Soil Moisture Calculator
Calculate gravimetric soil moisture percentage using wet and dry soil weights.
Inputs
How It Works
Soil Moisture (%) =
[(Wet Weight − Dry Weight) ÷ Dry Weight] × 100
This measures the percentage of water relative to dry soil mass.
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FAQ
What is gravimetric soil moisture?
It is the ratio of water weight to dry soil weight, expressed as a percentage.
How is dry soil weight determined?
Dry soil weight is measured after oven-drying the sample at 105°C until constant weight.
Why measure soil moisture?
Monitoring soil moisture helps optimize irrigation timing, prevent water stress, and improve crop performance.
Understanding Soil Moisture
Soil moisture is critical for crop growth, nutrient uptake, and irrigation management. Too little moisture causes plant stress, while excess moisture reduces oxygen availability to roots.
Gravimetric soil moisture is a laboratory-based measurement method that provides highly accurate moisture content values.
Understanding soil moisture levels helps producers make informed irrigation and soil management decisions.