A common people ask is how long does it take to climb Kilimanjaro? Budget and time permitting, we recommend that you climb for at least 7 and ideally 8 days.
Taking your time helps you to acclimatize naturally to the high altitude and therefore reduces discomforts and the risks of altitude sickness. The better you acclimatize, the more likely you will reach the summit (and safely so).
There is statistical evidence that 7 days leads to a higher summit success rate than 5 or 6 days. Route permitting, you may even want to consider 8 days or more. However, please note that we do not (yet) see sufficient evidence that your summit success chance significantly further improves beyond 7 or 8 climbing days.