Lime Calculator

How much lime does my lawn need?

ft
ft
pH
Soil texture
lb

Order this much lime

90pounds

Typical calcitic lime rate to reach pH 6.5 in a 6 in root zone. Use your soil test if you have one, and follow the product label.

4.55.05.56.06.57.07.5Now 5.5, goal 6.550 × 30 ft lawn3 bags of 40 lb
Rate60 lb per 1,000 sq ft
40 lb bags3
Applications2, at most 50 lb per 1,000 sq ft each
Lawn area1,500 sq ft

Lime need depends on your soil type and how far your pH sits below target. Enter your soil test pH to see pounds, bags and how many applications to split it into.

How it works

Rates come from a University of Kentucky table for raising a 6 inch root zone to pH 6.5, scaled by soil texture and current pH, then multiplied by lawn area.

Before you order

  • Test before you lime. A lab report with buffer pH beats any chart.
  • Keep each surface pass to about 50 lb per 1,000 sq ft and retest before reapplying.
  • Apply with a drop or broadcast spreader in two directions to avoid stripes.

Common questions

When should I lime my lawn?

Fall is a common choice because winter freezing and thawing helps work lime into the soil, but any time you can get it down works.

Why does clay need more lime than sand?

Clay holds more reserve acidity, so it takes more lime to shift the pH.