How much minimum do I have to withdraw from IRA after age 70.5 years?

The Required Minimum Distribution (RMD) from an IRA starting at age 70.5 is calculated based on your life expectancy and the balance in your account. The specific amount you must withdraw each year is calculated using IRS tables, with penalties for failing to take the correct distribution. It's best to consult with a financial advisor or tax professional to determine your exact RMD amount.