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Paddy Yield Estimator
Estimate paddy rice harvest yield in tonnes per hectare from planting density, panicles, filled grain percentage, and 1,000-grain weight using the IRRI yield equation.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Estimated Yield (Per Hectare)
Total Harvest Crop Output
Total Grains Density
Productive filled grains per m²
How it works
- Input your planting hill density per square meter and average number of productive panicles per hill.
- Enter the average total grains per panicle and the percentage of filled fertile grains.
- Specify the 1,000-grain weight (typically 24–28g) and total field acreage or hectares.
- The calculator applies the IRRI yield equation to project harvest output in tonnes/hectare, bushels/acre, and standard 50kg bag counts.
The formula
Panicles/m² = Hills/m² × Panicles/Hill
Filled Grains/m² = Panicles/m² × Grains/Panicle × (Filled % / 100)
Yield (t/ha) = (Filled Grains/m² × 1,000-Grain Weight (g)) / 100,000
FAQ
How is paddy rice yield estimated in agronomy?
The standard International Rice Research Institute (IRRI) formula determines grain yield based on four primary components: (1) Number of panicles per square meter, (2) Total spikelets (grains) per panicle, (3) Percentage of filled/fertile grains, and (4) 1,000-grain weight in grams.
What is a typical 1,000-grain weight for paddy rice?
For most Indica and Japonica cultivated rice varieties, the 1,000-grain weight typically ranges between 23 and 28 grams (average ~25 grams) at 14% storage moisture content.
What is a typical planting density for transplanted vs direct-seeded rice?
Transplanted paddy typically has 20 to 25 hills per square meter (e.g. 20 cm × 20 cm spacing), with each hill producing 14 to 20 effective productive tillers.
What is considered a good rice paddy yield?
Global average paddy yield is around 4.5 to 5.5 tonnes per hectare (approx 4,000 to 5,000 lbs/acre). High-yielding modern hybrid varieties under optimal irrigation and nitrogen management can achieve 8.0 to 10.0 tonnes per hectare.
How we compare
| Feature | Online Tool Store | Agricultural extension sheets | Manual estimation |
|---|---|---|---|
| IRRI 4-component agronomic yield formula | ✓ | ✓ | ✗ |
| 50kg harvest bag & bushel conversions | ✓ | ✗ | ✗ |
| Metric (ha) and Imperial (acre) support | ✓ | Partial | ✗ |