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Lawn Area Calculator

Calculate lawn area for any shape โ€” rectangle, circle, triangle, L-shape, or custom. Get seed and sod estimates for your yard size.

Add multiple zones for complex yard shapes
Total Lawn Area
0 sq ft
Seed (New Lawn)
โ€” lbs
โ€” kg
Seed (Overseed)
โ€” lbs
โ€” kg

๐ŸŒฑ Sod Estimate

Sod Rolls (10 sq ft each)
โ€”
+5% waste included
Pallets (~500 sq ft each)
โ€”

Grass Seed Coverage Reference

New lawn 4-5 lbs / 1,000 sq ft
Overseeding 2-3 lbs / 1,000 sq ft
Sod roll (US) 2 ร— 5 ft = 10 sq ft
Sod pallet ~450-700 sq ft

About This Tool

Laying new grass or overseeding your lawn? First you need to know the area โ€” and most yards aren't simple rectangles. This calculator handles any shape and tells you exactly how much seed or sod to buy. Add multiple zones to build up complex yard shapes: rectangles, circles, triangles, and L-shapes. Subtract areas for patios, driveways, or flower beds. The calculator totals everything and converts to grass seed weight or sod rolls based on your coverage needs. Whether you're seeding a small patch or sodding an entire backyard, this tool gives you accurate material estimates so you buy the right amount โ€” not too much, not too little.

How to Use

1. Add a zone and select its shape (rectangle, circle, triangle, L-shape) 2. Enter dimensions for that zone 3. Add more zones for complex yards โ€” they'll be summed together 4. Use "subtract" mode for areas to exclude (patio, driveway, beds) 5. Set your seed coverage rate or sod roll size 6. View total area and material estimates 7. Click "Copy Link" to save your calculation

Formula

Rectangle: A = L ร— W Circle: A = ฯ€ ร— rยฒ Triangle: A = ยฝ ร— base ร— height L-shape: Split into two rectangles Grass seed coverage (typical): New lawn: 1 lb per 200-300 sq ft Overseeding: 1 lb per 400-500 sq ft Sod rolls (standard): US: 2 ft ร— 5 ft = 10 sq ft per roll UK: 1 m ร— 0.4 m = 0.4 mยฒ per roll

Frequently Asked Questions

How do I calculate lawn area in square feet?
For a rectangle, multiply length ร— width in feet. For example, 50 ft ร— 30 ft = 1,500 sq ft. For circles, measure the diameter, divide by 2 to get radius, then use ฯ€ ร— rยฒ. For irregular shapes, break them into simpler shapes (rectangles, triangles) and add them up.
How much grass seed do I need per square foot?
For a new lawn, use 1 lb of seed per 200-300 sq ft (about 4-5 lbs per 1,000 sq ft). For overseeding an existing lawn, use 1 lb per 400-500 sq ft (2-2.5 lbs per 1,000 sq ft). Check your seed bag โ€” coverage rates vary by grass type.
How many sod rolls for 1,000 square feet?
Standard US sod rolls are 2 ft ร— 5 ft = 10 sq ft each. For 1,000 sq ft, you need 100 rolls. Add 5-10% extra for cuts and waste, so order 105-110 rolls. Pallet sizes vary โ€” typically 450-700 sq ft per pallet.
How do I measure an L-shaped lawn?
Split the L-shape into two rectangles. Measure each rectangle's length and width, calculate their areas separately, and add them together. For example, if one part is 20ร—30 ft and the other is 15ร—25 ft, total area = 600 + 375 = 975 sq ft.
How do I subtract areas for a patio or driveway?
Calculate your total lawn area, then calculate the patio/driveway area and subtract it. This calculator has a 'subtract' mode โ€” add the patio as a zone with subtract enabled, and it will be deducted from the total automatically.
How much does sod cost per square foot?
Sod typically costs $0.30-0.80 per sq ft for the material, plus $1-2 per sq ft for professional installation. A 1,000 sq ft lawn costs $300-800 for sod material, or $1,300-2,800 installed. Prices vary by grass type and region.
Should I seed or sod my lawn?
Seeding is cheaper ($0.05-0.20/sq ft) but takes 2-3 months to establish. Sodding costs more ($0.30-0.80/sq ft) but gives instant results. Choose sod for slopes, high-traffic areas, or if you need quick results. Choose seed for large areas on a budget or if you want specific grass varieties.

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