Grass Seed Calculator – Lawn Coverage
Calculate grass seed needed for your lawn area
Table of Contents
How to Use
- Enter the length of your lawn area
- Enter the width of your lawn area
- Select your measurement unit (square feet or square meters)
- Enter the recommended seed rate per 1000 sq ft/m
- Click calculate to see how much seed you need
What is Seed Rate?
Seed rate is the recommended amount of grass seed to apply per unit area, typically measured in pounds per 1000 square feet or kilograms per 1000 square meters. Different grass types have different recommended seed rates.
Using the correct seed rate ensures optimal lawn coverage without wasting seed or creating overcrowded conditions that can lead to disease.
Common Grass Seed Rates
| Grass Type | Seed Rate (lbs/1000 sq ft) | Seed Rate (kg/1000 sq m) |
|---|---|---|
| Kentucky Bluegrass | 2-3 | 10-15 |
| Perennial Ryegrass | 5-7 | 25-35 |
| Tall Fescue | 6-8 | 30-40 |
| Fine Fescue | 3-5 | 15-25 |
| Bermuda Grass | 1-2 | 5-10 |
Tips for Successful Seeding
- Prepare the soil by removing debris and loosening the top layer
- Apply seed evenly using a spreader for best results
- Lightly rake seed into the soil for good seed-to-soil contact
- Water frequently but lightly until grass is established
- Avoid heavy foot traffic until grass reaches mowing height
- Consider overseeding by 10-20% for better coverage
- Best seeding times are spring and fall for most grass types
Frequently Asked Questions
- How do I know what seed rate to use?
- Check the seed package for the manufacturer's recommended rate. Rates vary by grass type, with fine grasses like Kentucky Bluegrass needing less seed (2-3 lbs/1000 sq ft) and coarser grasses like Tall Fescue needing more (6-8 lbs/1000 sq ft).
- Should I buy extra seed beyond the calculated amount?
- Yes, it's recommended to purchase 10-20% more seed than calculated to account for uneven spreading, birds eating seed, and areas that may need reseeding.
- Can I use this calculator for overseeding?
- For overseeding an existing lawn, use 50-75% of the new lawn seed rate. This calculator shows the full rate, so reduce the result accordingly for overseeding projects.
- When is the best time to seed my lawn?
- For cool-season grasses, early fall or spring are best. For warm-season grasses, late spring or early summer work well. Avoid seeding during extreme heat or cold.
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