🌱 Volumetric to gravimetric moisture, saturation percent, and related soil units—free and instant. For irrigation, agronomy, geoscience, and environmental monitoring. No sign-up required.
Scientific and technical measurements
Soil moisture describes how much water is held in the soil. Farmers, hydrologists, and environmental scientists measure it in different ways; this page helps you translate between those measurements.
Volumetric water content answers: "What fraction of a chunk of soil is water by volume?" Think of it as how full the soil pores are with water, expressed per unit volume of soil. Field sensors and irrigation models often use this view.
Gravimetric moisture answers: "How much water mass compared to the mass of dry soil?" Labs often dry a soil sample and weigh it before and after to get this ratio—useful when you care about mass balance or chemistry.
Saturation compares current moisture to the maximum the soil could hold when all pores are full of water. It is useful for knowing how close soil is to being waterlogged or how much room is left to absorb rain.
The converter and the technical section below use standard symbols (for example volumetric and gravimetric ratios) so you can match textbooks and data sheets after you read the ideas here.
Convert between different soil moisture measurement methods for crop irrigation planning and soil health assessment.
Analyze soil moisture data for hydrological studies, climate research, and environmental monitoring applications.
Convert between laboratory and field measurements for comprehensive soil moisture analysis and research.
Volume of water per unit volume of soil, most commonly used in field measurements.
Mass of water per unit mass of dry soil, commonly used in laboratory analysis.
Degree of saturation and depth-based water measurements for practical applications.
Understanding the relationships between different soil moisture measurement methods is crucial for accurate soil analysis and agricultural planning.
Soil moisture measurements are fundamental to understanding soil-water relationships and optimizing agricultural practices.