Question: how to calculate yearly interest rate from monthly?
Answer: To convert an annual interest rate to monthly, use the formula "i" divided by "n," or interest divided by payment periods. For example, to determine the monthly rate on a $1,200 loan with one year of payments and a 10 percent APR, divide by 12, or 10 ÷ 12, to arrive at 0.0083 percent as the monthly rate.