Zovo Inflation Calculator

Use this when the user asks a us inflation calculator question, for example what is $100 worth today, the value of money over time, or a dollar inflation calculator, buying power calculator or consumer price index calculator request for US dollars. It converts one US dollar amount between two periods with the published CPI-U index and returns the adjusted amount, both index values, the cumulative inflation, the average annual rate, and the buying-power change. It works for published periods from 1913-01 to the latest bundled month, year or YYYY-MM inputs, and amounts greater than zero up to one trillion dollars including fractional cents; only the output is rounded to cents. Do not use for other countries, for regional or core CPI, for forecasts, or for financial advice.

{
  "type": "object",
  "properties": {
    "amount": {
      "type": "number",
      "exclusiveMinimum": 0,
      "maximum": 1000000000000,
      "description": "The amount of US dollars to adjust, e.g. 100, 1234.56 or 1.005. Greater than zero and no more than 1,000,000,000,000; fractional cents are accepted and only the result is rounded to cents."
    },
    "from": {
      "type": "string",
      "minLength": 4,
      "maxLength": 7,
      "description": "The from period as a year such as 1990, or a year and month such as 1990-06. 1913-01 or later and not after the latest published month."
    },
    "to": {
      "type": "string",
      "minLength": 4,
      "maxLength": 7,
      "description": "The to period as a year such as 1990, or a year and month such as 1990-06. 1913-01 or later and not after the latest published month."
    }
  },
  "required": [
    "amount",
    "from",
    "to"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "kind": {
      "type": "string",
      "const": "adjust"
    },
    "amount": {
      "type": "number"
    },
    "from": {
      "type": "string"
    },
    "to": {
      "type": "string"
    },
    "adjusted_amount": {
      "type": "number"
    },
    "adjusted_amount_text": {
      "type": "string"
    },
    "cpi_from": {
      "type": "number"
    },
    "cpi_to": {
      "type": "number"
    },
    "cpi_from_text": {
      "type": "string"
    },
    "cpi_to_text": {
      "type": "string"
    },
    "cpi_from_period": {
      "type": "string"
    },
    "cpi_to_period": {
      "type": "string"
    },
    "cumulative_pct": {
      "type": "number"
    },
    "average_annual_pct": {
      "type": [
        "number",
        "null"
      ]
    },
    "years": {
      "type": "number"
    },
    "buying_power_change_pct": {
      "type": "number"
    },
    "latest_month": {
      "type": "string"
    },
    "source": {
      "type": "string"
    }
  },
  "required": [
    "kind",
    "amount",
    "from",
    "to",
    "adjusted_amount",
    "adjusted_amount_text",
    "cpi_from",
    "cpi_to",
    "cpi_from_text",
    "cpi_to_text",
    "cpi_from_period",
    "cpi_to_period",
    "cumulative_pct",
    "average_annual_pct",
    "years",
    "buying_power_change_pct",
    "latest_month",
    "source"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": false
}

Use this when the user wants a consumer price index calculator, inflation rate calculator or cpi calculator across many years: a year-by-year table of the annual average CPI-U and the yearly inflation rate, with a CSV download. It uses the bundled published CPI-U series for 1913 through the latest full year, up to 120 years per call. Do not use for a single amount conversion (use adjust_for_inflation), for other countries, for monthly percent changes, or for forecasts.

{
  "type": "object",
  "properties": {
    "start_year": {
      "type": "integer",
      "minimum": 1913,
      "maximum": 2200,
      "description": "The first year of the table, e.g. 1990. 1913 or later."
    },
    "end_year": {
      "type": "integer",
      "minimum": 1913,
      "maximum": 2200,
      "description": "The last year of the table, e.g. 2024. At most 120 years after the start year and not after the latest full year."
    }
  },
  "required": [
    "start_year",
    "end_year"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "kind": {
      "type": "string",
      "const": "table"
    },
    "start_year": {
      "type": "number"
    },
    "end_year": {
      "type": "number"
    },
    "years_count": {
      "type": "number"
    },
    "rows": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "year": {
            "type": "number"
          },
          "average_cpi": {
            "type": "number"
          },
          "yoy_pct": {
            "type": [
              "number",
              "null"
            ]
          }
        },
        "required": [
          "year",
          "average_cpi",
          "yoy_pct"
        ],
        "additionalProperties": false
      }
    },
    "rows_shown": {
      "type": "number"
    },
    "latest_year": {
      "type": "number"
    },
    "latest_month": {
      "type": "string"
    },
    "source": {
      "type": "string"
    },
    "downloads": {
      "type": "object",
      "properties": {
        "csv": {
          "type": "string"
        }
      },
      "required": [
        "csv"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "kind",
    "start_year",
    "end_year",
    "years_count",
    "rows",
    "rows_shown",
    "latest_year",
    "latest_month",
    "source",
    "downloads"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": false
}