Real (inflation-adjusted) return API

Compute the inflation-adjusted return with the exact Fisher equation realReturn = (1+nominal)/(1+inflation) − 1, alongside the common nominal−inflation approximation and a rating bucket — correcting the frequent LLM mistake of just subtracting. Answers 'what is my real return after inflation','Fisher equation real rate','is my return beating inflation'.

Price$0.01per request

MethodPOST

Route/v1/calc/pf-real-return

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcreal-returnfisher-equationinflationinvestingreturnspersonal-financenominal

API URLhttps://x402.hexl.dev/v1/calc/pf-real-return

Integration docs

Example request

{
  "nominalReturnPercent": 8,
  "inflationPercent": 3
}

Example response

{
  "formula": "realReturn = (1+nominal)/(1+inflation) − 1  (Fisher equation)",
  "realReturnPercent": 4.854,
  "approximateRealReturnPercent": 5,
  "rating": "strong",
  "breakdown": {
    "nominalReturnPercent": 8,
    "inflationPercent": 3
  }
}

Input schema

{
  "type": "object",
  "required": [
    "nominalReturnPercent",
    "inflationPercent"
  ],
  "properties": {
    "nominalReturnPercent": {
      "type": "number",
      "examples": [
        8
      ]
    },
    "inflationPercent": {
      "type": "number",
      "examples": [
        3
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}