This WebApp helps to compute investments to the base index funds.
In the book The Bogleheads' Guide to the Three-Fund Portfolio authors recommend investing in three main index funds.
We want funds that are diverse, uncorrelated, and have minimal possible fees.
Authors propose to use:
or similar.
They suggest the following numbers as a baseline:
You can use the above values or increase the bond component if you are risk-averse and decrease otherwise.