Estimate how much lime or sulfur may be needed to adjust soil pH for gardens, raised beds, lawns, flower beds, and planting areas. Calculate pH change, amendment amount, pounds needed, bags needed, cost, and application rate.
Auto mode:
The calculator chooses lime when target pH is higher than current pH and sulfur when target pH is lower than current pH.
Lime mode:
The calculator estimates lime needed to raise pH based on area, pH change, soil texture, mixing depth, and lime strength.
Sulfur mode:
The calculator estimates sulfur needed to lower pH based on area, pH change, soil texture, mixing depth, and sulfur strength.
Known rate mode:
The calculator uses your selected application rate to estimate total amendment, bags, and cost.
A soil pH calculator helps estimate how much lime or sulfur may be needed before buying and applying soil amendments.
It can help compare application rates, estimate costs, plan split applications, avoid over-application, and adjust garden soil gradually based on a soil test.
Your result shows amendment type, pH change, pounds needed, ounces needed, bags needed, rate per 100 square feet, rate per 1,000 square feet, amount per split application, and estimated cost.
Garden lime is commonly used to raise acidic soil pH. The amount depends on soil test results, soil texture, area, mixing depth, and product strength.
Elemental sulfur is commonly used to lower alkaline soil pH. The change can take time and depends on soil biology, temperature, moisture, and soil texture.
Many vegetable gardens perform well around slightly acidic to neutral soil, often near the 6.0 to 7.0 range, but crop needs vary.
For larger pH changes, split applications are often safer than applying everything at once. Retest soil before making additional adjustments.
No. This is an estimate. Soil pH adjustment depends on lab soil test recommendations, buffering capacity, soil texture, organic matter, product strength, moisture, temperature, and local growing conditions.