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Rice Yield Calculator

A measured patch gives you a paddy weight, but wet grain and white rice are different quantities. Enter cleaned paddy from the area you harvested and its moisture. The calculator puts paddy on a 14% basis, then estimates milled rice from a clearly stated recovery rate.

Your measured harvest

Weigh threshed, cleaned paddy that still has its husk. Include only the ground that produced this sample.

kg

Weight at the moisture measured below; no straw or soil.

Use the cut patch or whole-field area matching this weight.

%

Wet-basis percent from this paddy sample; 0 to 99.99.

Optional milling and field projection
%

Illustrative 65% default. Use your mill's total white-rice recovery; clear to omit the estimate.

ha

Projects sample yield across this area; leave blank if not needed.

Yield from this sample

Paddy is the grain with husk. Milled rice is a later product, so its amount depends on the recovery you use.

Paddy yield at 14% moisture

Enter your measured paddy sample and calculate.

The milled-rice figure uses an assumed or entered total recovery, not a head-rice grade. A small sample may miss weak parts of a field. Drying costs, physical handling losses and buyer deductions are outside this estimate.

A harvest patch has two stories

From paddy in a bag to rice from a mill

You cut a small rice patch, thresh it and carry home a bag of paddy. The scale gives a weight, but not yet a field yield. You still need the area that produced it. And because newly harvested paddy contains water, its scale weight cannot be compared fairly with a drier sample.

Once that paddy is dried and milled, the white rice weighs less again. The husk and bran are removed; some grain may break. This calculator follows those stages in order so the paddy yield never gets confused with the estimated milled-rice yield.

In the fieldWeigh paddyThreshed, cleaned grain with husk
For comparisonAdjust to 14%Same dry matter, common moisture
At the millApply recoveryEstimated whole + broken white rice

How to use the calculator

Step 1

Measure one matching patch

Harvest a known area, then thresh, clean and weigh its paddy in kilograms. Enter that same area in square metres; choose hectares if the weight comes from a larger harvested field. Keep loose straw, soil and unfilled grains out of the sample weight.

Step 2

Enter its actual moisture

Measure wet-basis moisture from the paddy you weighed and enter the percentage. Do not guess a harvest-season average when a meter reading is available. The calculator moves this weight to a 14% comparison basis without changing its dry matter.

Step 3

Read paddy first, then milling

Select Calculate rice yield. The large result is paddy tonnes per hectare at 14% moisture. The three-stage flow shows your weighed sample, its adjusted weight and the possible milled-rice yield. Open the optional section to replace the illustrative 65% recovery, clear it to omit milling, or project across a whole-field area.

Watch a 10-square-metre sample change

Suppose your cleaned paddy from 10 m² weighs 5 kg and a moisture meter reads 22%. That is 5 t/ha if you simply scale the wet weight. But the sample includes more water than paddy at the 14% basis.

As harvested5.00 kg10 m² · 22% moisture
At 14% moisture4.53 kg4.53 t/ha of paddy
After milling2.95 t/haIllustrative 65% total recovery

That last figure is not a second harvest measurement. It is a planning estimate based on a milling percentage. If the actual mill recovers a different share, replace 65% with that measured total recovery.

Why the moisture adjustment works

The 5 kg sample at 22% moisture contains 78% dry matter. Its dry matter is 3.9 kg. At 14% moisture, dry matter makes up 86% of the paddy weight. Divide 3.9 by 0.86 to get about 4.53 kg at the common basis.

Paddy kg at 14% = measured paddy kg × (100 − measured moisture %) ÷ 86

Paddy t/ha = adjusted sample kg ÷ harvested m² × 10

Milled rice t/ha = paddy t/ha × total milling recovery % ÷ 100

For the example: 5 × 78 ÷ 86 = 4.5349 kg. Divide by 10 m² and multiply by 10 to get 4.5349 t/ha. At 65% recovery, multiply by 0.65 for 2.9477 t/ha milled rice. The calculator retains full precision and rounds the displayed results.

If your paddy is already at 14%, the adjustment changes nothing. Below 14%, the equivalent weight at 14% can be higher than the measured weight because that comparison basis contains more water. No rice has been physically added.

What does “milled rice” include?

Paddy still has its husk. Milling removes the husk and bran to make white rice. A total milling recovery percentage compares the weight of all milled rice—whole and broken kernels—with the weight of paddy on a comparable basis.

100 kg paddy at 14%starting product
65% total recovery65 kg milled rice
Head ricenot calculated

Head rice means the qualifying whole-kernel portion. Its recovery is a different percentage. Do not enter a head-rice recovery in the total recovery field if you want all milled rice. The 65% default is only a visible illustration; variety, grain condition and mill setup affect actual output.

See what a different mill would change.

The example paddy yield is 4.53 t/ha. At 60% total recovery, estimated milled rice is 2.72 t/ha; at 70%, it is 3.17 t/ha. The field yield did not change—only the assumed milling result did. Use a measured recovery when a sales decision depends on it.

Project across a field with care

If the example patch represents a 2 ha field, the optional projection gives about 9.07 tonnes of paddy at 14% moisture and 5.90 tonnes of milled rice at 65% recovery. The arithmetic is simply yield per hectare multiplied by two. The hard part is deciding whether the 10 m² patch tells the truth about the other 19,990 m².

Keep a small field notebook.

Record each patch's location, cut area, cleaned paddy weight and moisture. A low patch and a high patch tell you more than one convenient sample near the road. Compare several sites before you use a whole-field projection for storage, milling or sales plans.

If you weighed the entire harvested field, enter that weight and its actual area directly. There is no need to multiply the same field twice. The Yield per Hectare and Acre Calculator can standardize other completed harvest weights, while the Rice Seed Requirement Calculator handles seed planning before planting.

Before relying on the estimate

Five checks at the scale

  • Weigh paddy with husk, after threshing and cleaning.
  • Measure the cut area, including only ground that supplied the sample.
  • Measure moisture from that same paddy lot.
  • Use total milling recovery, not head-rice recovery.
  • Compare several field locations before projecting a total.

Drying changes water mass; handling can also lose grain. This calculator models the first effect as a 14% comparison basis and estimates milling from your recovery input. It does not predict physical drying or milling losses beyond that percentage, broken-rice grades, sale price or revenue. For a sales plan, use an actual mill result and buyer terms with the Farm Profit Calculator.

Frequently asked questions

What is paddy rice in this calculator?
Paddy is threshed rice grain still in its husk. Weigh cleaned paddy without straw, soil or loose debris. Do not enter an already milled-rice weight as paddy.
Why adjust paddy yield to 14% moisture?
Paddy weighed at different moisture levels contains different amounts of water. The 14% basis lets you compare grain amounts while keeping the same dry matter; it is not a prediction of drying charges or sale weight.
What if my sample is already at 14% moisture?
Enter 14. The adjusted paddy sample weight will equal the weight you entered.
Can adjusted weight be higher than measured weight?
Yes. If the sample is below 14% moisture, its equivalent weight at 14% is mathematically higher. This does not create physical rice.
Where does the 65% milling recovery come from?
It is an illustrative planning assumption, not a guarantee for your variety or mill. Replace it with a measured total milling recovery for comparable paddy, or clear it to omit the milled-rice estimate.
Is milling recovery the same as head-rice recovery?
No. Total milling recovery counts both whole and broken milled rice by weight. Head-rice recovery counts only qualifying whole kernels and is not calculated here.
Can I use a whole-field harvest instead of a small sample?
Yes. Enter the cleaned paddy weight and the entire harvested area, selecting hectares if convenient. The area must match the grain weight. An optional field projection is unnecessary when the input already covers the whole field.
Does this predict my actual saleable rice?
No. It applies your recovery percentage to paddy at a common moisture basis. Actual output depends on grain quality, the mill, sorting, handling and any buyer specification.