Skip to the tool
Priostack Apps

Warehouse capacity calculator

Pallet positions, utilisation and volume from the floor area, the pallet size and the number of levels.

Warehouse capacity calculator

Storage method

Racking: pallets sit on beams. Block stacking: pallets stand on the floor, stacked on top of each other.

Area unit

Choose the unit of the floor area you have, for example the one on the lease or the plan.

Inside the warehouse or the storage zone, in the unit chosen above, for example 25,000.

The floor covered by racks or pallet stacks, leaving out aisles, docks and offices, as a percentage of the floor area. Measure it on the plan.

%
Pallet size

Added to the length and the width of each pallet, for rack uprights and handling. Your racking supplier can give you the figure to use.

mm

Racking: load levels, counting the floor. Block stacking: how many pallets stand on top of each other.

Height, volume, weight and stock

Including the pallet, for example 1.5.

m

From the floor to the lowest thing above the storage: a beam, a sprinkler or a light.

m

kg

For the occupancy and the free positions.

Pallet positions

—

Enter the floor area, the share used for storage and the number of levels to see the capacity.

Positions per level
—
Levels
—
Floor area
—
Storage area
—
Floor space per position
—

Recent calculations

Nothing yet: copy, export or save a calculation to find it here.

Related apps

  • Pallet calculator

    How many boxes fit on a pallet? Layers, height, weight, volume in m³ and the pallets an order needs, for Euro and 1200 × 1000 pallets, with workings.

  • Container load calculator

    How many boxes fit in a 20ft, 40ft or high cube container by space and by weight, how many containers you need, and the VGM, with the workings.

  • CBM calculator

    Work out the CBM (cubic metres) of cartons and pallets from cm, mm, inches or feet, with cubic feet, total weight and your carrier's chargeable weight.

  • Reorder point calculator

    Work out your reorder point from average usage, supplier lead time and safety stock, or with the maximum usage method, and see if it is time to reorder.

See all 13 apps in Shipping and logistics

How it works

Enter the floor area, in square feet or square metres, the share of it taken by racking or pallet stacks, the pallet size and the number of levels: the calculator gives the number of pallet positions, with every step of the workings. Add the height of a loaded pallet and the clear height for the volumes, today's stock for the utilisation, and the average pallet weight for the weight at full capacity.

Measure the usable floor

Start from the internal floor area of the warehouse or of the storage zone. Then give the share of that area actually covered by racking or stacks: aisles, loading docks, picking areas and offices hold no pallets. The safest figure comes from the layout drawing. An area in square feet is converted at 0.09290304 m² per square foot, the exact figure that follows from the legal definition of the yard.

Choose the pallet and the clearance

The EPAL 1 Euro pallet measures 1200 × 800 mm and the EPAL 2 pallet 1200 × 1000 mm; for any other size, enter its dimensions. The clearance is added to the length and the width of each pallet, to allow for rack uprights and handling. With no clearance, the result is a theoretical maximum.

Count the levels

For racking, count the load levels, including the floor. For block stacking, count the pallets stacked on top of each other, within what the loads can bear. With the height of a loaded pallet and the clear height, the calculator shows the most levels that fit under the lowest obstruction, before beams and clearances.

Rounding

Positions are rounded down, because part of a position holds no pallet. Areas and volumes are rounded to two decimal places and percentages to one, to the nearest (halves round up).

Storage area = floor area × share used for storage.

Floor space per position = (length + clearance) × (width + clearance).

Positions per level = storage area ÷ floor space per position, rounded down.

Pallet positions = positions per level × number of levels.

Utilisation (occupancy) = pallets in stock ÷ pallet positions.

Example: a 20,000 sq ft racked warehouse

20,000 sq ft is 1,858.06 m². With racking on 45% of the floor, the storage area is 836.13 m². A 1200 × 1000 mm pallet with 100 mm of clearance takes (1,200 mm + 100 mm) × (1,000 mm + 100 mm) = 1.43 m², and 836.13 ÷ 1.43 = 584.71, so 584 positions fit per level: 2,336 positions on 4 levels. With loads 1.6 m high under a clear height of 9 m, the loads reach 6.4 m and at most 5 levels would fit. With 1,000 pallets in stock, occupancy is 42.8% and 1,336 positions are free.

Frequently asked questions

How do I calculate the pallet capacity of a warehouse?

Multiply the positions on the floor by the number of levels. The positions on the floor are the area actually covered by storage divided by the floor space of one position, pallet and clearance included, rounded down. Capacity in pallet positions can be compared directly with your stock.

How many pallets fit in a 10,000 sq ft warehouse?

It depends on how much of the floor you can rack and on the number of levels. 10,000 sq ft is 929.03 m². With racking on 45% of it (418.06 m²) and 1200 × 1000 mm pallets with 100 mm of clearance (1.43 m² each), 292 pallets fit per level, so 1,168 on 4 levels.

How do I work out warehouse utilisation?

Divide the pallets in stock by the pallet positions and multiply by 100: 1,000 pallets in 2,336 positions is 42.8%. The calculator also shows the share of the internal volume the loads take up, which is lower, because aisles and the space above the loads stay empty.

How do I convert square feet to square metres?

Multiply by 0.09290304. The yard is defined in law as 0.9144 metre and a square foot is one-ninth of a square yard, so the factor is exact: 10,000 sq ft is 929.0304 m². To go back, divide by the same figure.

Does UK fire safety law limit how much a warehouse can store?

Not by a figure, and this calculator applies none. UK fire safety law sets no capacity or volume threshold: it requires a fire risk assessment. In England and Wales the responsible person must assess the fire risks under article 9 of the Regulatory Reform (Fire Safety) Order 2005, and the Home Office guide for factories and warehouses, written for England, explains how, storage included. In Scotland the duty comes from sections 53 and 54 of the Fire (Scotland) Act 2005, and in Northern Ireland from articles 25 and 26 of the Fire and Rescue Services (Northern Ireland) Order 2006. The French page of this calculator also checks the French classified-warehouse thresholds, which do not apply in the UK.

Sources

  1. legislation.gov.uk: Weights and Measures Act 1985, Schedule 1, Part VI (yard, foot and square foot) (8 November 2026)
  2. legislation.gov.uk: Regulatory Reform (Fire Safety) Order 2005, article 9 (risk assessment) and article 1(4) (extent) (8 November 2026)
  3. GOV.UK (Home Office): Fire safety risk assessment: factories and warehouses (applies to England) (12 September 2023)
  4. legislation.gov.uk: Fire (Scotland) Act 2005, section 53 (duties of employers) and section 54 (duties in relation to relevant premises) (11 November 2026)
  5. legislation.gov.uk: Fire and Rescue Services (Northern Ireland) Order 2006, article 25 (duties of employers) and article 26 (duties in relation to relevant premises) (11 November 2026)
  6. EPAL: EPAL 1 Euro pallet (1200 × 800 × 144 mm), retrieved 11 November 2026 (11 November 2026)
  7. EPAL: EPAL 2 pallet (1200 × 1000 × 162 mm), retrieved 11 November 2026 (11 November 2026)

This calculator gives general information, not legal, tax, financial or accounting advice, nor technical safety advice. The real capacity depends on your layout, your racking and the fire safety arrangements of your site: check them with your racking supplier and against your fire risk assessment.

Last reviewed: