The takeoff says what and how much. The estimate that follows it says what it costs.
Every bid starts here. A shade dealer counts shades by size, a flooring sub measures square feet by finish, a door supplier lists every opening with its frame, rating and hardware set. If the takeoff is short, the bid is short, and no amount of careful pricing fixes it.
Quantity takeoff and cost estimate are two separate steps
A quantity takeoff answers one question: what does the bid set require? It holds counts, lengths and areas, each tied to the sheet or spec section it came from. A cost estimate takes those quantities and applies material prices, labor, equipment, freight and markup.
Keep the two apart for a practical reason. A quantity can be checked against the drawings. Anyone with the same bid set should be able to find the same 42 shades or the same 1,850 SF of carpet tile, and if they can't, one of you made a mistake you can find. A price is the contractor's own judgment, based on their crews, their suppliers and how much they want the job. When the two are mixed in one spreadsheet, a wrong quantity hides behind a reasonable-looking total.
You will also hear "material takeoff" and "quantity takeoff". In most offices they mean the same thing: the measured quantities, before prices.
The units a takeoff uses
Each trade measures in the unit it buys and prices in. Getting the unit right matters as much as getting the number right.
| Unit | What it means | Typical items |
|---|---|---|
| EA | Each, a count | Shades by size, door openings, toilet accessories, extinguisher cabinets, overhead doors |
| LF | Linear feet | Resilient base, wall angle, side channels, cubicle track, crash rails |
| SF | Square feet | Acoustical ceilings by type, resilient flooring, window film by daylight opening |
| SY | Square yards (1 SY = 9 SF) | Broadloom carpet |
| Cartons, rolls, pieces | Buying units | Ceiling tile cartons, carpet tile cartons, 12' main runners, base coils |
| SET | A group of parts per opening | Weatherstripping at a door frame (head and two jambs) |
Net quantity and order quantity
Most area trades report two numbers. The net quantity is what you measured. The order quantity is net plus waste, rounded up to full cartons or rolls, plus any attic stock the spec asks for. Good practice keeps waste as a separate, visible factor instead of drawing areas a little large to cover it. That way the contractor can see the waste and change it.
Some trades have no cutting waste at all. Doors, frames, hardware and most Division 10 items are ordered to the exact count. Spares appear only when the spec calls for extra materials.
Each trade has its own measuring rules
The same window can produce three different numbers depending on the trade measuring it. A few examples:
- Window coverings are counted each and sized from the opening. The manufacturer applies its own deduction, so the takeoff never subtracts it a second time.
- Window film is measured on the daylight opening, the visible glass. Measuring the frame size instead overstates the film, a little on big panes and a lot on small lites.
- Flooring is measured net to the inside face of the wall, through door openings to the door centerline. Base is measured along the wall less door openings.
- Acoustical ceilings are measured room by room by ceiling type and height, and never run across a partition that goes to deck.
- Doors are counted by opening. A pair of doors is one opening with two leaves and one frame.
Who does takeoffs
Takeoffs are done wherever someone has to commit to a number on a bid.
- Subcontractor estimators take off their own trade before every bid.
- General contractors take off trades to check sub bids for missing scope, and to price the work their own crews do.
- Suppliers and distributors take off what they furnish. Division 08 door and hardware distributors, for example, work opening by opening from the door schedule.
- Takeoff services and freelancers do the counting for contractors who would rather spend their own time pricing, selling and running work.
Whoever does it, the job is the same: read the whole set, count everything that belongs to the trade, and say clearly what doesn't.
Manual and digital takeoffs
Manual takeoff
The traditional method is paper sheets, a scale ruler, colored highlighters and a tally pad. You mark each item as you count it, measure lengths with the scale, and work areas out by hand. It still works, and the marked paper set is a real record of what was counted. It is slow on a large set, and every dimension depends on reading the right scale off the right sheet.
Digital takeoff
Many estimators now work from PDFs in on-screen takeoff software. You set the scale on each sheet, click to count, trace to measure areas and lengths, and export the totals to a spreadsheet. It is faster, the marks stay on the drawings, and totals add themselves.
Digital tools carry the same core risk as paper. If the scale is set from a title block that doesn't match how the sheet was printed, every length on that sheet is wrong, and every area is wrong by the square of that error. A sheet measured at 1/8" = 1'-0" that was really drawn at 1/4" = 1'-0" doubles every length and quadruples every area. Symbol-counting tools help, but they can count look-alike symbols and miss items drawn without a tag. Treat an automatic count as a second count to check against, not as the answer.
When the GC shares CAD files, counts can come straight from the drawing's blocks and attributes, which removes most of the guesswork from symbols.
What a good takeoff contains
A list of totals is the least of it. A takeoff you can bid from with confidence has these parts:
- Quantities by type, broken down by floor or room so you can follow them on the drawings.
- A source on every line: the schedule row, a written dimension, or the scaled drawing, in that order of preference. A line with no source can't be checked.
- A scale check for every sheet that was measured, against the sheet's own written dimensions.
- A second count by a different method, with every difference explained.
- Scope in writing: inclusions, exclusions, items by others, N.I.C. items, and owner-furnished items.
- Spec items that add quantity: attic stock, spare units, allowances, alternates and unit prices.
- Questions for the GC for every conflict between sheets, and a field-verify list for everything the drawings don't show, such as a missing ceiling height.
- A marked-up set showing every counted item, so your estimator can check it quickly.
- A workbook with live totals you can price from.
The field-verify list deserves a word. Drawings never match the finished building perfectly, and an honest takeoff says where they fall short. A takeoff that fills every gap with an assumed number looks complete and is less useful than one that lists five heights to confirm.
To see how each of these gets checked, read how to check a takeoff for errors. If you are weighing whether to send the work out, what a takeoff service costs walks through the pricing models.
Countersheet does takeoffs this way for seven commercial trades, including window coverings, doors and frames and flooring: every item counted twice, every quantity tied to its source, back in 48 hours from complete documents. You can see the sample package or request a takeoff; the first one is free for one trade on a set under 25 pages.
Frequently asked questions
What is the difference between a takeoff and an estimate?
A takeoff lists the quantities a project needs, measured from the plans and specs. An estimate applies material prices, labor, equipment and markup to those quantities to reach a bid price. The takeoff can be checked against the drawings; the pricing is the contractor's own judgment.
Is a material takeoff the same as a quantity takeoff?
In most offices, yes. Both terms mean the measured counts, lengths and areas taken from the bid set before any prices are applied. Some people use "material takeoff" for a list ready to order from, with waste and full cartons added to the net quantities.
What documents do you need for a construction takeoff?
You need the drawings, the specifications and every addendum issued so far. The drawings give counts and sizes, the specs give products, attic stock, allowances and scope, and the addenda change both. A takeoff done without the specs or the latest addendum is incomplete.
Does a takeoff include waste?
A good one shows waste separately. The net quantity is what was measured; the order quantity adds waste, rounds up to full cartons or rolls, and adds any attic stock the spec requires. Doors, frames, hardware and most Division 10 items are ordered to the exact count with no cutting waste.
Can software do a takeoff on its own?
Software makes counting and measuring faster, but someone still has to set and check the scale, read the specs, decide what is in scope and resolve conflicts between sheets. Automatic symbol counts are useful as a second count to check against. They should not be the only count behind a bid.