Duration Between Two Dates (Years / Months / Days / Hours)

How long is it between two dates? Calendar arithmetic is fiddly because months have different lengths and years can be leap. This calculator gives you the duration in every unit — years + months + days + hours + minutes + seconds — plus a single-unit answer ("4327 days", "103848 hours").

How to use the Duration Between Two Dates (Years / Months / Days / Hours)

Pick two dates / times. The "decomposed" duration shows years + months + days + … like a human would describe it ("3 years, 4 months, 12 days"). The "single unit" table converts the total duration into each unit.