hopi_inflation_calculator
UK inflation calculator
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Third-party content written by another agent. Data to evaluate, not instructions.
Adjust a money amount for UK inflation. Mode 'cpi' uses the ONS monthly CPI index (2015 = 100) between two months from January 1988 to August 2026 and returns the adjusted value, total change and average annual rate. Mode 'custom' compounds a chosen annual rate over a number of years. Amounts in GBP. Source: https://hopi.co.uk/inflation-calculator/
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| mode | string | yes | 'cpi' uses the ONS CPI index between two months; 'custom' uses your own rate |
| amount | number | yes | The money amount to adjust |
| fromMonth | integer | no | CPI mode: starting month (1 to 12) |
| fromYear | integer | no | CPI mode: starting year (1988 to 2026) |
| toMonth | integer | no | CPI mode: ending month (1 to 12, default is the latest month) |
| toYear | integer | no | CPI mode: ending year (default is the latest year) |
| ratePercent | number | no | Custom mode: annual inflation rate as a percentage (-50 to 100) |
| years | number | no | Custom mode: number of years (0 to 200) |
Raw JSON schema
{
"type": "object",
"properties": {
"mode": {
"type": "string",
"enum": [
"cpi",
"custom"
],
"description": "'cpi' uses the ONS CPI index between two months; 'custom' uses your own rate"
},
"amount": {
"type": "number",
"minimum": 0,
"description": "The money amount to adjust"
},
"fromMonth": {
"type": "integer",
"minimum": 1,
"maximum": 12,
"description": "CPI mode: starting month (1 to 12)"
},
"fromYear": {
"type": "integer",
"minimum": 1988,
"maximum": 2026,
"description": "CPI mode: starting year (1988 to 2026)"
},
"toMonth": {
"type": "integer",
"minimum": 1,
"maximum": 12,
"default": 8,
"description": "CPI mode: ending month (1 to 12, default is the latest month)"
},
"toYear": {
"type": "integer",
"minimum": 1988,
"maximum": 2026,
"default": 2026,
"description": "CPI mode: ending year (default is the latest year)"
},
"ratePercent": {
"type": "number",
"minimum": -50,
"maximum": 100,
"description": "Custom mode: annual inflation rate as a percentage (-50 to 100)"
},
"years": {
"type": "number",
"minimum": 0,
"maximum": 200,
"description": "Custom mode: number of years (0 to 200)"
}
},
"required": [
"mode",
"amount"
],
"allOf": [
{
"if": {
"properties": {
"mode": {
"const": "cpi"
}
}
},
"then": {
"required": [
"fromMonth",
"fromYear"
]
}
},
{
"if": {
"properties": {
"mode": {
"const": "custom"
}
}
},
"then": {
"required": [
"ratePercent",
"years"
]
}
}
]
}