Docs/APIs/Age Calculator

Age Calculator

Calculate Age from Date of Birth

OperationalCredits 1 per callp50 295msCalendarStar

Overview

Age Calculator works by analyzing the date of birth provided and calculating the age. It uses advanced algorithms to calculate the age based on the date of birth and returns the calculated age.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

GEThttps://api.apiverve.com/v1/agecalculator
curl "https://api.apiverve.com/v1/agecalculator?dob=1990-08-02&timezone=America%2FChicago" \
  -H "x-api-key: your_api_key_here"
const res = await fetch('https://api.apiverve.com/v1/agecalculator?dob=1990-08-02&timezone=America%2FChicago', {
  headers: { 'x-api-key': 'your_api_key_here' },
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);
import requests

res = requests.get(
    "https://api.apiverve.com/v1/agecalculator?dob=1990-08-02&timezone=America%2FChicago",
    headers={"x-api-key": "your_api_key_here"},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])
package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/agecalculator?dob=1990-08-02&timezone=America%2FChicago", nil)
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Parameters

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.

ParameterTypeDescription
dobRequiredstringThe date of birth to calculate the age from (format: YYYY-MM-DD)
date
timezoneOptionalstringIANA timezone used to interpret the date of birth and to determine "today" when computing the age
default America/Chicago · timezone

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response
{
  "status": "ok",
  "error": null,
  "data": {
    "dob": "1990-01-01",
    "age_breakdown": {
      "years": 35,
      "months": 431,
      "weeks": 1876,
      "days": 13133,
      "hours": 315208,
      "minutes": 18912499,
      "seconds": 1134749976
    },
    "age_words": {
      "years": "thirty-five",
      "ordinal": "thirty-fifth",
      "full": "thirty-five years old",
      "locale": "en-US"
    },
    "timezone": "America/Chicago",
    "locale": "en-US",
    "next_birthday": {
      "months": 0,
      "weeks": 2,
      "days": 15,
      "hours": 367,
      "minutes": 22060,
      "seconds": 1323623
    },
    "insights": {
      "generation": "Millennial",
      "zodiacSign": "Capricorn",
      "chineseZodiac": "Horse",
      "birthstone": "Garnet",
      "dayOfWeekBorn": "Monday",
      "isLeapYearBirth": false,
      "milestones": {
        "canVoteUS": true,
        "canDrinkUS": true,
        "canRentCarUS": true,
        "seniorDiscount": false
      }
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

FieldTypeExampleDescription
dobstring"1990-01-01"Date of birth as provided in request (format: YYYY-MM-DD)
age_breakdownobject{...}Age expressed in years, months, weeks, days, hours, minutes, and seconds
yearsnumber35Person's age in complete years
monthsnumber431Total age in months
weeksnumber1876Total age in weeks
daysnumber13133Total age in days
hoursnumber315208Total age in hours
minutesnumber18912499Total age in minutes
secondsnumber1134749976Total age in seconds
age_wordsobject{...}Age expressed in words (e.g., thirty-five years old)
yearsstring"thirty-five"Age in written word form (e.g., thirty-five)
ordinalstring"thirty-fifth"Age in ordinal word form (e.g., thirty-fifth)
fullstring"thirty-five years old"Age as complete phrase (e.g., thirty-five years old)
localestring"en-US"Locale used for word generation (e.g., en-US)
timezonestring"America/Chicago"Timezone associated with the calculation (e.g., America/Chicago)
localestring"en-US"Locale code for the response (e.g., en-US)
next_birthdayobject{...}Countdown to next birthday in months, weeks, days, hours, minutes, seconds
monthsnumber0Months until next birthday
weeksnumber2Weeks until next birthday
daysnumber15Days until next birthday
hoursnumber367Hours until next birthday
minutesnumber22060Minutes until next birthday
secondsnumber1323623Seconds until next birthday
insightsobject{...}
generationPremiumstring"Millennial"Generational cohort (e.g., Millennial, Gen Z, Baby Boomer)
zodiacSignPremiumstring"Capricorn"Western zodiac sign based on birth date (e.g., Capricorn, Leo)
chineseZodiacPremiumstring"Horse"Chinese zodiac animal based on birth year (e.g., Dragon, Tiger)
birthstonePremiumstring"Garnet"Traditional birthstone for birth month (e.g., Diamond, Ruby)
dayOfWeekBornPremiumstring"Monday"Day of the week person was born (e.g., Monday, Friday)
isLeapYearBirthPremiumbooleanfalseWhether the person was born in a leap year
milestonesPremiumobject{...}Legal milestones achieved (canVoteUS, canDrinkUS, canRentCarUS, seniorDiscount)
canVoteUSPremiumbooleantrueWhether person is eligible to vote in United States elections
canDrinkUSPremiumbooleantrueWhether person is legal age to drink alcohol in United States
canRentCarUSPremiumbooleantrueWhether person meets age requirement to rent cars in United States
seniorDiscountPremiumbooleanfalseWhether person is eligible for senior citizen discounts

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

StatusMeaningWhat to do
400Input was rejectedRead error; it names the parameter.
401Key missing or invalidCheck the header name and the key value.
403Key valid, but not permittedA key restriction or IP allow-list; see key scoping.
429Rate limited, or out of creditsRead error to tell them apart; see rate limits.

Other ways to use Age Calculator

Set up Age Calculator on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKitReference →
Use it in Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheetsReference →
Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContextReference →

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