Moving average calculator
Paste a time-ordered series, choose a method and compare the raw values with the smoothed line.
Data and smoothed series
The smoothed line describes the observed series; it is not a forecast on its own.
Step-by-step calculation
| Period | Value | Average | Difference |
|---|---|---|---|
| Fill in the fields above — the result is computed on this page. | |||
How do I use this page?
- Paste values in time order.
- Choose SMA, WMA, EMA or CMA and set the method parameter.
- Compare the chart and the row-by-row table.
What this page does not do: A moving average describes the supplied data. It does not prove a trend or automatically model seasonality and structural changes.
Further reading
Theory — what is a moving average?
A moving average smooths a time series by computing the average over successive data windows instead of the whole series at once. SMA weighs every observation in the window equally, WMA lets you set weights manually, and EMA favors recent values via a coefficient α. CMA averages all observations from the start of the series. The calculator compares raw data with the smoothed line; a shorter window reacts faster, a longer one smooths more.
Frequently asked questions
How should I choose an SMA window?
What does α mean in EMA?
See also
A/B test calculator
Compare two proportions in an A/B test. Calculate conversion rates, difference, uplift, z score, p value and c
A/B test planning — sample size, MDE and duration
Plan a two-proportion experiment, estimate detectable effect and traffic duration.
ACF and PACF autocorrelation calculator
Calculate ACF and PACF across time-series lags. Review the chart, reference bounds and coefficient table.