Seed Calculator
Calculate how many seeds you need to plant for your garden size.
Garden Area
50%75%100%
Fresh seeds: 85-95%. Old seeds: 50-70%.
Seeds Needed
39
0.1 g (39 seeds)
Expected Plants
25
at 85% germination
Garden Area
100.0
square feet
Packets Needed
1
~50 seeds/packet
Est. Cost
$3.50
at ~$3.50/packet
Spacing
24 inches between plants
Planting Timing
Start indoors 6-8 weeks before last frost
Seed Buying Tips
Buying Seeds
- - Buy from reputable seed companies
- - Check the "packed for" date
- - Consider open-pollinated/heirloom for seed saving
- - Buy extra for succession planting
Storage
- - Store in cool, dry, dark place
- - Refrigerator storage extends life
- - Most seeds last 2-4 years
- - Test germination of old seeds
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.