Convert between different time units including seconds, minutes, hours, days, weeks, months, years, and more. Essential for scheduling, project planning, and everyday time calculations.
International System of Units (SI) measurements
Specialized and historical measurements
Scientific and technical measurements
s (second), ms, µs, ns
min, h, day
week, month, year, leap year
ps, fs
sidereal day, tropical year
Time is one of the seven fundamental physical quantities in the International System of Units (SI). The second is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.
Time units are used in countless applications, from everyday scheduling and project management to scientific research, astronomy, and high-speed electronics. Our converter handles both common time units and specialized scientific measurements.
The converter includes calendar-based units like months and years, which are approximate since they vary in actual duration. For precise calculations, consider using the exact number of days or the astronomical units provided.
Try combining multiple tools for a complete workflow. For example: Notepad → Text Encryption → Save to Cloud or Date Calculator → Calendar → Countdown Timer
Convert text to Base64 format and decode Base64 strings
Format, validate, and minify JSON data with syntax highlighting and error detection
Convert between YAML and JSON formats with validation and formatting
We'd love to hear your thoughts! Your feedback helps us improve our tools and create a better experience for everyone.
Tell us what you think about this tool