Broken Percentage in Rice: Reading a Specification Correctly

What does "5 percent broken" mean on a rice specification?

It means no more than 5 percent of the sample by weight consists of kernel fragments shorter than a stated fraction of the whole kernel, and that fraction decides what you receive as much as the figure does. A broken kernel is a fragment of milled rice that falls below a defined length threshold; a whole kernel, also called head rice, is any grain at or above it. The threshold is called the basis. Three bases circulate in the trade: three-quarters of the average whole-kernel length, two-thirds and one-half. Two suppliers can both write 5 percent broken maximum, test the same lot honestly and report different figures because each has counted a different population of fragments. An experienced sourcing manager therefore reads the basis first, the method second and the number last; a specification that gives only the number is incomplete.

Which basis do the main standards use?

Most published standards set the whole-kernel threshold at three-quarters of average kernel length, but private trade contracts frequently depart from this, so the contract wording governs. The Codex Standard for Rice (CODEX STAN 198-1995) treats kernels below three-quarters as broken and splits them into large brokens (one-half to under three-quarters), medium brokens (one-quarter to under one-half) and small brokens or chips (under one-quarter). The United States Standards for Rice, applied by USDA FGIS, use the same three-quarters concept but determine the broken fractions mechanically with sizing plates and sieves rather than by visual length judgement. Some national export grading systems set head rice at eight-tenths of whole length instead.

Reference	Whole kernel	Broken kernel	How brokens are sub-divided
Codex STAN 198-1995	3/4 of average whole-kernel length or more	Less than 3/4	Large (1/2 to under 3/4), medium (1/4 to under 1/2), chips (under 1/4)
ISO 7301	3/4 or more	Less than 3/4	Size classes aligned with Codex
US Standards for Rice (USDA FGIS)	3/4 or more	Less than 3/4	Fractions separated by sizing plates and sieves
Typical private trade contract	Contract-defined, usually 3/4 or 2/3	Below the stated fraction	Often a single figure; chips sometimes capped separately

Contracts for rice sold into the Indian cuisine trade commonly use either a three-quarters or a two-thirds basis, so ask which applies before comparing offers.

Why does the same lot read differently on different bases?

Because a shorter basis excludes fragments that a longer basis counts, the reported figure always falls as the basis moves from three-quarters towards one-half. There is no fixed conversion between bases; the gap depends on how the fragments in that particular lot are distributed by length, which in turn depends on variety, milling degree, drying history and handling. As a purely illustrative example, not a typical outcome, a lot reported at 8 percent on a three-quarters basis could read around 5 percent on a two-thirds basis and around 3 percent on a one-half basis if most of its fragments are long; a lot rich in chips would show a much smaller gap. A competing offer quoting a lower broken figure on a shorter basis is therefore not automatically the better lot.

The same caution applies to kernel-length grades on aromatic rice. Labels such as extra-long, and average-length figures above 8.0 mm quoted for Basmati Rice, are trade descriptions rather than thresholds fixed by an international standard, so the length tiers, the measurement method and the minimum average length should be written into the contract alongside the broken basis.

How is the broken percentage measured?

A representative sample is drawn, reduced to a working sample, and the fragments are separated from whole kernels by hand, length grader or image analyser, then weighed. Sampling follows ISO 24333 or the inspection agency's procedure: increments probed through the full depth of a stated number of bags across the stack, combined and divided down. Hand separation is usually performed on a 100 g working sample, sometimes 50 g for aromatic rice, against reference kernels of known average length, with the broken fraction weighed to 0.01 g. Length graders and image analysers are repeatable but are calibrated to a basis, so the certificate should state both instrument and basis setting; two methods on one sample can differ by a point or more. Moisture belongs in the same clause: Codex 198 caps milled rice at 15 percent, while shipment contracts more commonly specify 13 to 14 percent maximum, varying by grade and destination climate.

Why is the destination figure often higher than the loading figure?

Rice is brittle and every transfer between milling, bagging, container stuffing and discharge can add fragments, so loading and destination certificates rarely agree exactly. It is a common trade observation, not a fixed rule, that milled rice dried well below about 12 percent moisture tends to fissure and break more readily in handling than rice held nearer 13 to 14 percent; the effect varies with variety, drying method and milling degree. It is also frequently observed that brokens and chips distribute unevenly within a bag during filling and transit, which is one reason standard procedures require probing through the full bag depth rather than skimming the top.

Two contract mechanisms manage the gap. The first is a tolerance: many forms write 5 percent maximum, basis three-quarters, 1 to 2 percentage points more or less, but the permitted spread and any price allowance for exceeding it depend on the trade association form or private contract in use and are not universal. The second is naming which certificate is final. If the loading inspection is final as to quality, a higher destination reading becomes a claim against the carrier or insurer rather than the seller; if destination inspection governs, sellers price accordingly. Confirm which applies and whether the tolerance is expressed in percentage points or as a relative percentage of the figure.

How much broken content should a buyer specify?

Specify the level the end use tolerates rather than the lowest figure on offer, because lower brokens cost more and add nothing to some applications. Retail table rice for the Indian cuisine market is typically bought at 5 percent maximum, with premium aromatic lines at 1 to 2 percent; Crystal Sona Masoori Rice for retail packing is commonly specified around 5 percent. Parboiled rice for soaking and wet grinding, such as Idli Rice, is often accepted at 10 to 25 percent because kernel length has no functional value in batter, and the same applies to rice destined for flour or rava. Manufacturers of puffed or flaked rice need whole kernels for shape and usually sit at 5 percent or below. These are typical ranges and vary by market, season and grade.

Consider a separate chips cap. Two lots at 5 percent broken behave differently if one holds 4 percent chips and the other 4 percent large brokens; chips cook faster, cloud the cooking water and raise dust in processing. Where this matters, a small-brokens maximum of 0.5 to 1 percent is common.

What should the broken clause in a purchase specification contain?

A complete clause states the maximum figure, the basis, the standard or method, the sample size, the moisture ceiling, the tolerance and which inspection is final. In practice: broken kernels maximum 5 percent by weight; basis three-quarters of average whole-kernel length per Codex STAN 198-1995; small brokens maximum 1 percent; determination by hand separation on a 100 g working sample or by image analyser set to the same basis, method stated on the certificate; sampling per ISO 24333; moisture maximum 14 percent; tolerance 1 percentage point more or less without allowance; third-party pre-shipment certificate final as to quality. Each element closes one route to a dispute. ODOD LLC writes its rice specifications on this pattern and provides certificates for its US FDA registration, ISO, Halal, HACCP and GMP systems with each quotation, with origin stated on the quotation and shipping documents.

To receive a specification and offer for milled, parboiled or aromatic rice on a stated broken basis, request a quotation with your target broken figure, basis, end use, pack size and destination. Prices depend on grade, quantity and destination.