Grass Seed Calculator
Multiply lawn area by a rate you choose for the seed and planting method.
Formula
kg = area (m²) × rate (g/m²) ÷ 1,000; lb = area (ft²) × rate (lb/1,000 ft²) ÷ 1,000.
Net lawn area: 1,000 ft² · Seed in pounds ≈ (1,000 ft² × 0.09290304 m²/ft²)÷92.90304×(5) · Seed mass ≈ (5)×0.45359237
How to use
- Enter the net area to seed.
- Enter the package rate and its unit.
- Read the seed weight in kg and lb.
Examples
- 100 m² at a chosen 25 g/m² needs 2.5 kg.
Frequently asked questions
Is the default rate a recommendation?
No. It is an example. Use the label or local guidance for your species, site and new lawn or overseeding.
Does this adjust for germination?
No. Enter the bulk-seed rate to buy, already adjusted for purity and germination if needed.
How do I handle an irregular lawn?
Add the planted areas and exclude paths, buildings and other unseeded spaces.
Sources
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