Warehouse Space Calculator: Floor Area from Pallets, Cartons or CBM

A warehouse space calculator answers the question every lease starts with: how many square feet do I actually need? Floor area depends on what you store, how high you can go and how wide your truck's aisles must be, so a single rule of thumb can be out by half. Enter your stock and building above and you will see the floor area, what takes up the space, and how each storage method changes the answer.

Every starting figure comes from a named truck maker, rack association or standard, or is labelled as our assumption. You can change them under Planning assumptions.

How much warehouse space do I need?

Work from your busiest stock level, not your average, then build up in five steps. The calculator does each one:

1. Count pallets. Cartons are turned into pallets by how many layers fit at your load height. A CBM figure is turned into pallets by how full a pallet's cube gets.
2. Keep slots free. A warehouse with every slot full can't move stock around, so a planner adds spare positions. We start from 85% in use, a widely repeated figure with no study behind it. 80-90% is also quoted.
3. Find the levels. The building's clear height and your truck's lift together decide how many rack levels you get, and that divides the floor you need.
4. Add the aisle. The floor one pallet position takes is its width × (its depth + half the aisle) ÷ the levels. The aisle is shared by the racks on each side, so each side carries half. This is the standard formula from warehouse science, and it is why aisle width matters so much.
5. Add the rest of the building. Cross-aisles, docks, staging and offices. Our starting split of 15% docks and staging and 3% offices comes from one developer's example, so enter your own if you know them.

Floor area for common pallet counts

These use the calculator's starting figures: 1200 × 1000 mm pallets, loads 1.5 m high, an 8 m clear height, and selective racks with a 4-wheel forklift in a 3.8 m aisle. Yours will differ, so treat this table as a sense of scale.

How storage methods compare

The method is the largest thing you can change. Here is 1,000 pallets under each method in the same 11 m building:

Hand stacking looks small here because its figure is one guideline, stacks on about 70% of the floor, with no spare slots, docks or offices added, so compare it with care. A narrower aisle saves floor, but the truck costs more and the racks must be built around it, and turret-type VNA trucks need guided aisles and a very flat floor. Floor stacking saves on racks, but suits stock with few product types, because a part-empty lane can't be used for anything else.

Aisle width by truck

These are planning figures, and the table says what each rests on. Data sheets differ on battery and mast, so your own truck's sheet overrides them. The figures are for stacking at a right angle: Mecalux gives a separate rule for through traffic of the load plus 600 mm one-way or plus 900 mm two-way.

CBM to sq ft: how the conversion works

A CBM can't convert to square feet by itself, because one is a volume and the other an area. You need the height you can stack to. The floor under the stack is CBM ÷ stack height, and 1 sq m is 10.764 sq ft. So 100 CBM stacked 2 m high covers 50 sq m, or 538 sq ft of floor, before any aisles.

Add aisles and working space on top: one guideline for hand-stacked stores is about 70% of the floor under stacks. Choose Total CBM above and the calculator handles all of this for each method. To work out the CBM of your cargo first, use the CBM & Container Load Calculator.

Pallet sizes in India

India adopts the ISO pallet sizes through IS 7276:2021: 1200 × 1000, 1200 × 800, 1219 × 1016, 1100 × 1100, 1067 × 1067 and 1140 × 1140 mm. We start from 1200 × 1000 mm because Indian makers sell it and it sits in that standard, but we found no Indian body naming it the national default. If your goods sit on something else, measure a loaded pallet and use the closest size.

What this estimate leaves out

It assumes a clear rectangular floor. Real buildings have columns, doors, ramps and fire exits, and a lease is often charged on a larger area than the floor you can use. Rack height, aisle widths and sprinklers also depend on fire rules. The Indian texts on these have recently changed, with IS 3594:2024 replacing the 1991 edition and SP 7:2026 replacing the National Building Code 2016, so we do not treat any figure here as a legal requirement. Ask your fire consultant and the local fire authority before you order racks.

Once you have a figure, look for warehouses on Farbe Spaces, where listings come from owners and brokers. Farbe Enterprise also arranges warehouse space for rent in the city you need, with its own warehouse in Ankleshwar, and runs 3PL warehousing. Measuring a site? The Map Area Calculator and Area Converter help with that, and the Volumetric Weight Calculator shows what the same stock bills as when it ships.

Where the starting figures come from

Read on 6 November 2026. Makers and standards can change their figures.

• Linde E20-E35 data sheet
• Linde E14-E20 data sheet
• Linde R14-R25 data sheet
• Linde L14-L16 AS data sheet
• Godrej articulated forklift
• Mecalux: forklift aisle width
• Logistics Cluster: warehouse guidance
• SEMA columns in Warehouse News (rack gaps)
• Mecalux: standard beam lengths
• Mecalux: clearances and aisle rules
• Bartholdi and Hackman: Warehouse & Distribution Science (area per pallet position)
• Link Logistics: storage capacity example (occupancy, docks, office)
• BIS: IS 7276:2021 (pallet sizes)
• FCI godown specifications (5.6 m, stack share)
• ESR: warehouse checklist (Grade A, 10-12 m)
• IS 4082 (cement and fly ash bag stacks)

Frequently asked questions