Grain Moisture Content Calculator

Drying 1000 kg of grain from 20 % to 12 % moisture (wet basis) removes 90.9091 kg of water.

Find:

Water to remove in drying (wet-basis moisture)Convert wet basis to dry basisConvert dry basis to wet basis

Initial mass of grain (kg):

Initial moisture, wet basis (%):

Final moisture, wet basis (%):

Water to be removed =

90.9090909090909 kg

Precision

Full answer, then cut to fewer decimals (not rounded):

90.9090909090909 kg
90.909090909090 kg
90.90909090909 kg
90.9090909090 kg
90.909090909 kg
90.90909090 kg
90.9090909 kg
90.909090 kg
90.90909 kg
90.9090 kg
90.909 kg
90.90 kg
90.9 kg

Final mass of grain: 909.0909091 kg
Bone-dry matter: 800 kg
Initial moisture, dry basis: 25 %
Final moisture, dry basis: 13.63636364 %

Step-by-step solution

Dry matter = 1000 × (1 − 0.2) = 800 kg
Final mass = dry matter ÷ (1 − 0.12) = 909.0909091 kg
Water removed = 1000 − 909.0909091 = 90.90909091 kg

Grain Moisture Content Formula

M_db = M_wb / (1 − M_wb)

final mass = initial mass × (1 − M_i)/(1 − M_f)

Worked Example

1000 kg of grain dried from 20 % to 12 % wet basis:

Dry matter = 1000 × (1 − 0.2) = 800 kg
Final mass = dry matter ÷ (1 − 0.12) = 909.0909091 kg
Water removed = 1000 − 909.0909091 = 90.90909091 kg

Bone-dry matter: 800 kg · Initial moisture, dry basis: 25 % · Final moisture, dry basis: 13.63636364 %

GATE tip

Always carry the bone-dry mass through the problem: it is the only quantity that does not change.

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Frequently asked questions

Why is the water removed not 8 % of 1000 kg?

Percentages refer to different total masses before and after drying; the dry matter stays constant, so work from it.

Which basis do drying rate equations use?

Dry basis, because the dry mass is constant during drying.

Sources

The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.

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APA

Scientific Converters. (2026, October 15). Grain Moisture Content Calculator. Retrieved October 29, 2026, from https://scientificconverters.com/calculators/moisture-content-calculator/

IEEE

Scientific Converters, "Grain Moisture Content Calculator," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/calculators/moisture-content-calculator/