01
Lowest
$5.58
per gallon
83% below median
Roundup Quick Pro 1 box Makes 5 Gallons-1 Box
$27.90
5 gallons
Price as of Oct 12, 8:19 AM ET · Details
Cheapest weed killer per gallon
57 offers ranked · median $32.29 a gallon · checked Oct 12, 8:19 AM ET
Off: shows the same results Amazon returns, without extra filtering.
All words: keeps items whose title contains every word from your search, in any order.
Exact phrase: keeps items whose title includes your full search phrase exactly as typed.
Ranked results
PriceCrow compares available Amazon listings for weed killer, converts compatible package sizes to price per gallon, and sorts the results from lowest unit cost upward. This comparison uses current or recently cached Amazon data and may not include every listing, coupon, shipping charge, or Prime offer.
What is the lowest current price per gallon?
The lowest recorded result is $5.58 per gallon (83% below the median) — Roundup Quick Pro 1 box Makes 5 Gallons-1 Box
Price range: $5.58 – $8,058.44 per gallon across 57 offers. Median sits at $32.29.
Top brands showing: Spectracide Weed, Ortho Ground Clear, Ortho Weed Clear.
How fresh are these Amazon prices?
This result set was last recorded (about 17 hours ago). Rerun the search to check for newer prices.
How should I use this comparison?
Use it as a shortlist, then confirm the product size, price, shipping, coupon terms, availability, and Prime eligibility on Amazon. Add qualifiers such as “organic,” “bulk,” or a brand name when you need a narrower result set.
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02
$10.24
per gallon
68% below median
Spectracide Weed & Grass Killer for Driveways & Walkways, 1 Gal
$9.80
0.96 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
03
$10.24
per gallon
68% below median
Spectracide Weed & Grass Killer for Driveways & Walkways, 1.33 Gal
$12.67
1.24 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
04
$11.52
per gallon
64% below median
Spectracide Weed Stop for Lawns Plus Crabgrass Killer, Ready-to-Use, 1 Gal
$10.96
0.95 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
05
$14.08
per gallon
56% below median
Ortho WeedClear Weed Killer for Lawns with Comfort Wand, 1 gal.
$14.64
1.04 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
06
$14.08
per gallon
56% below median
Spectracide Weed & Grass Killer with AccuShot Power Sprayer, 1.33 Gal
$18.46
1.31 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
07
$15.36
per gallon
52% below median
Ortho WeedClear Lawn Weed Killer Ready-to-Use with Comfort Wand, 1.33 gal.
$20.30
1.32 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
08
$19.20
per gallon
41% below median
Roundup for Lawns1 Refill for Extend Wand, 1.25 gal.
$23.99
1.25 gallons
Price as of Oct 12, 8:19 AM ET · Details
09
$20.48
per gallon
37% below median
Roundup Dual Action Weed & Grass Killer Plus 4 Month Preventer, 1.33 gal.
$27.99
1.37 gallons
Prime
Price as of Oct 12, 8:19 AM ET · Details
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