Scheduling

Time Duration Calculator

Add or subtract time durations and convert between hours, minutes, and seconds. Use this Time and dates tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Useful for calculating total time from multiple segments — e.g., adding up song lengths, activity times, or work intervals. Handles rollover between minutes and hours automatically.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

How do I convert hours to minutes?

1 hour = 60 minutes = 3600 seconds. To convert 1.5 hours: 1.5 × 60 = 90 minutes = 5400 seconds.