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Inflation calculator by country and year documentation
Inputs, formulas, assumptions and API/MCP examples for the inflation calculator by country and year. Reproduce a calculation and cite its sources.
Content updated . Assumptions reviewed .
Formula and assumptions
Equivalent value = amount × CPI(end year) ÷ CPI(start year).
- Annual average national CPI measures a broad basket, not your personal cost of living.
- Missing years are unavailable; values are never interpolated. Earlier-year comparisons work in reverse.
- Amounts stay in the country’s domestic monetary unit; redenominations and changes in currency units need separate handling.
Assumptions reviewed:
Sources
- World Bank, World Development Indicators; IMF International Financial Statistics. CC BY 4.0; https://creativecommons.org/licenses/by/4.0/; vintage 2026-07-13.
Parameters
| Name | Description | Type | Default | Minimum | Maximum |
|---|---|---|---|---|---|
| amount | Amount | number | 1000 | 0 | 1,000,000,000,000 |
| country | World Bank ISO alpha-3 country code. Available observation years vary by country. | string | "USA" | ||
| startYear | From year | integer | 2000 | 1,960 | 2,025 |
| endYear | To year | integer | 2024 | 1,960 | 2,025 |
JSON API
GET accepts one input parameter containing URL-encoded JSON. POST sends the JSON input object. Prefer POST for personal figures. Inputs are limited to 16 KiB. POST results are not stored; GET results may be cached for up to 24 hours.
curl -X POST https://klarfort.com/tools/api/v1/inflation-calculator -H "Content-Type: application/json" --data '{"amount":1000,"country":"USA","startYear":2000,"endYear":2024}'fetch("https://klarfort.com/tools/api/v1/inflation-calculator", {method:"POST", headers:{"Content-Type":"application/json"}, body:JSON.stringify({"amount":1000,"country":"USA","startYear":2000,"endYear":2024})})import json, urllib.request
request = urllib.request.Request("https://klarfort.com/tools/api/v1/inflation-calculator", data=json.dumps({"amount":1000,"country":"USA","startYear":2000,"endYear":2024}).encode(), headers={"Content-Type":"application/json"})
print(urllib.request.urlopen(request).read().decode())Connected assistants
Connect using https://klarfort.com/tools/mcp. Discover this calculator with tools/list, then call inflation-calculator. Protocol versions 2026-07-28 and 2025-11-25 are supported. Modern requests carry protocol metadata and matching HTTP headers. Set Mcp-Name to params.name for tools/call and to params.uri for resources/read. Older clients initialize first.
Limits: 120 requests per minute per address and approximately 3,000 per minute per edge location. Simulations are capped at 1,000 paths, 600 months and 150,000 path-months (paths multiplied by months). Shorten the duration or reduce paths when that work limit is exceeded. A limit response returns 429 and Retry-After. No exact remaining-request count is available.
Usage and credit
Free for personal, commercial and any other lawful use with credit to KlarFort at https://klarfort.com/. Third-party data terms still apply.
Place a visible credit near the reused material or in the credits for your work or integration. One clear credit per work or integration is sufficient; no separate credit per API request is required. Links to individual calculators are optional.
Computed with KlarFort Calculators, https://klarfort.com/
The API returns this text in credit and the homepage in credit_url. The optional citation_url identifies the calculator for reference. See usage and credit for the full permission.
KlarFort is not financial, investment, tax, or legal advice. Verify outputs before making material decisions.