The Standard Error Calculator estimates the variability of a sample mean in relation to the true population mean. It is computed by dividing the sample standard deviation by the square root of the sample size, expressed as SE=snSE = \frac{s}{\sqrt{n}}SE=n​s​. A smaller standard error indicates that the sample mean is a more accurate reflection of the population mean, while a larger one suggests greater sampling variability. This calculator is useful in statistical analysis for understanding the precision of sample estimates and constructing confidence intervals.