The formula to calculate the Emergency Fund Ratio (EFR) is:
\[ EFR = \frac{EF}{ME} \]
Where:
Let's say the total emergency fund amount (EF) is $10,000 and the total monthly expenses (ME) are $2,000. Using the formula:
\[ EFR = \frac{10000}{2000} \]
We get:
\[ EFR = 5 \]
So, the emergency fund ratio is 5, meaning your emergency fund can cover 5 months of expenses.