How many pages are you actually sitting on?
Every scanning project starts with one number, and most people guess it wrong. Here is how to size the job from what you can already see: the files, the boxes and the cabinets, before a single lid is lifted.
It all comes down to one number
Every digitisation project starts with the same question: how many pages are there? That one number decides the budget, the timeline and whether there is a business case at all. Get it wrong and the quote is wrong, the schedule slips, and the return on investment you promised never arrives.
The good news: you do not need to open every box to answer it. You need a tape measure, a few sensible figures and ten minutes of arithmetic.
Estimate first, then sample
You cannot count every page, and you do not need to. The method is simple: estimate the total from the containers you can see, then open a few of them to check the estimate holds.
You sample because paper is not consistent. The same lever-arch file might hold 250 pages in one office and 450 in the next, depending on paper weight, dividers, plastic sleeves and how hard someone leaned on the lever. A number that looks exact on a spreadsheet can be out by half in the real world. Sampling keeps you honest.
Count the containers, apply a figure
The fastest estimate multiplies the number of each container by an average page count. Walk the archive, count what is on the shelves, and apply these working figures:
| Container | Working figure | Notes |
|---|---|---|
| Lever-arch file | ~300 pages | Dense, filed pages; an overfilled file can reach 500 |
| Ring binder | ~100 pages | The standard two- or four-ring office binder |
| A4 folder or manila file | 150–200 pages | Useful when records are not boxed |
| Archive or storage box | 1,800–2,500 pages | About 2,000 is a safe planning figure |
| Banker’s box (the long one) | ~4,000 pages | Roughly double a standard box |
| Filing cabinet drawer (vertical) | ~2,750 pages | Count per drawer, not per cabinet |
| Filing cabinet drawer (lateral) | ~5,000 pages | Wider than a vertical drawer, so it holds more |
| Loose paper | ~150 pages / 25 mm | Measured as a compressed stack |
A four-drawer vertical cabinet, then, is roughly 11,000 pages. A room of forty archive boxes is roughly 80,000. You can size an entire building in an afternoon this way.
These figures are deliberately conservative. They reflect real, printed, filed documents, not a ream of fresh paper straight from the box. Filed pages carry dividers, tabs, the odd photograph and years of handling, so they sit thicker on the shelf than a paper supplier’s figures suggest.
When the container has no standard, measure it
Some archives store paper in boxes with local names and no standard size, a “D1” or a “D2” that means something only to the company that ordered them. A name tells you nothing about capacity, so measure instead.
Take the usable depth of paper in the box and multiply by roughly 150 pages for every 25 mm (one inch). A box holding a 300 mm stack of paper is about 1,800 pages. A 400 mm stack is about 2,400. Measure one filled box and you have a figure for all of them.
This is the honest fallback for anything odd: unusual boxes, open shelving, a strongroom stacked to the ceiling. If you can measure the paper, you can estimate the pages.
A page is not an image
Here is the trap that catches people at quoting time. A page count is not an image count. If a meaningful share of your sheets are printed on both sides, every double-sided sheet becomes two scanned images. Storage, indexing and scanning time all follow the image count, not the sheet count.
So as you sample, note what is single-sided and what is duplex. It costs nothing now and saves an awkward conversation later.
Pages are not the whole cost
Two boxes with the same page count can take very different amounts of work. Staples, paper clips, sticky notes, torn pages, mixed paper sizes, and any requirement to put a file back exactly as it was found, all add time that a page count alone will never show.
This is why the sample matters as much as the count. Opening ten boxes tells you whether the archive is clean and loose or dense and stapled, and that is the difference between a comfortable quote and a painful one.
The approach, start to finish
Count every container you can see. Apply the figures above. Measure anything that does not fit a standard type. Then open a small sample of boxes, from loosely packed to average to dense, and adjust the total to match what you actually find. Note single versus duplex while you are in there.
That is the whole method. It is quick, it is defensible, and it turns a shelf of paper into a number you can plan and budget against.
From a shelf of paper to a plan
This is exactly how we scope a project at SmartImage. You tell us what is on the shelves; we turn it into a page count, a timeline and a plan you can hold us to. We have done it across more than 500 million pages since 2014, so the figures above are not theory. They are what the shelves actually hold.
When you are ready to turn that paper into something your business can use, we are a good place to start.