Seed quantity calculator
Estimate seed count, mass and packets from your planting target, germination and establishment assumptions.
Maximum 1 billion calculated seeds. This is an expectation-based quantity, not a guarantee of the final stand. The tool does not infer seed species, weight or germination. Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.
Your result
How to use Seed quantity calculator
- Enter your measured quantities, units and assumptions.
- Review the calculated result and the stated limits.
- Download the report or plan for your project.
Useful next steps
Describe the target stand
Enter planting stations and the desired established seedlings per station. Germination and later establishment are separate percentages, so the calculator accounts for both.
Convert the sowing quantity
Add an optional allowance, then enter measured thousand-seed weight and seeds per packet. The report shows seeds to sow, estimated mass, packets and spare purchased seeds.
Save the measurements and assumptions
Download CSV and a text or JSON report. The calculation runs on your device. Changing a unit keeps the number you entered, so check both before using the result.