The standard ROUND function allows you to round to a particular decimal point. Roundn is a function I use all the time that allows you to round to any number. Below is the code:
Public Function roundn(Number As Double, RoundTo As Double) As Double
roundn = Round(Number / RoundTo, 0) * RoundTo
End Function
In Excel, this function could be used to calculate the following:
=roundn(123456,500) = 123,500
=roundn(1234.5678,.0005) = 1,234.55
=roundn(1000/3,0.25) = 333.25