The Everything CalculatorCalculate, compare, and decide with confidence.Calculate, Compare, Decide

Sod / Grass Seed Calculator

Lawn Area

300 sq ft

The Numbers

  • Sod: 1 standard pallets (~450 sq ft each)
  • Grass seed: ~1.2 lbs at your entered rate

Project Analysis

  • Lawn size: small yard, border, or patch repair.

Recommendations

  • Water new sod immediately after laying it and keep it consistently moist for the first 2-3 weeks until the roots establish into the soil below.
  • New grass seed needs frequent, light watering (often more than once a day) until it germinates, then can shift to deeper, less frequent watering as it establishes.
  • Both sod and seed establish best during your grass type's active growing season (typically spring or early fall in most regions) rather than the height of summer heat.

Compare Calculations

Downloads

Includes your inputs and results for this calculation, plus any additional calculations you've compared.

How This Calculator Works

Lawn area is your yard’s length multiplied by its width, converted into the two units sod and grass seed are actually sold in: sod pallets and pounds of seed. Enter your lawn’s length and width and this calculator returns the area plus how many sod pallets you’d need to lay it as instant lawn, or how many pounds of grass seed at your entered rate to seed it instead — whichever approach you’re planning.

Sod and grass seed serve the same goal (a new or repaired lawn) in very different ways: sod gives you an established lawn almost immediately but costs more and needs careful watering while the roots knit into the soil below, while seed is cheaper and lets you pick from a wider range of grass species but takes weeks to establish and needs more attentive early watering.

The Formula

Area=Length×Width\vD{\text{Area}} = \vA{\text{Length}} \times \vB{\text{Width}} Sod Pallets Needed=⌈Area in sq ft450⌉\text{Sod Pallets Needed} = \left\lceil \frac{\vD{\text{Area}} \text{ in sq ft}}{450} \right\rceil

Rounded up since sod is sold in whole pallets — 450 sq ft per pallet is a commonly cited standard coverage, though individual suppliers do vary (roughly 400-500 sq ft), so confirm your supplier’s own pallet size before ordering.

Grass Seed Needed=Area in sq ft1,000×Seed Rate\text{Grass Seed Needed} = \frac{\vD{\text{Area}} \text{ in sq ft}}{1{,}000} \times \vC{\text{Seed Rate}}

Using whatever rate (in pounds per 1,000 sq ft) your specific seed product’s own label recommends — this varies a lot by grass species and whether you’re seeding bare soil or overseeding an existing lawn, which is why it’s a field you can adjust above rather than a fixed number.

This calculator deliberately doesn’t estimate a cost range — like this site’s other material calculators, both sod and grass seed pricing vary too much by region, species, and supplier for a single illustrative figure to be trustworthy. Check pricing with your local supplier or garden center for what you’re actually buying.

Worked Example

A 20ft x 15ft yard, seeding at the default 4 lb per 1,000 sq ft rate:

  1. Area: 20×15=300 sq ft\vA{20} \times \vB{15} = \vD{300} \text{ sq ft}.
  2. Sod Pallets Needed: ⌈300/450⌉=1\lceil \vD{300} / 450 \rceil = 1 pallet.
  3. Grass Seed Needed: (300/1,000)×4=1.2(\vD{300} / 1{,}000) \times \vC{4} = 1.2 lbs.
  4. At 300 sq ft, this is a small yard, border, or patch-repair size project.

Source: Commonly Cited Sod Pallet Coverage (~450 sq ft) and Standard Grass-Seed Label Rates.

Frequently Asked Questions

How much does one pallet of sod cover?

Roughly 450 square feet is a commonly cited standard, though it varies by supplier — usually somewhere between 400 and 500 square feet per pallet. Confirm your specific supplier's pallet size before ordering, since this calculator uses the 450 sq ft figure as a planning estimate.

How much grass seed do I need per square foot?

It depends heavily on the grass species and whether you're seeding bare soil (a new lawn, which typically needs a higher rate) or overseeding an existing lawn (typically a lower rate). Check your specific seed product's own label for its recommended rate per 1,000 sq ft, then enter it into this calculator's Grass Seed Rate field.

Should I use sod or grass seed?

Sod gives you an established-looking lawn almost immediately but costs more per square foot and needs careful, consistent watering while the roots knit into the soil below. Grass seed is cheaper and offers more species choice, but takes weeks to fully establish and needs frequent light watering until it germinates.