Grass Seed Calculator

Estimate the grass seed needed for a new lawn or overseeding project. Choose a seed type, enter your lawn size, and get pounds, bag quantity, and application rate instantly.

1 What are you doing?

2 Choose your grass seed

Grass / seed type General species presets are reference rates. Always follow the label on the seed you purchase.

Application rate (lb per 1,000 sq. ft.) City Mowing overseeding setting: 3 lb per 1,000 sq. ft.

Current calculation rate 3 lb / 1,000 sq. ft.

3 Enter your lawn size

Total lawn area (sq. ft.)

Length (ft)

Width (ft)

For irregular lawns, measure separate sections and add their square footage together for the best estimate.

Lawn area (acres) 1 acre = 43,560 sq. ft.

4 Purchase settings

Seed bag size

Extra seed allowance Optional buffer for edges, overlap, irregular areas, and touch-ups.

Optional seed price per bag ($) Seed materials only—not a City Mowing service quote. Leave blank for quantity only.

Estimated seed requirement

33 lb

including 10% extra

Exact Seed 30 lb

Full Bags 1 × 50 lb

Rate / Acre 130.7 lb

Estimated Seed Cost —

For 10,000 sq. ft. of existing turf at 3 lb per 1,000 sq. ft., the exact application requirement is 30 lb. With a 10% allowance, plan for about 33 lb.

The math: Seed needed = (lawn area ÷ 1,000) × application rate. Optional extra seed is added after the exact application quantity is calculated. Full-bag quantity is always rounded up.

Request an Aeration & Overseeding Quote

Calculator results are estimates, not product-label directions. Seeding rates vary by cultivar, blend, seed coating, germination percentage, lawn condition, and site preparation. Check the seed manufacturer’s label and local recommendations before application.

How much grass seed do you need?

Multiply the lawn area in square feet by the seed-label rate, then divide by 1,000. For example, 10,000 square feet at 3 pounds per 1,000 square feet needs 30 pounds of seed. A 10% purchase allowance brings that to 33 pounds; one 50-pound bag covers that quantity.

New lawn or overseeding?

Overseeding adds seed to existing turf. Starting a new lawn requires the new-lawn rate on your seed label. The two rates are not interchangeable. Measure only the lawn you intend to seed, leaving out buildings, driveways and landscape beds.

Species presets are general planning references, not a recommendation that every listed grass suits your property. Your specific seed label takes priority. You can use a custom rate for your chosen blend.

Prefer professional aeration and overseeding?

City Mowing serves Canton, Akron and communities throughout Stark and Summit counties from North Canton. Request an aeration and overseeding quote based on your property, or explore our lawn care services.

Looking for fertilization and weed control?

Seed quantity is only one part of lawn care. Request a lawn fertilization and weed control quote to discuss treatment options for your lawn.

This calculator runs in your browser without requesting your name, email or address. It does not submit your calculations. Contact us separately when you want a service quote.