Grass Seed Calculator
Estimate grass seed needed from lawn area and the product application rate.
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About Grass Seed Calculator
Grass Seed Calculator estimates grass seed weight in kilograms required for sowing new lawns or overseeding existing garden lawns.
How to use Grass Seed Calculator
- Enter lawn length and width to calculate total area in square metres.
- Select sowing purpose: New Lawn (approx 35g/m²) or Overseeding (approx 25g/m²).
- Click Calculate to estimate grass seed weight in kg.
- Review recommended seed bag purchasing sizes.
Examples
Lawn Area: 100m², Purpose: New Lawn (35g/m²) Result: 3.50 kg of grass seed required.
FAQ
What is the difference in seed quantity between new lawns and overseeding?
Establishing a new lawn requires a higher seed density (35-50g/m²), whereas overseeding an existing lawn requires less (20-25g/m²).
When is the best time to sow grass seed?
Early autumn and mid-spring provide optimal soil temperature and moisture for grass seed germination.