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Wet-Basis Moisture, Dry Mass & Water Mass

Calculate water mass and wet-basis moisture percentage from wet and dried sample masses, including zero moisture.

Calculator inputs

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Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

A 10 kg wet sample with 8 kg dry mass contains 2 kg water and 20% wet-basis moisture.

Water mass = wet mass − dry mass; moisture (%) = 100 × water mass / wet mass

Enter these known values and leave the other values blank.

This is wet-basis moisture: water mass divided by total wet mass. Dry-basis moisture uses a different denominator and may exceed 100%.
Wet mass must be positive. Dry mass may be zero but cannot exceed wet mass; moisture is bounded from 0% to 100%.
Use mass measurements from the same sample and a suitable drying method. This arithmetic does not identify which lost material was water.

This is wet-basis moisture: water mass divided by total wet mass. Dry-basis moisture uses a different denominator and may exceed 100%.

Bookify accepts zero dry mass and bounds wet-basis moisture at 100%.