How to Calculate P-Value Posted by Calculator Study March 31, 2025 How to Calculate P-Value: Interactive Calculator & Guide P-Value Calculator Calculate Clear P-Value Formula The standard formula for calculating p-value is: P = 2 × Φ(−|Z|) Where Φ is the cumulative distribution function of the standard normal distribution. Probability & Statistics Calculator Post navigation Previous Post P-Value CalculatorNext PostCalculate P-Value