What is the difference between sales forecast and budgeted sales?

Sales forecast ; calculated from historical information , we can use last month or last three months to show you the expected growth rate to indicate the future 

Sales Budget ; come from management with a view increasing profits and encourage increasing the sales revenues 

Budget is:

The financial expression of your target.

This is the course you have actively decided upon and set for yourself; it is your intention.

It is where you want to go.

It is normally prepared just once for each financial year  

Forecast *:

This is your latest expectation of what really will happen over the next few months, based on what is happening in your business now.

It is where you are going.

It is your financial radar.

Is most useful if prepared every month.

Sales forecats: are estimates of your sales for the forecast period

Budgeted sales: Expected sales for the budget period