Sementes grama
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The grass seed calculator helps determine the amount of seeds needed to plant or renovate lawns. It calculates the total weight based on the area in square meters, using a standard rate of 25 grams per square meter (25g/m²). This ensures even distribution and avoids waste or shortage.
The calculation works by multiplying the area by 25g/m². For example, a 10 m² area requires 250g (10×25g). This method is suitable for residential lawns, small gardens, or recreational spaces. The rate may vary depending on grass type and desired density.
Use this tool when purchasing seeds for yards, soccer fields, or open spaces. It’s ideal for projects requiring precise planning, such as landscaping or restoring degraded areas. Always prepare the soil and follow planting guidelines to maximize growth.
Measure the area carefully: include all sections you want to cover. For irregular shapes, divide the area into smaller parts and add their totals. Consult a professional to adjust the dose for specific soil types or harsh climates.
Frequently asked questions
Why use 25g/m² instead of another value?
25g/m² is a common average for garden grasses like St. Augustine. Other species like Bermuda grass may require more or fewer seeds.
How to measure the area correctly?
Use a tape measure for length and width. Multiply to get m². For irregular shapes, divide into simple geometric sections and add them.
Should I add more seeds if the soil is poor?
Yes, infertile or compacted soils may need 10-20% extra seeds to compensate for lower germination rates.
Does this calculator work for all grass types?
No. Recommended density varies by species. Check the seed bag or consult an agricultural technician to adjust values.
Can I use this calculator for already grassed areas?
Yes, for renewal or touch-ups. Apply 25g/m² for thin grass, or up to 35g/m² for full recovery.