Mouse Age Calculator
This document provides two simple methods to accurately calculate the age of a mouse: an interactive Web Calculator for instant results, and a step-by-step Excel Tutorial for managing large colonies.

1. Web Calculator

Select the mouse's Date of Birth (DOB) below to instantly calculate its exact age in days and weeks.

2. Calculate Age in Excel

When managing a large mouse colony, calculating ages automatically using Microsoft Excel is highly efficient. Follow these steps:

  1. Set Column Headers: Create headers in row 1:
    A1: Birthdate, B1: Current Date, C1: Age (Days), D1: Age (Weeks).
  2. Enter Dates: In cell A2, input the DOB (e.g., 2024-01-15).
    In cell B2, enter the formula =TODAY() to automatically pull today's date.
  3. Calculate Age (Days): In cell C2, enter the formula =B2-A2. Ensure the cell format is set to 'General' or 'Number'.
  4. Calculate Age (Weeks): In cell D2, enter the formula =INT(C2/7) to convert total days into exact weeks (dropping decimals).
💡 Pro Tip: You can drag the formulas in columns B, C, and D downward to instantly calculate ages for your entire colony database.