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FloorCast3D
Free tool · Runs in your browser

How many pallet positions fit in your warehouse?

Set the building, pick the forklift, and read the count. The calculator packs one uniform block of single-deep selective racking into an empty rectangle using the same arithmetic the FloorCast3D desktop app applies when it suggests a layout — honest aisles at both ends of every stack, steel-to-steel conversions, and a level count taken from the top of the load, not the beam. No sign-up.

300′
200′
32′
Lift truck

9′ clear aisle · Narrow-aisle reach · 9′-6″ steel

8,832
Pallet positions
6 × 2
Levels × per bay
768
Upright frames
7,360
Load beams

32 rows · 16 back-to-back pairs · 23 bays per row · 6″ steel flue · 58″ level pitch (48″ pallet + 10″) · top of load 28′-2″

Read this as a ceiling. It lays single-deep back-to-back rack into an empty rectangle — no columns, docks, cross-aisles, offices or battery room — on 48″ × 40″ GMA pallets in 96″ bays, and it deducts no sprinkler or high-pile clearance. Your building has all of those, which is the work the app actually does: it fits the racking around the obstructions you draw and returns the fire and permit triggers cited.

The Narrow-aisle reach aisle is the 108″ class typical — the app’s weakest tier, and it flags it as unsourced for exactly that reason. Enter your truck’s right-angle stack off its spec plate and it computes the aisle from that instead; enter the maker’s published required aisle and it uses that verbatim. Aisles and flues here are steel to steel: a 48″ load on a 42″ frame hangs 3″ past each face, so the 108″ clear aisle is drawn as 114″ of steel and the 6″ steel flue is very little clear flue at all. Real flue widths are a fire-protection decision the app takes to the pre-flight, not an arithmetic default.

Height: 6 levels puts the top load at 28′-2″, which keeps the 36″ the app reserves by default between the highest load and the clear height. That figure is a field in the app, not a constant: heads hung at roof height sit above the clear height you enter, and a building whose real clearance is smaller gets the level back. What none of it checks is whether your truck can lift that far — the app will not invent a maximum fork height, and it flags positions above the one you enter as unservable.

And the app does better than this. What you see here is a single uniform block of racking, laid the better of the two ways round. The real packer searches: it splits the floor into separate zones, buries columns and other obstructions inside the racking instead of steering around them, and sizes the uprights to the building. Run the same empty 300′ × 200′ through it and it comes back with roughly a quarter more positions than this does — before it has seen a single thing about your actual building.

The arithmetic under the sliders

Aisles are converted steel-to-steel

A forklift’s aisle requirement is clearance between loads, and a 48″ pallet on a 42″ frame hangs 3″ past the steel on each face — so the calculator widens every aisle by both overhangs. A narrow-aisle reach’s 108″ clear aisle becomes 114″ of steel gap. Skipping that conversion is how a plan quietly loses 6″ of every aisle. The aisle width guide covers all four truck classes and the formula that beats them.

An aisle at both ends of every stack

A back-to-back pair picks from both faces, so a stack of pairs needs an operating aisle at each boundary — n modules and n + 1 aisles have to fit. The looser formula most quick estimates use invents rows whose pick face looks at a wall; the app’s packer calls them phantom rows, and this calculator refuses to count them. The rack layout guide walks the whole module: 42″ frames plus their column depth, back-to-back around a 6″ flue.

Levels come from the top of the load

Each level adds a 58″ pitch for a 48″ load — the load itself, lift-off clearance and a beam face — and the highest load, not the highest beam, must stay 36″ below the clear height as a planning reserve (your sprinkler design and fire-protection engineer set the real figure). In the 300′ × 200′ example that puts the top of load at 28′-2″ — the number a truck’s mast has to reach. The beam spacing guide shows the elevation math level by level.

2 pallets to a bay, honestly

Each load carries 3″ of operating clearance on both sides, so a 96″ clear opening stores 2 GMA pallets — and a load wider than its opening stores nothing rather than being silently narrowed to fit. Beam length itself is a manufacturer chart decision; the part numbers guide explains what governs it.

What it deliberately leaves out

No money — the app ships with an empty price list and shows $0.00 until a subscriber enters their own rates, so a cost figure here would be a rate card nobody stands behind. No building columns, docks, offices or battery rooms. No fire-protection judgment — the app raises sprinkler and high-pile questions as cited findings against a real drawing, which a slider page is not entitled to do. And no assumption that a truck can reach the top level: the app warns when positions sit above the fork height you entered instead of pretending they are usable. An empty rectangle always out-counts a real building — the gap between the two is exactly what the full product measures.

Frequently asked

How do I calculate how many pallet positions fit in a warehouse?

Work in one direction at a time. Across the building: back-to-back rack pairs and aisles must fit with an aisle at BOTH ends of the stack, using a steel-to-steel aisle that adds the load overhang to the forklift’s clear-aisle requirement. Along each row: count 96″ bays with an upright frame between and at each end. Up: from the clear height, keep the top of the highest load below the roof by a planning reserve, and divide what remains by the level pitch. Multiply rows × bays × pallets per bay × levels.

How many pallet positions fit in a 300′ × 200′ warehouse?

As one uniform block of single-deep selective rack at 32′ clear with narrow-aisle reach aisles, the packing math yields 8,832 pallet positions — 32 rows of 23 bays, 6 loads high. Treat it as an upper bound: a real building loses positions to columns, docks, staging, offices and cross-aisles.

What pallet and rack does the calculator assume?

A 48″ × 40″ GMA pallet, 48″ tall including the load, stored 2 to a 96″ clear bay opening on 42″-deep frames in back-to-back pairs. Those are the four most common planning assumptions in North American warehouses; the desktop app exposes every one of them per zone.

Does the calculator account for building columns, docks or offices?

No — deliberately. It packs one uniform block into an empty rectangle, which is why its count is an upper bound. Placing rack around real columns, dock staging and offices is drawing work, and that is what the full application is for.

Is the calculator free?

Yes. It runs entirely in your browser with no sign-up, using the same packing arithmetic the desktop application applies when it suggests a layout. The licensed product adds the drawing, the bill of materials, capacity placards and the flow simulation.

From an upper bound to a drawing

FloorCast3D takes the same arithmetic into your real building: draw the zone around the columns and docks that exist, and get the plan, a load-estimate bill of materials, capacity placards and a comparative flow simulation. The free trial key is the whole product for 14 days — no card, and everything it generates is marked as a trial copy until you subscribe. If you quote racking for a living, the case for rack design software for dealers is set out separately.

Get a free trial keySee pricing

The calculator is a planning tool: it packs one uniform block of single-deep selective rack into an empty rectangle and reports an upper bound. It is not engineering advice, a capacity rating, or a fire-protection judgment — final design, clearances, anchorage and load placards must come from the rack manufacturer’s current charts and a licensed engineer familiar with your jurisdiction. See our terms.