{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"inflation"},"result":{"entity_type":"calculator","id":"inflation","calculator_id":"inflation","canonical_url":"https://tttkmbb.com/finance/inflation","name":"Inflation Calculator","title":"Inflation Calculator – Future Cost and Purchasing Power at a Constant Inflation Rate","category":"finance","category_name":"Finance","tool_name":"estimate_inflation_impact","featured_mcp_tool":false,"description":"Projects how an amount's cost rises and its purchasing power falls over a number of years at a constant annual inflation rate, using compound growth of the price level.","use_when":"You want to estimate what today's amount will cost in the future, or what a future sum is worth in today's money, from an assumed inflation rate.","do_not_use_when":"You need historical conversions between two calendar years (that requires a CPI table such as the BLS inflation calculator), or investment discounting (use present-value).","inputs":[{"name":"amount","label":"Amount","type":"number","required":true,"min":0,"max":1000000000000000,"description":"Amount in today's money.","example":1000},{"name":"annual_inflation_percent","label":"Annual inflation rate","type":"number","unit":"%","required":true,"min":-50,"max":200,"description":"Assumed constant yearly inflation in percent (negative for deflation). Many central banks target about 2 %.","example":3},{"name":"years","label":"Years","type":"number","unit":"years","required":true,"max":200,"exclusive_min":0,"description":"Number of years ahead.","example":10}],"outputs":[{"name":"future_cost","label":"Future cost of the same goods","type":"number","decimals":2,"description":"amount × (1 + inflation)^years: nominal money needed later to buy what amount buys today."},{"name":"purchasing_power","label":"Purchasing power of the amount","type":"number","decimals":2,"description":"amount / (1 + inflation)^years: what the same nominal amount will buy, in today's money."},{"name":"cumulative_inflation_percent","label":"Cumulative inflation","type":"number","unit":"%","decimals":2,"description":"((1 + inflation)^years − 1) × 100, total price-level rise."},{"name":"purchasing_power_loss_percent","label":"Purchasing-power loss","type":"number","unit":"%","decimals":2,"description":"(1 − 1 / (1 + inflation)^years) × 100."},{"name":"price_multiplier","label":"Price multiplier","type":"number","decimals":4,"description":"(1 + inflation)^years."}],"input_schema":{"type":"object","properties":{"amount":{"description":"Amount in today's money.","type":"number","minimum":0,"maximum":1000000000000000,"examples":[1000]},"annual_inflation_percent":{"description":"Assumed constant yearly inflation in percent (negative for deflation). 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Unit: %.","type":"number","x-unit":"%"},"price_multiplier":{"description":"(1 + inflation)^years.","type":"number"}}},"formula":"multiplier = (1 + annual_inflation_percent/100)^years; future_cost = amount × multiplier; purchasing_power = amount / multiplier; cumulative_inflation = (multiplier − 1) × 100","method":"Rate-based projection with a single constant rate compounded annually; it does not use actual CPI data and real inflation varies year to year and by basket of goods.","sources":[{"name":"U.S. Bureau of Labor Statistics – CPI Inflation Calculator (historical conversions)","url":"https://www.bls.gov/data/inflation_calculator.htm","type":"government","retrieved_at":"2026-09-23"},{"name":"Federal Reserve – Why does the Federal Reserve aim for inflation of 2 percent over the longer run?","url":"https://www.federalreserve.gov/faqs/economy_14400.htm","type":"government","retrieved_at":"2026-09-23"},{"name":"Wikipedia – Inflation","url":"https://en.wikipedia.org/wiki/Inflation","type":"reference","retrieved_at":"2026-09-23"}],"freshness":{"type":"static","max_age_seconds":null,"note":"Deterministic formula with fixed constants; results never go stale. Inputs supplied by the caller determine the output."},"examples":[{"name":"1,000 at 3 % for 10 years","inputs":{"amount":1000,"annual_inflation_percent":3,"years":10},"expected":{"future_cost":1343.92,"purchasing_power":744.09,"cumulative_inflation_percent":34.39,"purchasing_power_loss_percent":25.59,"price_multiplier":1.3439},"url":"https://tttkmbb.com/api/v1/calculate/inflation?amount=1000&annual_inflation_percent=3&years=10"},{"name":"50,000 at 2 % for 20 years","inputs":{"amount":50000,"annual_inflation_percent":2,"years":20},"expected":{"future_cost":74297.37,"purchasing_power":33648.57,"cumulative_inflation_percent":48.59},"url":"https://tttkmbb.com/api/v1/calculate/inflation?amount=50000&annual_inflation_percent=2&years=20"}],"faq":[{"q":"Which output do I want?","a":"future_cost answers 'how much will this cost in N years'; purchasing_power answers 'what will this nominal amount be worth in N years'. They are reciprocal projections of the same rate."},{"q":"Why is the purchasing-power loss smaller than the cumulative inflation?","a":"Because a 34.39 % rise in prices reduces what a fixed amount buys by 1 − 1/1.3439 = 25.59 %; the two measure the same change from opposite sides."}],"tags":["inflation calculator","purchasing power","future cost","cost of living","real value"],"related":[{"calculator_id":"present-value","reason":"Discount a future amount at an investment rate instead of inflation."},{"calculator_id":"cagr","reason":"Find the implied annual rate between two price levels."}],"links":{"html":"https://tttkmbb.com/finance/inflation","markdown":"https://tttkmbb.com/finance/inflation.md","json":"https://tttkmbb.com/finance/inflation.json","api":"https://tttkmbb.com/api/v1/calculate/inflation","schema":"https://tttkmbb.com/api/v1/calculators/inflation","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:25:42Z","next_actions":[{"tool":"run_calculator","calculator_id":"inflation","reason":"Run Inflation Calculator with the inputs above."}],"links":{"markdown":"https://tttkmbb.com/finance/inflation.md"}}