The pKa Calculator is a powerful chemistry tool that helps determine the acid dissociation constant (Ka) or its logarithmic form, pKa. By entering either Ka or pKa, this calculator instantly converts between the two values using the relationship pKa = −log₁₀(Ka). It’s an essential tool for students, teachers, and laboratory chemists who want to understand the strength of acids and bases in solution. A lower pKa value indicates a stronger acid, while a higher pKa suggests a weaker acid. Use this simple and accurate calculator to explore acid-base equilibria, buffer solutions, and the relationship between Ka, pKa, and pH in chemistry.