The AGI Calculator computes your Adjusted Gross Income (AGI) by summing your gross income sources (salary, interest, dividends, rental income, business income, capital gains, unemployment, pensions, and other taxable receipts) and then subtracting allowable above-the-line deductions (educator expenses, half of self-employment tax, retirement contributions, student loan interest, HSA contributions, health insurance for the self-employed, alimony paid where deductible, moving expenses when eligible, and similar adjustments). The tool is designed to help estimate AGI for budgeting, planning, or educational purposes and is not a replacement for tax preparation software or professional tax advice