Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Expected-value planning, not a probabilistic guarantee. Germination and later survival are separate multiplicative fractions.
Example Calculation
- Established plants wanted: 80
- Expected germination: 80 %
- Post-germination survival: 80 %
Established plants wanted = 80; Expected germination = 80; Post-germination survival = 80. Primary result: 125.
Frequently asked questions
How do I use this calculator?
Enter established plants wanted, expected germination, post-germination survival. The result updates automatically. Use Reset to restore the example values.
What method does it use?
seeds=ceil(target/(germination ×survival)).. Expected-value planning, not a probabilistic guarantee. Germination and later survival are separate multiplicative fractions.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.