Days between two dates, done right
Pick any two dates and get the gap between them as total days, calendar-accurate years/months/days, weeks, hours, and working days. It handles leap years and unequal month lengths correctly, and lets you choose whether the end date itself counts.
Worked example
From 25 July 2026 to 31 December 2026 is 159 days — 5 months and 6 days, or 22 weeks and 5 days, containing 115 working days. Planning backwards like this is the quickest way to sanity-check a project timeline or count down to an event.
Common uses
Project deadlines and sprint lengths, notice periods, visa and passport validity windows, pregnancy and medical timelines, rental and subscription periods, interest day-counts, and simple "how long until…" countdowns.