Age calculator
Calculate exact chronological age in completed years, months, weeks, and total days between a birth date and any target date.
Runs directly in your browser with instant output, keyboard accessibility, and one-click copy.
Chronological Age Calculator
Exact Calendar SpanHandles varying month lengths
Counts completed calendar years and months first, then calculates remaining days accurately across 28, 29, 30, and 31-day months.
Secondary breakdown included
Displays total elapsed calendar days and full weeks alongside the standard years-months-days figure.
Pair with Date Converter
If your birth certificate or citizenship card lists a Bikram Sambat date, convert it to A.D. first with our Date Converter.
How chronological age is calculated
Enter the date of birth and the reference date (which defaults to today's date in Nepal). When you select Calculate exact age, the tool determines the number of completed calendar years and completed calendar months before counting the remaining days. This matches the method used for school admissions, Lok Sewa Aayog (Public Service Commission) eligibility checks, passports, and insurance forms.
Handling leap years and month-end birthdays
When a birth date falls on the 29th, 30th, or 31st of a month and the target month has fewer days (such as February), the calculator clamps the monthly anniversary to the final calendar day of that month so day counts never produce negative numbers or timezone drift.
Checking Lok Sewa Aayog and Nepal government service age limits
In Nepal, civil service examinations conducted by the Public Service Commission (Lok Sewa Aayog), banking recruitment notices, and security service intakes specify strict minimum and maximum chronological age thresholds (such as 18 to 35 years, or 40 years for female and inclusive-category candidates) calculated as of the final application deadline date. To verify eligibility accurately, first convert both your Bikram Sambat birth date and the published application deadline date to Gregorian (A.D.) using our Nepali Date Converter, then enter both dates here.
Common age calculation scenarios in Nepal
| Use Case | As-Of Date to Enter | Tip |
|---|---|---|
| Lok Sewa / Job Application | Application deadline date | Convert both B.S. birth date and deadline date to A.D. first |
| School / University Admission | Academic session cutoff date | Check completed years and months on the exact cutoff date |
| Passport / Visa Filing | Today's date | Default as-of date automatically uses current Nepal date |
| Senior Citizen Allowance / ID | Date of municipal filing | Verify completed years against citizenship certificate |
| Minor / Adult Legal Threshold | Event or contract date | Checks exact completed years, months, and days |
Common questions
How do I calculate my age from a Nepali Bikram Sambat birth date?
Open the Nepali Date Converter, switch your B.S. birth date to A.D., and enter that A.D. date here.
Can I check how old someone will be on a future date?
Yes. Change the 'Calculate age as of' field to any future date; the birth date simply needs to be on or before that target date.
Does my computer's timezone affect the age result?
No. All date math is performed using UTC calendar dates so daylight saving time or timezone offsets never shift a day.
How are February 29 (leap day) birthdays handled in non-leap years?
In a non-leap year, February has 28 days, so the monthly clamping rule evaluates February 28 as the completed month boundary before counting days in March.
Why does the calculator show both 'years, months, days' and 'total days'?
Official eligibility forms require completed calendar years, months, and days, while medical, infant, or project timelines often require total elapsed days and weeks.
Need to verify a source or report an issue?
All formulas, datasets, and official references used on Yannis are documented openly.