Home & Life · Free tool
Seed Spacing Calculator
How many plants fit a bed, how many seeds to buy. Row and square-foot-garden layouts.
Updated April 2026
Plants that fit
8
32 sq ft bed
Seeds to buy (2x for thinning)
16
Spacing reference
Tomatoes: 24" between plants, 24" between rows — or 1 plant per square foot (SFG method).
Diagram (approximate)
Bed: 8ft x 4ft | 8 tomatoes x x x x x x
SFG (square-foot garden) packs more in a small bed but needs rich soil. Traditional rows are easier to weed with a hoe. Seed counts assume 50% germination — buy more if your seed is old.
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What it does
Bed dimensions + crop = plants that fit, seeds to buy (2x for thinning), spacing diagram.
Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/seed-spacing-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Seed Spacing Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Enter bed dimensions.
- Pick crop + layout.
- Read plants + seeds.
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