SettingsSettings for this calculationUS
The length of the area to be seeded.
For irregular lawns, break the area into rectangles and add them together.
Tools needed: Tape measure or measuring wheel
The width of the area to be seeded.
Measure perpendicular to the length.
Tools needed: Tape measure
Printed on your grass seed product's label — varies a lot by species. In metric terms, 5 lb per 1,000 sq ft is about 24 g/m².
Fine fescues and many cool-season blends run 5-8 lb/1,000 sq ft (24-39 g/m²) for new lawns; check your specific product, especially for overseeding (which uses a lower rate) vs new lawn establishment.
Estimated grass seed needed
4.29 lb of seed
- Lawn area
- 858 sq ft
They open the calculator with your figures already in it
Grass Seed Calculator: 4.29 lb of seed — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
Show calculation logicHide calculation logic
How this was calculated
Formula source(s)
- Seeding rates vary significantly by grass species (roughly 2-8 lb per 1,000 sq ft) — always use the rate printed on your specific product label
Inputs used
- Lawn Length
- 33 ft
- Lawn Width
- 26 ft
- Seeding Rate (lb per 1,000 sq ft)
- 5
Intermediate steps
- Lawn area
- 858 sq ft
What this calculation does not cover
- Area is a single length × width rectangle, so a flower bed, path, tree ring or patio sitting inside the measured footprint is still counted as seedable lawn; an irregular garden has to be split into rectangles and the separate runs added up by hand.
- Only the seeding-rate box is frozen in lb per 1,000 sq ft (93 m²) — that field carries no dimension, so the metric/imperial switch skips it, while the lawn dimensions and the headline weight both follow the system you pick; the 24 g/m² figure in its help text is a reference note, not a second entry box.
- The rate you type multiplies the whole lawn at once, so a shaded strip you would sow heavier, or a thin patch you are only overseeding, needs its own separate run rather than one blended figure.
- Nothing is added on top of area × rate: no spreader overlap or calibration spill, no seed lost to wash-off on a slope or taken by birds, and no rounding up to the bag sizes seed is actually sold in, so buy the next bag up rather than the bare decimal shown.
- Weight here is bulk product weight, not live seed — the germination percentage and purity printed on the lot's tag never enter the arithmetic, so a tired bag and a fresh one of the same species give very different stands at the same label rate.
- Entries outside the accepted range are pulled back when you leave the field, with a notice saying so: the rate is held between 1 and 10 lb (4.5 kg) per 1,000 sq ft (93 m²) and each side of the lawn to 200 m (about 656 ft), so a very light sowing or a paddock-sized run is recomputed at the nearest limit instead of as typed.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-05 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- Seeding rates vary significantly by grass species (roughly 2-8 lb per 1,000 sq ft) — always use the rate printed on your specific product label
Cite this page
Your workspace
Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.