Seed Quantity
Work out seed count and grams needed for a planting area.
About Seed Quantity
The grid of possible plant positions is multiplied by seeds per hole plus a ten percent buffer for misses. Knowing the seed count keeps you from buying far more seed than the bed can actually hold.
Formula
Seed Quantity
Plants = floor(bed length/spacing) x floor(width/spacing); seed weight = seeds / ~300 per gram
- overage
- 10% extra seeds to allow for failures
Worked example
With the default values below, Seed Quantity returns Plants Possible of 160. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Bed lengthminimum 1 ft
- 10 ft
- Bed widthminimum 1 in
- 48 in
- Spacingminimum 0.1 in
- 6 in
- Seeds per holeminimum 1
- 1
Results
- Plants Possible
- 160
- Seeds Needed
- 176
- Seed Weight
- 0.59 g
Step by step
- 1Values used
- 2Seed Quantity
- 3Plants Possible= 160
- 4Seeds Needed= 176
- 5Seed Weight= 0.59 g
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Seed Quantity calculated?
Plants = floor(bed length/spacing) x floor(width/spacing); seed weight = seeds / ~300 per gram The grid of possible plant positions is multiplied by seeds per hole plus a ten percent buffer for misses.
Why does Seed Quantity matter?
Knowing the seed count keeps you from buying far more seed than the bed can actually hold.
What values do I need to enter?
This calculator takes 4 inputs: Bed length, Bed width, Spacing, Seeds per hole. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.