Science & Environment
Soil Cation Exchange Capacity Calculator
Calculate soil cation exchange capacity (CEC) from exchangeable base cations.
Your inputs
Change any value to update the result instantly.
Cation exchange capacity
11.7 cmolc/kg
Base saturation
91.5 %
Sum of base cations
10.7 cmolc/kg
Exchangeable acidity
1 cmolc/kg
Formula and working
CEC (cmolc/kg) = Ca + Mg + K + Na + Al + H (all in cmolc/kg)
- 1
Collect the inputs
Calcium (Ca²⁺) = 8 cmolc/kg; Magnesium (Mg²⁺) = 2 cmolc/kg; Potassium (K⁺) = 0.5 cmolc/kg; Sodium (Na⁺) = 0.2 cmolc/kg; Exchangeable acidity (Al+H) = 1 cmolc/kg
- 2
Apply the formula
CEC (cmolc/kg) = Ca + Mg + K + Na + Al + H (all in cmolc/kg)
- 3
Result
Cation exchange capacity = 11.7 cmolc/kg
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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