How much produce fits in a bulk bin? A sizing guide

A bin’s litre rating isn’t its weight rating — how many kilograms of produce it holds depends on the crop’s bulk density. As a working figure, a common 750 L vented bin holds roughly 490 kg of potatoes, a 700 L bin about 455 kg, and a 1,400 L bulk box around 910 kg, because bulk potato packs at about 650 kg per cubic metre. Lighter crops like onions and apples fill the same bin to fewer kilos. Here’s how to convert litres to kilograms for the main crops, what footprint to standardise on, and why the load rating still matters once the bin is stacked.

How do you convert a bin’s litres to kilograms?

Multiply the bin’s volume in cubic metres by the crop’s bulk density in kilograms per cubic metre — where 1,000 L = 1 m³. So a 750 L bin is 0.75 m³, and at 650 kg/m³ for bulk potato that’s about 490 kg. That single calculation, volume × bulk density, converts any litre rating into a planning weight; get the density right for your crop and the rest is arithmetic you can do on a clipboard.

Bulk density is not the same as the density of a single tuber. A solid potato is denser than 650 kg/m³, but a bin full of them includes the air gaps between — the bulk (packed) density is what fills a bin. Australian and overseas potato-storage extension data put bulk potato at roughly 40–43 lb/ft³ (about 640–690 kg/m³), with smaller, rounder tubers packing denser than large irregular ones. Use the lower end for big, knobbly grades and the higher end for small rounds.

The same logic governs every respiring crop you put in a vented bin, which is why a single bin model carries very different weights depending on what fills it. Onions and apples leave more void space and pack lighter; densely nesting carrots sit between potato and onion. The table further down converts four real Australian bin volumes into approximate fill weights for each.

Why doesn’t a 1,000 L bin hold 1,000 kg of produce?

Because produce is far less dense than water. One litre of water weighs exactly 1 kg, but bulk potato weighs about 0.65 kg per litre and onions less again, so a 1,000 L bin of potato holds roughly 650 kg — not a tonne. The litre figure describes the space inside the bin; the kilogram figure depends entirely on what you pour into that space and how tightly it nests.

This trips up first-time buyers who read a 1,400 L box as “nearly a tonne and a half”. It is closer to 910 kg of potato or 770 kg of onion, and the gap matters twice over: once for how many bins you need to move a harvest, and once for the bin’s own load rating when those near-tonne boxes are stacked three high in store. Plan tonnage on bulk density, never on the litre badge.

Post-harvest losses make accurate sizing worth the few minutes it takes. The Food and Agriculture Organization of the UN estimates that around 14% of the world’s food is lost between harvest and retail, with poor handling and storage a major contributor (fao.org). Australia takes that loss seriously enough to set a national target: through the National Food Waste Strategy, the Australian Government has committed to halving food waste by 2030 (agriculture.gov.au). Right-sizing bins so a crop ships cool and dry, in containers rated for the weight, is one of the cheapest levers a grower controls over that number — and it starts with knowing what each bin really holds.

How many kilograms of each crop fit per bin size?

Below are indicative packed bulk densities and the resulting fill weight across four real Australian vented bin volumes — a 470 L half bin, ~700 L and ~750 L full bins, and a ~1,400 L bulk box. Treat these as planning figures for sizing a fleet: variety, size grade, moisture and how the bin is filled all move the real number. If your own packout figures differ, trust your own — these are starting points, not grading specs.

Read down a column to compare crops in one bin, or across a row to size up. The spread is wide: the same 1,400 L box swings from about 770 kg of onion to 910 kg of potato — a 140 kg difference per bin that compounds fast across a full store. For respiring crops that difference also rides on a vented wall, because a packed near-tonne load has to shed field heat from its deep centre, not just its surface.

A 750 L folding vented pallet box is the everyday full-size unit for a potato or onion shed: roughly 490 kg of potato per bin on the standard 1165-class footprint, vented walls for airflow, and a body that folds down when empty to reclaim shed and return-freight space between seasons. For a shallower fill that’s easier to hand-pack and gentler on delicate crops, a low vented half bin (~470 L) keeps the same footprint at roughly two-thirds the depth.

What is the standard Australian bulk bin footprint?

Most Australian field and storage bulk bins share a 1165 × 1165 mm footprint, which palletises neatly and squares up in cold store and on the truck. The common volumes step up from there — a ~470 L half bin, ~700–750 L full bins, and bulk boxes around 1,400 L that carry close to a tonne of dense crop. Matching the footprint across your fleet keeps stacking square and forklift handling predictable, which is half the value of standardising.

The payoff of a single footprint is operational. One forklift tine setting, one racking pitch and one truck floor pattern serve every bin, so empties returning from market interleave with full bins coming in without a second handling system. It also means you can run different volumes — a half bin for berries, a full bin for onions, a bulk box for potatoes — on the same pallets and the same stack plan. The shared 1165 base is why mixed-crop packhouses standardise on it rather than chasing the cheapest odd-size bin.

Volume rises with bin height on that fixed base, so deeper bins hold more but stack fewer-high under a ceiling, and a near-tonne box concentrates more weight onto the unit beneath it. That trade between fill depth, stack height and load rating is the next thing to get right.

How does the load rating limit a full bin?

Volume tells you what fits; the bin’s load rating tells you what it may safely carry, especially when stacked. A bin that physically holds 910 kg of potato still has to bear the bins stacked on top of it in store — so the controlling number is the static (stacking) rating checked against your stack height, not the weight of a single bin in isolation. Over-fill or over-stack past that figure and the bottom bin in a column is where a load fails.

Work it through for a near-tonne box. A ~1,400 L bulk box holding 910 kg of potato, stacked three high, puts roughly 1,820 kg of crop bearing down on the lowest box (the two boxes above it), before the weight of the boxes themselves. That is well inside a heavy-duty box rated around 7,000 kg static, but it shows why you reach for the static figure rather than guessing: the limit is set by the load above, and dense crops reach big numbers in just a few tiers. The same arithmetic applied to a lighter-rated bin, or a taller stack, is exactly how a column buckles.

These figures count only the crop; add the empty weight of the boxes above (tens of kilos each) and keep a margin for forklift snatch and uneven floors. The load ratings work the same way for stacked bins as for pallets — see static vs dynamic vs racking ratings for how those three numbers differ and why the static figure is the one that governs a stack. If you intend to rack bins rather than floor-stack them, the racking figure (lower again) is the limiting case.

For high-volume potato storage, a single giant vented box carries close to a tonne of crop — about 910 kg — on a stable base rated to 7,000 kg static, so it stacks several high without trouble. Moulded in one piece, it breathes through both the walls and the floor, which is what keeps the deep centre of a near-tonne load from sweating. Fewer, larger bins mean fewer lifts per tonne and a tidier stack, at the cost of a heavier individual unit to handle.

Vented or solid, stacked or nested — which do you need?

Choose vented for crops that keep respiring after harvest and solid for wet or non-respiring loads; the litre rating and fill weights are identical, only the wall changes. The stacking question is separate: full bins stack square for store and transport, while some designs nest or fold flat empty to reclaim space between seasons. Match both to your crop and your shed.

• Vented bins let air move through the stack so respiring crops like potato and onion shed heat and moisture — the same litre rating, built to breathe. Solid-walled bins suit wet handling, liquids and non-respiring loads.
• Stack-loaded — full bins stack square for cold store and transport; confirm the rated static stack height for your crop weight.
• Nest- or fold-when-empty — folding pallet boxes collapse to a fraction of their height empty, so return freight and off-season storage cost a fraction of shipping rigid air.

For the airflow detail on why respiring crops need genuine ventilation — slots through the walls and an open base, not a couple of token holes — read why potatoes and onions need vented bins. To see how the same vented bins move through a packing and distribution chain, the food distribution range covers the cold-chain side.

How do you size a bin fleet for a season?

Divide your peak tonnage by the fill weight per bin — not the litre rating — then add bins for the ones in transit, being washed, or holding stock at any moment. Sizing on bulk density rather than volume is what stops a fleet coming up short mid-harvest, because the litre badge always flatters the weight a bin actually carries.

Worked example: a grower lifting 500 tonnes of potato into 750 L bins needs about 1,020 bins just to hold the crop (500,000 kg ÷ ~490 kg per bin). Switch to 1,400 L boxes at ~910 kg each and the count drops to about 550 — roughly half the units to buy, handle and store, though each is heavier and taller. The same 500 t in 470 L half bins would need about 1,640. That spread is the core fleet decision: fewer big boxes cut handling and stack footprint; more small bins are easier to fill by hand and gentler on the crop.

From there, layer in the practical multipliers — a buffer for bins out at market or in the wash bay, the stack height your store ceiling allows, and whether you own a fixed fleet or top up with rental for peak-only volume. Browse the produce range, compare every volume and load rating across the bulk containers category or in the product finder, or answer a few questions and let us recommend a bin and fleet size for your crop and shed.

Common questions

How many kilograms of potatoes fit in a bulk bin?

At a bulk density of about 650 kg/m³, a 700 L bin holds roughly 455 kg, a 750 L bin about 490 kg, and a 1,400 L bulk box around 910 kg of potatoes. Smaller, rounder tubers pack denser and can run a little higher; large irregular ones a little lower. Always check the bin’s static rating before stacking near a tonne of crop.

Why doesn’t a 1,000 L bin hold 1,000 kg of produce?

Because produce isn’t as dense as water. One litre of water weighs 1 kg, but bulk potato is about 0.65 kg per litre and onions less, so a 1,000 L bin of potato holds roughly 650 kg — and the bin must still be load-rated for that weight when stacked.

What’s the standard Australian bulk bin footprint?

1165 × 1165 mm is the common footprint for field and storage bulk bins, which palletises and stacks squarely. Volumes vary on that base — a ~470 L half bin, ~700–750 L full bins, and bulk boxes around 1,400 L for denser, near-tonne loads.

Do I need vented or solid bins for potatoes and onions?

Vented for crops that keep respiring after harvest — potato, onion, carrot — so the stack sheds heat and moisture. Solid-walled for wet handling, liquids or loads that don’t need airflow. Both come in the same nominal litre sizes, so fill weights are identical; only the wall changes.

Is bulk density the same as the density of a single potato?

No. A solid potato is denser than 650 kg/m³, but a bin full of them includes the air gaps between tubers. The bulk (packed) density — around 640–690 kg/m³ for potato — is what fills a bin and what you use for sizing. Single-item density overstates the weight a bin will actually hold.

Sources: FAO Platform on Food Loss and Waste / The State of Food and Agriculture 2019 (~14% post-harvest loss). Potato bulk-density range from potato-storage extension data (≈40–43 lb/ft³ ≈ 640–690 kg/m³); onion ~550, carrot ~600 and apple ~550 kg/m³ are indicative packed bulk densities. Fill weights are calculated from those densities and real bin volumes (470 / 700 / 750 / 1,400 L) and are planning figures only — actual fill varies with variety, grade, moisture and fill method; use your own packout data for grading. Stacking figures count crop weight only and assume the manufacturer’s tested static rating; confirm load ratings and stack heights for your bins. Not a quote.