Landscaping calculator

Grass seed

Pounds of seed from lawn area and the labelled rate per 1,000 square feet.

Reviewed formula · v1.0.0

Project inputs

Enter field measurements. Imperial lengths take feet and inches. Unit conversion happens before the reviewed formula is applied.

Lawn lengthft + inFinished lawn lengthftinLawn widthft + inAverage finished lawn widthftinRate per 1,000 ft²lb / 1,000 ft²New lawn often 4–8 lb/1,000 ft²; overseed often 2–3. Read the bagWaste factor%Allowance for overlap at edges and irregular beds

All values can be refined when you edit the estimate. This tool does not replace field verification or local requirements.

Calculated result

11lb

Seed to buy

FormulaLND-SED-001

area ÷ 1,000 × rate × (1 + waste)

2000 ft²

Lawn area

10.5 lb

Seed before rounding

Transparent cost view

Planning rates only. Pick a currency — badges, inputs, and totals follow. Material is a rate. Labour is hours × a planning hourly rate. Equipment and delivery are this-job amounts.

Material ratePlanning · per calculated unit · USDEquipmentPlanning · this job · USDDeliveryPlanning · this job · USDLabour hoursPlanning · this jobLabour ratePlanning · per hour · USDOverhead %%Contingency %%Markup %%Tax %%

Planning defaults are office figures, not a bid. US ready-mix in 2026 often lands around $125–165 per cubic yard delivered; place-and-finish commonly $2–4 per square foot. Replace every rate with a supplier or crew quote before you send the letter.

Indicative FX as of Aug 2026. Planning conversion, not a live bank rate.

Material costUSD 935

Labour (8 h)USD 280

Direct costUSD 1,325

Overhead + contingencyUSD 133

Markup + taxUSD 175

Estimated project totalUSD 1,632

View estimate Quote / invoice Add another item

Embed this calculator

<iframe src="https://construclytic.com/embed/grass-seed" title="Grass seed" width="100%" height="820" loading="lazy" referrerpolicy="strict-origin-when-cross-origin" style="border:1px solid #d7e0da;border-radius:16px;background:#fff;"></iframe>

Paste on a contractor site or blog. The iframe is a planning takeoff, not a bid.

How this calculator works

A transparent grass seed takeoff.

Lawn area divided by 1,000, times the labelled seeding rate, times a small overlap allowance, then rounded up to the next pound.

Worked example. Example: a 50 × 40 ft lawn is 2,000 ft². At 5 lb per 1,000 ft² with 5% waste the order rounds to 11 lb.

1. Measure the lawn you will seed, minus beds and pavement.
2. Enter the rate from the bag for new lawn or overseed — they are not the same.
3. Keep starter fertilizer, straw and water as separate lines.

Need the broader workflow? Read the landscaping planning guide.

Questions

Questions about grass seed

New lawn or overseed?

New lawn is often 4–8 lb/1,000 ft². Overseed is often 2–3. The bag wins.

Does this include sod?

No. Use the sod calculator for rolls. This page is seed only.

What is the formula ID?

This calculator publishes formula LND-SED-001, version 1.0.0. The ID stays on the result and on the estimate line.

Is this engineering advice?

No. Construclytic is a planning website, not a registered engineering or contracting firm. Field checks, codes and product data still sit with you.

Does Construclytic fetch live supplier prices?

No. Costs use the rate you enter. Construclytic does not fetch live supplier prices.