Onion Yield Per Acre Calculator
Estimate onion yield per acre and per hectare from plant spacing and yield per plant.
An onion plant yields one bulb of 80–120 g, so population drives the per-hectare yield. The tool derives plant population from your spacing, so tightening spacing or raising per-plant yield both lift the per-hectare total.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Growers and buyers use the free Onion Yield Per Acre Calculator to project production from spacing and per-plant yield — useful for planning harvest, labour and sales.
About Onion Yield Per Acre Calculator
Estimate your onion production from two things you control: how densely the crop is planted and how much each plant yields. An onion plant yields one bulb of 80–120 g, so population drives the per-hectare yield. The tool first derives plant population — plants per hectare = 10,000 ÷ (row spacing × plant spacing) — then multiplies by the yield per plant to give kilograms per hectare, per acre and for your whole field. Adjust the inputs to see how closer spacing or better per-plant yield changes the total.
How to use Onion Yield Per Acre Calculator
- 1Enter your row spacing and plant spacing in metres.
- 2Enter the expected yield per plant (or use the default).
- 3Read the estimated yield per hectare, per acre and for your field.
Why use Onion Yield Per Acre Calculator?
- ✓Derives plant population from your row and plant spacing
- ✓Uses a realistic per-plant yield for onion
- ✓Outputs per-hectare, per-acre and total field yield
- ✓Free, instant and fully in-browser
Frequently asked questions
How do I calculate onion yield per acre?+
Find plant population (10,000 ÷ row × plant spacing per hectare, then ×0.4047 for an acre), and multiply by the yield per plant. This tool does both from your spacing and per-plant yield.
What yield can I expect per plant of onion?+
An onion plant yields one bulb of 80–120 g, so population drives the per-hectare yield. Variety, nutrition, water and pest control all shift this, so enter your own expected figure for a tailored estimate.
Does closer spacing always increase yield?+
Up to a point — more plants per hectare raise yield until competition for light, water and nutrients reduces per-plant yield. Use the optimum spacing recommended for onion in your conditions.
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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