Time Converter
Convert between any time units — from nanoseconds to millennia. Choose your units from the dropdowns, enter a value, and get instant results.
Convert time
Quick references
Full conversion table
All units converted from your entered value, grouped by category.
Enter a value above to see all conversions.
Date duration calculator
Find the difference between two dates, or add / subtract time from a date.
Date difference
Add or subtract time from a date
Time reference guide
Notable durations — from the blink of an eye to the age of everything.