To calculate alimony in Virginia, consider factors such as the length of the marriage, the financial needs of the receiving spouse, and the paying spouse's ability to pay. Courts also evaluate the standard of living during the marriage, ages and health of both spouses, and any child custody arrangements. While there is no set formula, understanding these elements can help in estimating potential alimony amounts. Consulting a family law attorney can provide personalized guidance and insights into your specific situation.