Seed Spacing Calculator
Plan a planting grid and know how many plants your bed will hold before you open a seed packet. Enter the bed length and width in inches along with the spacing you want between plants in a row and between rows, and the calculator lays out a rectangular grid to count the plants that fit. It then works backward from your target plant count using an expected germination rate so you know how many seeds to sow to hit that number after thinning. Tight spacing raises yield per square foot but reduces airflow, so match the numbers to the crop on your seed packet. Everything is calculated instantly in your browser, letting you test different spacings and bed sizes in seconds with no signup.
How to use Seed Spacing Calculator
- Enter the bed length and width.
- Enter the spacing between plants and between rows.
- Enter your expected germination rate as a percent.
- Read how many plants fit and how many seeds to sow.
Frequently asked questions
How does it find how many plants fit a bed?
It divides the bed length and width by your plant and row spacing to get plants per row and rows per bed, then multiplies for the total.
Why enter a germination rate?
Not every seed sprouts, so dividing the plants you need by the germination rate tells you how many seeds to sow to end up with enough plants.
Does closer spacing always mean more harvest?
Not necessarily; crowding plants beyond their recommended spacing can reduce airflow and size, so use the spacing your crop actually needs.
What is Seed Spacing Calculator?
Plan a planting grid and know how many plants your bed will hold before you open a seed packet. Enter the bed length and width in inches along with the spacing you want between plants in a row and between rows, and the calculator lays out a rectangular grid to count the plants that fit.
Is Seed Spacing Calculator free to use?
Yes. Seed Spacing Calculator is completely free, with no sign-up and no usage limits.
Does Seed Spacing Calculator work in a web browser?
Yes. Seed Spacing Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Seed Spacing Calculator?
Yes. Seed Spacing Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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