Age calculator with steps — compute age & date differences

Step-by-step examples: compute exact age from a date of birth, time until a future date, and the difference between two dates in days/years.

Tool

Use the main Age Calculator for interactive calculations: Open age calculator.

Examples

  1. Compute exact age
    Problem: DOB = 1990-03-07, Today = 2026-03-07
    1. Subtract years: 2026 − 1990 = 36
    2. Months and days match → exact age = 36 years
  2. Time until a future date
    Problem: From 2026-03-07 to 2030-01-01
    1. Compute years: 2030 − 2026 = 4 years
    2. Compute remaining months/days from month/day differences → result ≈ 3 years, 9 months, 25 days (use calculator for exact days)
  3. Days between two dates
    Problem: 2010-06-15 to 2020-11-20
    1. Calculator counts days including leap years → total = 3,841 days (example)
    2. Answer: use interactive tool for exact day count and breakdown

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