Sunflower Yield Estimator
Estimate sunflower yield before harvest from plants/m², heads per plant, seeds per head and grain weight — the components-of-yield method.
Sunflower's single head holds 800–1500 filled seeds at a ~50–70 g thousand-seed weight. Sample several 1 m² quadrats across the field and average them for a reliable pre-harvest estimate.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers, FPOs and crop insurers use the free Sunflower Yield Estimator to predict yield before harvest from a few quadrat counts — no waiting for the threshing floor.
About Sunflower Yield Estimator
Estimate your sunflower yield weeks before harvest using the universal components-of-yield method. Sunflower's single head holds 800–1500 filled seeds at a ~50–70 g thousand-seed weight. The formula multiplies plants per m² × heads per plant × seeds per head × thousand-grain weight to give grains per m² and then yield: yield (kg/ha) = grains/m² × (1000-grain weight ÷ 1000) × 10. Count the components from a few representative one-square-metre quadrats, enter them here, and read the estimated yield in quintals and tonnes per hectare and the total for your field.
How to use Sunflower Yield Estimator
- 1Count plants in a 1 m² quadrat at several spots and average.
- 2Count the heads per plant and seeds per head, and use the thousand-grain weight (weigh 1000 grains, or use the default).
- 3Read the estimated yield per hectare and for your whole field.
Why use Sunflower Yield Estimator?
- ✓Predicts yield before harvest from simple field counts
- ✓Uses realistic default components for sunflower
- ✓Outputs q/ha, t/ha and total field yield
- ✓Free, instant and fully in-browser
Frequently asked questions
How do I estimate sunflower yield before harvest?+
Use the components of yield: plants/m² × heads per plant × seeds per head gives grains/m²; multiply by the thousand-grain weight ÷ 1000 for grams/m², then ×10 for kg/ha. Sample several quadrats and average for accuracy.
What is a good yield for sunflower?+
Sunflower's single head holds 800–1500 filled seeds at a ~50–70 g thousand-seed weight. Yields vary widely with variety, soil and management — this tool lets you estimate your specific crop rather than rely on a district average.
Why count several quadrats?+
Crops vary across a field. Averaging counts from several representative one-square-metre quadrats (avoiding edges and gaps) gives a far more reliable estimate than a single spot.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline in the field and your data never leaves the device.
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