In India, people often use the words completed age and running age. They are not the same.
The Age Difference Calculator gives the exact gap between two birth dates. For a form, you must also check which type of age the form asks for.
What is completed age?
Completed age means the number of full years a person has finished.
Example: Riya was born on 10 October 2000. On 1 September 2026, she has not reached her birthday for that year. Her completed age is 25 years.
Completed age is the number most official forms use when they ask for “age in completed years”.
What is running age?
Running age means the year of life a person is currently living.
In the example above, Riya has completed 25 years and is living her 26th year. People may say her running age is 26.
Running age is common in normal conversation, but it may not be accepted on an official form.
What is exact age?
Exact age includes years, months and days.
For example:
25 years, 10 months and 22 days
This gives more detail than completed or running age.
Which age should you write on a form?
Read the form carefully.
- If it asks for completed years, write only the full years finished.
- If it gives a cut-off date, calculate age on that date.
- If it asks for date of birth, enter the date exactly as shown on your document.
For exams, jobs, insurance or government work, always follow the official notice. Do not guess from normal conversation.
Use the Age Difference Calculator