Grass Seed Calculator

Choose Measurement Units

Choose Sowing Type

Enter Dimensions

Calculator Guide

Our online grass seed calculator will help you calculate how much seed you require, in kg, for your garden lawn or amenity project.

You can choose different units of measurement and from two types of seeding. We have split this into sowing, which is for new gardens and overseeding which can be used to rejuvenate a tired lawn.

  1. Choose the unit of measurement, you can select from metres, feet or yards.
  2. Choose the seeding type, you can select from sowing or overseeding.
  3. Enter the length and width of the area you wish to seed.
  4. Click on the ‘Calculate’ button and you will see the area, in m², the chosen sowing rate and the amount of seed you require, in kg.