All Time and Date Tools
All Time and Date Tools brings related tools together in a clear workflow. Core features are free and require no account.
● Private and mostly local in your browserHours Calculator
Calculate working time across midnight, subtract breaks and optionally estimate pay from an hourly rate. The duration is also shown in hours-and-minutes format.
Sleep Calculator
Find suggested bedtimes or wake times using four to six 90-minute cycles plus 15 minutes to fall asleep. Results are planning aids, not a sleep diagnosis.
Unix Timestamp Converter
Translate Unix timestamps into local time and UTC, or create seconds since 1 January 1970 from a date and time.
Clocks, World Time & Timers
Keep track of time, zones and sessions.
Recommended workflow
Choose the correct time reference, account for time zones and date boundaries, then verify the unit you need.
Frequently asked questions
Are my contents stored?+
Local tools do not send files or inputs to Tools Universe; personal settings remain in the browser.
Can I use the tools on mobile?+
Yes. Controls support current browsers on iPhone, Android, tablets and desktop computers.