Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Grass seed needed
44.0
Estimated seed cost
$264
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter lawn area (sqft).
- 2Enter coverage per lb (new lawn rate) (sqft).
- 3Enter price per lb of seed ($).
- 4Read your grass seed needed on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
A quarter acre (about 10,890 square feet) is a common suburban lot size. This calculator defaults to that area and a typical overseeding rate, then returns the pounds of seed you need to buy and the total cost, adjustable for new-lawn seeding rates versus thinner overseeding rates.
Worked example
Using the values the calculator loads with:
Inputs
- Lawn area: 10890 sqft
- Coverage per lb (new lawn rate): 250 sqft
- Price per lb of seed: 6 $
Results
- Grass seed needed: 44
- Estimated seed cost: $264
What each field means
Inputs
- Lawn area (sqft)
- The lawn area used in the calculation, measured in sqft. Starts at 10890 sqft so you have a working example on load.
- Coverage per lb (new lawn rate) (sqft)
- The coverage per lb (new lawn rate) used in the calculation, measured in sqft. Starts at 250 sqft so you have a working example on load.
- Price per lb of seed ($)
- The price per lb of seed used in the calculation, measured in $. Starts at 6 $ so you have a working example on load.
Results
- Grass seed needed
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Estimated seed cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How much grass seed do I need for a 1/4 acre lawn?
At a typical new-lawn rate of 250 sqft coverage per pound, a quarter acre (10,890 sqft) needs about 44 pounds of seed.
Does overseeding need less seed than a new lawn?
Yes, overseeding an existing lawn typically uses half the new-lawn rate, so increase the coverage-per-lb field to roughly 500 sqft per lb for overseeding jobs.
Why does seed coverage vary by grass species?
Seed size differs dramatically between species — fine fescue seeds are much smaller than tall fescue or ryegrass, so always follow the specific product's label rate rather than a generic average.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Quarter Acre Grass Seed Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/quarter-acre-grass-seed-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/quarter-acre-grass-seed-calculator" target="_blank" rel="noopener">Quarter Acre Grass Seed Calculator — RevenueLab</a> (2026).</p>
Source: [Quarter Acre Grass Seed Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/quarter-acre-grass-seed-calculator) (2026).