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Line 1 - Federal Debt: Total Public Debt as Percent of Gross Domestic Product
Line 1
(a) Federal Debt: Total Public Debt as Percent of Gross Domestic Product, Percent of GDP, Seasonally Adjusted (GFDEGDQ188S)
Federal Debt: Total Public Debt as Percent of Gross Domestic Product (GFDEGDQ188S) (https://fred.stlouisfed.org/series/GFDEGDQ188S) was first constructed by the Federal Reserve Bank of St. Louis in October 2012. It is calculated using Federal Government Debt: Total Public Debt (GFDEBTN) (https://fred.stlouisfed.org/series/GFDEBTN) and Gross Domestic Product, 1 Decimal (GDP) (https://fred.stlouisfed.org/series/GDP): GFDEGDQ188S = ((GFDEBTN/1000)/GDP)*100 GFDEBTN/1000 transforms GFDEBTN from millions of dollars to billions of dollars.

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Write a custom formula to transform one or more series or combine two or more series.

You can begin by adding a series to combine with your existing series.

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    Now create a custom formula to combine or transform the series.

    For example, invert an exchange rate by using formula 1/a, where “a” refers to the first FRED data series added to this line. Or calculate the spread between 2 interest rates, a and b, by using the formula a - b.

    Use the assigned data series variables (a, b, c, etc.) together with operators (+, -, *, /, ^, etc.), parentheses and constants (1, 1.5, 2, etc.) to create your own formula (e.g., 1/a, a-b, (a+b)/2, (a/(a+b+c))*100). As noted above, you may add other data series to this line before entering a formula.

    Finally, you can change the units of your new series.

    Select a date that will equal 100 for your custom index:
        Enter date as YYYY-MM-DD

    Line 1 - Federal Debt: Total Public Debt as Percent of Gross Domestic Product
    Line 2
    (a) Federal Outlays: Interest as Percent of Gross Domestic Product, Percent of GDP, Not Seasonally Adjusted (FYOIGDA188S)
    Federal Outlays: Interest as Percent of Gross Domestic Product (FYOIGDA188S) (https://fred.stlouisfed.org/series/FYOIGDA188S) was first constructed by the Federal Reserve Bank of St. Louis in January 2013. It is calculated using Federal Outlays: Interest (FYOINT) (https://fred.stlouisfed.org/series/FYOINT) and Gross Domestic Product (GDPA) (https://fred.stlouisfed.org/series/GDPA): FYOIGDA188S = ((FYOINT/1000)/GDPA)*100 FYOINT/1000 transforms FYOINT from millions of dollars to billions of dollars.

    Select a date that will equal 100 for your custom index:
      Enter date as YYYY-MM-DD
    to

    Write a custom formula to transform one or more series or combine two or more series.

    You can begin by adding a series to combine with your existing series.

    Type keywords to search for data

      Now create a custom formula to combine or transform the series.

      For example, invert an exchange rate by using formula 1/a, where “a” refers to the first FRED data series added to this line. Or calculate the spread between 2 interest rates, a and b, by using the formula a - b.

      Use the assigned data series variables (a, b, c, etc.) together with operators (+, -, *, /, ^, etc.), parentheses and constants (1, 1.5, 2, etc.) to create your own formula (e.g., 1/a, a-b, (a+b)/2, (a/(a+b+c))*100). As noted above, you may add other data series to this line before entering a formula.

      Finally, you can change the units of your new series.

      Select a date that will equal 100 for your custom index:
          Enter date as YYYY-MM-DD

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      Line 1
      Federal Debt: Total Public Debt as Percent of Gross Domestic Product
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      Line 2
      Federal Outlays: Interest as Percent of Gross Domestic Product
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      Notes

      Federal Debt: Total Public Debt as Percent of Gross Domestic Product  (GFDEGDQ188S)

      Source: U.S. Office of Management and Budget  

      Source: Federal Reserve Bank of St. Louis  

      Release: Debt to Gross Domestic Product Ratios

      Units:  Percent of GDP, Seasonally Adjusted

      Frequency:  Quarterly

      Notes:

      Federal Debt: Total Public Debt as Percent of Gross Domestic Product (GFDEGDQ188S) was first constructed by the Federal Reserve Bank of St. Louis in October 2012. It is calculated using Federal Government Debt: Total Public Debt (GFDEBTN) and Gross Domestic Product, 1 Decimal (GDP):
      GFDEGDQ188S = ((GFDEBTN/1000)/GDP)*100
      GFDEBTN/1000 transforms GFDEBTN from millions of dollars to billions of dollars.

      Suggested Citation:

      U.S. Office of Management and Budget and Federal Reserve Bank of St. Louis, Federal Debt: Total Public Debt as Percent of Gross Domestic Product [GFDEGDQ188S], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/GFDEGDQ188S, April 3, 2025.

      Federal Outlays: Interest as Percent of Gross Domestic Product  (FYOIGDA188S)

      Source: U.S. Office of Management and Budget  

      Source: Federal Reserve Bank of St. Louis  

      Release: Debt to Gross Domestic Product Ratios

      Units:  Percent of GDP, Not Seasonally Adjusted

      Frequency:  Annual

      Notes:

      Federal Outlays: Interest as Percent of Gross Domestic Product (FYOIGDA188S) was first constructed by the Federal Reserve Bank of St. Louis in January 2013. It is calculated using Federal Outlays: Interest (FYOINT) and Gross Domestic Product (GDPA):
      FYOIGDA188S = ((FYOINT/1000)/GDPA)*100
      FYOINT/1000 transforms FYOINT from millions of dollars to billions of dollars.

      Suggested Citation:

      U.S. Office of Management and Budget and Federal Reserve Bank of St. Louis, Federal Outlays: Interest as Percent of Gross Domestic Product [FYOIGDA188S], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/FYOIGDA188S, April 3, 2025.

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      U.S. Treasury: Financial Management Service Office of Management and Budget Public Debt Federal St. Louis Fed Bureau of Economic Analysis Gross Domestic Product Quarterly Seasonally Adjusted Nation Public Domain: Citation Requested United States of America Outlays Percent Interest Annual Not Seasonally Adjusted

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