Grass Seed Calculator

Buying the right amount of grass seed starts with knowing your lawn's size and the specific grass variety you're planting. Select your lawn shape (rectangle, circle, ellipse, or triangle) and enter its dimensions, then choose your grass type and whether you're starting a new lawn or overseeding to get the exact seed needed in pounds. Secondary outputs include your total lawn area, coverage rate, and total acreage.

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Seeding Type *

Results

Seed Needed

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Total Lawn Area

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Coverage Rate

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Total Acres

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Frequently Asked Questions

How do I use the grass seed calculator?

Simply select your lawn shape, enter the dimensions, choose your grass type, and specify whether it's for a new lawn or overseeding. The calculator will instantly show you how much seed you need.

What is the coverage rate for grass seed?

Coverage rate varies by grass type and seeding method. For new lawns, rates typically range from 2-8 lbs per 1,000 sq ft. Overseeding uses about half the amount of a new lawn installation.

How much seed do I need for overseeding vs. new lawn?

New lawns require about twice as much seed as overseeding. For example, if a new Kentucky Bluegrass lawn needs 4 lbs per 1,000 sq ft, overseeding would need about 2 lbs per 1,000 sq ft.

Which grass type is best for my area?

Cool-season grasses like Kentucky Bluegrass and Tall Fescue work well in northern climates. Warm-season grasses like Bermuda and Zoysia are better for southern regions. Consider your climate zone and lawn usage.

How accurate is this grass seed calculator?

This calculator provides estimates based on standard seeding rates. Actual needs may vary based on soil conditions, climate, and specific seed varieties. Always consult seed package instructions for best results.

Should I buy extra seed beyond the calculated amount?

Yes, it's recommended to purchase 10-15% extra seed to account for uneven application, poor germination areas, or future touch-ups. This ensures you have enough seed to achieve uniform coverage.

What's the difference between grass seed types?

Kentucky Bluegrass creates dense, dark green lawns but needs more water. Tall Fescue is drought-tolerant and durable. Perennial Ryegrass establishes quickly. Fine Fescue works well in shade and low-maintenance areas.

When is the best time to plant grass seed?

Cool-season grasses are best planted in early fall or spring when temperatures are moderate. Warm-season grasses should be planted in late spring or early summer when soil temperatures reach 65-70°F consistently.