Seed Germination Percentage Calculator
Calculate seed germination percentage from a test, and judge if the lot is fit to sow.
Germination % = (seeds germinated ÷ seeds tested) × 100. Test ~100 seeds on moist paper or in trays. Most certified seed must exceed 70–85% germination; below that, increase the seed rate or replace the lot.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers and agronomists use the free Seed Germination Percentage Calculator for an accurate answer in seconds — no formulas to remember, works offline.
About Seed Germination Percentage Calculator
Before sowing a seed lot — especially saved or old seed — a quick germination test tells you whether it is worth planting and what seed rate to use. Put a counted sample (about 100 seeds) on moist germination paper or in trays, keep them warm and moist, and count how many sprout. This tool turns that count into a germination percentage and a plain verdict, so you can adjust the seed rate or reject a weak lot before it costs you a poor stand.
How to use Seed Germination Percentage Calculator
- 1Enter your values into the inputs.
- 2Read the headline result and the supporting breakdown.
- 3Apply the guidance in the note to your decision.
Why use Seed Germination Percentage Calculator?
- ✓Uses the standard, citable agronomy formula
- ✓Clear inputs with sensible defaults
- ✓Instant result with the working shown
- ✓Free, fully in-browser and private
Frequently asked questions
How do I do a seed germination test?+
Count out about 100 seeds, place them between layers of moist paper or in a tray of moist medium, keep them warm (20–30°C) and moist for the species' germination period, then count how many sprout. Germination % = germinated ÷ tested × 100.
What germination percentage is acceptable?+
Most certified seed must exceed 70–85% depending on the crop. Above ~85% is good; 70–85% is usable with a higher seed rate to compensate; below 70% the lot is generally not worth sowing.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline and your data never leaves the device.
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