Calculate the weighted average of interest rates in Microsoft Excel to compute the most accurate average interest rate among a group of lenders who received different rates.

Weighted averages are used often in investing, especially in how we measure the performance of our portfolios. Here's the WACC formula.

Generally, school systems that implement a weighted-funding formula say that it offers more transparency and fairness in funding than traditional school-funding systems.

VWAP is an indicator derived from price and volume that represents the average price of a security. It is used by traders to assess current values and price trends.

Here's the general formula for calculating weighted average cost of capital and why it's a useful metric for investors to understand.