Free time planning tools
Convert time zones, timestamps, seconds, hours, HH:MM:SS values, calculate time between two dates or times, add and subtract elapsed durations, create countdowns, count business days, calculate week numbers, estimate playback time, sum video clips, and work with dates.
Best for meetings, logs, deadlines, launch countdowns, sprint labels, ISO week planning, seconds-to-hours conversion, HH:MM:SS cleanup, start-to-end duration checks, elapsed time arithmetic, editing timelines, learning plans, date math, and day-to-day time planning.
Category
Time tools
Access
Free
Browser-first utility pages
Each listed tool has its own page with focused controls, examples, assumptions, FAQs, and related tools.
Best for meetings, logs, deadlines, launch countdowns, sprint labels, ISO week planning, seconds-to-hours conversion, HH:MM:SS cleanup, start-to-end duration checks, elapsed time arithmetic, editing timelines, learning plans, date math, and day-to-day time planning.
Open an individual tool page when you need the actual controls, examples, assumptions, FAQs, and related links.
Use the tool descriptions and notes to decide whether you need a calculator, converter, formatter, generator, or planning helper.
If the workflow branches, use the related tools on each tool page to move to the next step.
Compare related tools, open the most specific utility for your job, and move between adjacent tasks.
Use this category page as the index; use individual tool pages for task completion.
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Time tools
This page groups related tools for easier browsing, while every individual tool page focuses on the specific workflow and output.
Can these tools help with global meetings?
Yes. The time zone converter compares IANA time zones and common global regions for meeting planning.
Can I convert Unix timestamps?
Yes. The timestamp converter handles Unix seconds, Unix milliseconds, ISO dates, UTC, and local time formats.
Can I convert seconds, hours, and HH:MM:SS values?
Yes. The time unit converter handles seconds to hours, hours to seconds, minutes to hours, HH:MM:SS to seconds, and seconds to HH:MM:SS.
Can I calculate time between two times and add durations?
Yes. The time duration calculator handles start and end date-time ranges, while the add/subtract time calculator handles elapsed duration arithmetic in hours, minutes, and seconds.
Can I calculate video or podcast time savings?
Yes. The playback speed calculator estimates adjusted completion time at different speeds.
Can I count working days between dates?
Yes. The business days calculator counts weekdays, weekends, calendar days, and manually excluded holiday dates.
Can I calculate ISO week numbers?
Yes. The week number calculator returns ISO week number, ISO week-year, day of year, quarter, and simple Sunday or Monday-start week numbers.
Can I create a deadline countdown?
Yes. The countdown calculator shows days, hours, minutes, and seconds remaining until a local target date and time.
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