Calculate the Precise Time Between Two Dates

How long is it until your next vacation? How many hours did that project take? Our Time Duration Calculator provides precise answers to these questions. This tool is designed to find the exact amount of time that has passed between any two points in time, from seconds to centuries.

How It Works

The calculator takes a start date/time and an end date/time and finds the difference between them down to the millisecond. It then presents this duration in two useful ways: as a detailed breakdown (e.g., 1 year, 2 months, 3 days...) and as a total in various units (e.g., total days, total hours).

Key Features

  • High Precision: Calculates the duration with precision down to the second.
  • Detailed Breakdown: Get the result broken down into centuries, decades, years, weeks, days, hours, minutes, and seconds.
  • Total Unit Conversion: See the total duration expressed in different units, such as total days, total hours, or total seconds.
  • Easy Date Entry: Use the convenient date and time pickers to set your start and end points. "Now" buttons let you quickly use the current time.
  • Swap Functionality: Instantly swap the start and end dates with a single click.

How to Use the Time Duration Calculator

  1. Step 1: Set the Start Date and Time
    Use the input fields to enter the starting moment. You can click the "Set to Now" button to use the current time.
  2. Step 2: Set the End Date and Time
    Enter the end moment in the second set of fields.
  3. Step 3: View the Duration
    The tool will automatically calculate and display the duration between the two points. The main result shows a full breakdown, while the list below provides the same duration in different total units.

Find Our Tool

Time Duration Calculator, Duration Between Dates, Time Difference, Date Difference Calculator, Hours Between Dates, Time Elapsed Calculator.