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Tools.Town
290+ free online tools

Age Calculator API

Calculate your exact age in years, months, and days from any birth date — plus next birthday countdown.

Category: Date & Time Endpoint: /v1/date/age Method: GET Auth: API Key

Fast & Accurate

Get precise results instantly.

Easy Integration

Simple REST API with JSON response.

Developer Friendly

Clear docs and SDK examples.

Free to Start

1,000 free requests/month.

Endpoint

All requests should be made to the following endpoint:

GEThttps://api.tools.town/v1/date/age

Authentication

This endpoint requires an API Key. Include your API key in the request header.

Authorization: Bearer YOUR_API_KEY
You can get your API key from your dashboard.

Request Parameters

Send a GET request with query parameters.

ParameterTypeRequiredDescriptionExample
birthDatestringUse YYYY-MM-DD format.1990-01-15
asOfstringUse YYYY-MM-DD format.example

Example Request

curl -G "https://api.tools.town/v1/date/age" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  --data-urlencode "birthDate=1990-01-15"

Example Response 200 OK

application/json
{
  "success": true,
  "data": {
    "years": "0",
    "months": "0",
    "days": "0",
    "totalDays": "0",
    "totalMonths": "0",
    "totalWeeks": "0",
    "nextBirthdayDays": "0",
    "nextBirthdayDate": "string"
  }
}

Error Codes

CodeMeaning
400Bad Request — missing or invalid parameter
401Unauthorized — API key missing or invalid
429Rate limit exceeded — free tier: 1,000 requests/month
500Internal Server Error — try again or contact support