Laboratory germination
Mistake: Entering 0.5 when you mean 50%.
Fix: Enter 50 for 50%; 0.5 represents 0.5%.
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Seed-lot sowing planner
Convert a target stand and measured seed-lot quality into kg/ha and total seed mass.
This tool is archived. Recheck its method and dated data before use.
01Enter your values
Runs in your browserRuns offline in your browser. Once the page and required files have loaded, processing needs no internet.
02Seed-lot sowing planner
Runs in your browser
How it works
Convert a target stand and measured seed-lot quality into kg/ha and total seed mass.
N = P / (g × s); kg/ha = N × W / 100; kg = kg/ha × ha
Runs in your browser
Discovery source
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Convert a target stand and measured seed-lot quality into kg/ha and total seed mass.
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area. Required seed count equals target divided by both percentage fractions. Convert with seed weight. No crop recommendation, mixtures, coating correction or machine calibration.
- Enter your values
- Target plants per m²
- Thousand-seed weight
- Laboratory germination
- Field survival of germinated seeds
- Field area
- Calculation method
N = P / (g × s); kg/ha = N × W / 100; kg = kg/ha × ha
- Example scenario · Result
131.578947 kg/ha
Calculation method
- For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
- Required seed count equals target divided by both percentage fractions.
- Convert with seed weight.
- No crop recommendation, mixtures, coating correction or machine calibration.
N = P / (g × s); kg/ha = N × W / 100; kg = kg/ha × ha
Seed-lot sowing planner
- Target plants per m²
- 250
- Thousand-seed weight
- 40 g
- Laboratory germination
- 95 %
- Field survival of germinated seeds
- 80 %
- Field area
- 10 ha
Result
131.578947 kg/ha
Frequently asked questions
Does field survival already include germination?
No. Enter the fraction surviving after germination; otherwise losses are counted twice. Use a suitable local agronomic target.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.
Terms and definitions
Enter your values
- Measurement system
The initial choice follows your browser region. Your choice is remembered on this device. Gallons are US gallons. Switching units keeps your numbers unchanged and interprets them in the new unit.
Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
- Target plants per m²
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Enter a numerical value for this quantity. Use the unit shown beside this field. 1/m² / 1/ft²
Minimum: 0.01 · Maximum: 100000 1/m²
- Thousand-seed weight
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Enter a numerical value for this quantity. Use the unit shown beside this field. g / oz
Minimum: 0.001 · Maximum: 10000 g
- Laboratory germination
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Enter a percentage, not its decimal fraction: 50 means 50%. Use the unit shown beside this field. %
Minimum: 0.1 · Maximum: 100 %
- Field survival of germinated seeds
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Enter a percentage, not its decimal fraction: 50 means 50%. Use the unit shown beside this field. %
Minimum: 0.1 · Maximum: 100 %
- Field area
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Enter a numerical value for this quantity. Use the unit shown beside this field. ha / ac
Minimum: 0.0001 · Maximum: 1000000 ha
Result
- Result
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area. Required seed count equals target divided by both percentage fractions. Convert with seed weight. No crop recommendation, mixtures, coating correction or machine calibration.
Calculated from your entries using the method below.
- Seeds per m²
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Calculated from your entries using the method below.
- Total seed mass
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area.
Calculated from your entries using the method below.
- Value
For growers using a cleaned, single seed lot: enter the agronomic target, thousand-seed weight, tested germination, expected survival of germinated seeds and area. Required seed count equals target divided by both percentage fractions. Convert with seed weight. No crop recommendation, mixtures, coating correction or machine calibration.
Calculated from your entries using the method below.
Common mistakes and quick fixes
Target plants per m² · Thousand-seed weight · Laboratory germination
Mistake: Changing units and assuming the entered numbers were converted.
Fix: Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
Does field survival already include germination?
Mistake: Treating a result as valid outside the described scope.
Fix: No. Enter the fraction surviving after germination; otherwise losses are counted twice. Use a suitable local agronomic target.
Limits and key assumptions
- No. Enter the fraction surviving after germination; otherwise losses are counted twice. Use a suitable local agronomic target.
- No crop recommendation, mixtures, coating correction or machine calibration.
- Displayed results may be rounded; rounding does not add measurement precision.