Demand forecasting, seasonal index, and forecast accuracy calculators. Browse our free demand tools below — all calculators are instant, accurate, and require no sign-up.
Exponential Smoothing Forecast Calculator — Calculate demand forecasts using simple exponential smoothing. Apply a smoothing constant (alpha) to weight recent demand more heavily.
Forecast Bias & Tracking Signal Calculator — Calculate forecast bias and tracking signal to detect systematic over- or under-forecasting. Identify directional errors in your demand forecast.
MAPE Calculator (Mean Absolute Percentage Error) — Calculate Mean Absolute Percentage Error to measure forecast accuracy. Express average deviation between actual and forecast as a percentage.
MAD Calculator (Mean Absolute Deviation) — Calculate Mean Absolute Deviation to measure forecast accuracy in units. Determine the average absolute difference between actual and forecast demand.
MSE Calculator (Mean Squared Error) — Calculate Mean Squared Error to measure forecast accuracy. Penalize large forecast deviations more heavily by squaring each period's error.
Moving Average Forecast Calculator — Calculate a simple moving average demand forecast by averaging the last N periods. Smooth out noise and project the next period's demand.
Weighted Moving Average Calculator — Calculate demand forecasts using a weighted moving average. Assign custom weights to recent periods for more responsive demand projections.
Seasonal Index Calculator — Calculate seasonal indices to adjust demand forecasts for seasonal patterns. Compute seasonal factors and deseasonalized base demand for any period.
XYZ Analysis Calculator — Classify inventory items by demand variability using coefficient of variation. X is stable, Y is moderate, Z is highly variable.