Calculator

Category: Soil Moisture and Hydrology

  • Soil Moisture Content Calculator (Gravimetric Method)

    Soil Moisture Content Calculator
    (Gravimetric Method)

    Formula:
    Soil Moisture Content (%) =
    [(Moist weight − Dry weight) / Dry weight] × 100

  • Soil Moisture Content Calculator (Volumetric Method)

    Soil Moisture Content Calculator
    (Volumetric Method)

    Formula:
    Volumetric Moisture (%) =
    Gravimetric Moisture (%) × Bulk Density

  • Field Capacity Estimation

    Field Capacity Estimation
    (Volumetric Basis)

    Formula:
    Field Capacity (%) =
    Gravimetric Moisture (%) × Bulk Density

  • Permanent Wilting Point Calculator

    Permanent Wilting Point Calculator
    (Volumetric Basis)

    Formula:
    Permanent Wilting Point (%) =
    Gravimetric Moisture (%) × Bulk Density

  • Available Water Capacity Calculator

    Available Water Capacity Calculator
    (Volumetric Basis)

    Formula:
    Available Water Capacity (%) =
    Field Capacity (%) − Permanent Wilting Point (%)

  • Soil Water Deficit Calculator

    Soil Water Deficit Calculator

    Definition:
    Soil water deficit is the difference between field capacity and the existing soil moisture content, indicating the amount of water required to bring the soil back to field capacity.
    Formula:
    Soil Water Deficit (%) =
    Field Capacity (%) − Current Soil Moisture (%)

  • Soil Bulk Density Calculator

    Soil Bulk Density Calculator

    Definition:
    Soil bulk density is the mass of oven-dry soil per unit volume of soil, including the pore spaces. It is an indicator of soil compaction and root penetration.
    Formula:
    Bulk Density (g/cm³) =
    Oven-dry soil weight (g) ÷ Soil volume (cm³)

  • Soil Porosity Calculator

    Soil Porosity Calculator

    Definition:
    Soil porosity is the percentage of the total soil volume that is occupied by pore spaces (air and water). It indicates the soil’s ability to store water and allow air movement.
    Formula:
    Soil Porosity (%) =
    [1 − (Bulk Density ÷ Particle Density)] × 100

  • Infiltration Rate Calculator

    Infiltration Rate Calculator

    Definition:
    Infiltration rate is the speed at which water enters the soil surface. It is expressed as the depth of water infiltrated per unit time and reflects soil texture, structure, and surface condition.
    Formula:
    Infiltration Rate (mm/hr) =
    Depth of water infiltrated (mm) ÷ Time (hr)

  • Percolation Loss Calculator

    Percolation Loss Calculator

    Definition:
    Percolation loss is the downward movement of water below the root zone after infiltration, making it unavailable for plant uptake. It is a major component of water loss in light-textured and flooded soils.
    Formula:
    Percolation Loss (mm/hr) =
    Infiltration Rate − Root Zone Holding Capacity