Seed Rate Calculator
Calculate optimal seeding rates
Optional: Field Area & Cost Calculation
Seed Rate Calculator
Calculate the optimal seeding rate for your crops based on target plant population, thousand grain weight (TGW), germination rate, and field conditions. This tool helps farmers determine the exact amount of seed needed for planting.
How It Works
Pro Tips
- •Add 10-20% extra seeds to account for field losses and uneven germination
- •Consider soil conditions, weather, and pest pressure when setting target population
- •Use certified seed with known TGW and germination rates for best accuracy
- •Adjust seeding rates based on planting date and variety characteristics
Common Crop References
Why Use Our Seed Rate Calculator?
Precise Calculations
Get accurate seeding rates based on scientific formulas and crop-specific parameters.
Crop Optimized
Tailored for various crop types with built-in reference values for common varieties.
Save Time & Money
Avoid over-seeding or under-seeding, optimizing both costs and crop establishment.
Easy to Use
Simple interface with helpful tooltips and reference values for quick calculations.
Multiple Units
Support for both metric and imperial units to match your farming practices.
Professional Results
Get detailed results including seed weight, planting density, and cost estimates.
Frequently Asked Questions
What is thousand grain weight (TGW)?
TGW is the weight of 1,000 seeds of a particular variety, usually measured in grams. It's a key parameter for calculating seeding rates.
How do I determine the right plant population?
Plant population depends on crop type, variety, growing conditions, and management practices. Consult seed company recommendations or local extension services.
Should I account for germination failure?
Yes, always use the actual germination rate from seed testing. If unknown, use conservative estimates and consider adding 10-20% extra seeds.
Can this calculator work for all crops?
This calculator works for most field crops. For specialty crops or unique planting methods, consult crop-specific guidelines.
How accurate are the calculations?
The calculations are based on standard agricultural formulas and are highly accurate when correct input values are provided.
What units does the calculator support?
The calculator supports both metric (hectares, kg) and imperial (acres, pounds) units for global compatibility.
Try GLandGo Field Measure App
For more advanced and comprehensive measurement features—includingGPS area,distance,perimeter,SHP/GeoJSON import/export, and more—download our GLandGo Field Measure app.
Perfect for land surveyors, farmers, real estate professionals, and anyone needing precise field measurements.
