Event-duration planner
Add up an event's total running time from its planned activities, including buffer time between each one for transitions.
Result
Total event length
Total event length
How to use this calculator
- Enter the number of planned activities (speeches, performances, agenda items).
- Enter the average length of each.
- Set a buffer between activities for transitions.
- Read the total event length.
Assumptions
- Assumes all activities are a similar length — for very different activity lengths, add them up individually instead for a more precise total.
Technical details: what the fields mean
- Number of activities
numberOfActivities - Number of distinct activities or agenda items planned.
- Average minutes per activity
minutesPerActivity - Average length of each activity.
- Buffer between activities
bufferMinutes - Transition time between activities — for seating changes, setup or applause.
Methodology
Total time = (activities × average length) + (buffer × number of gaps between activities).
Worked example
6 activities, 15 minutes each, 10-minute buffer
Inputs: numberOfActivities=6, minutesPerActivity=15, bufferMinutes=10
Result: 2.33 hours (140 minutes)
Practical guidance
- Always build in some contingency time beyond this calculation — events routinely run over their planned schedule.
Common mistakes
- Forgetting buffer time between activities entirely, which routinely makes real events run over their planned schedule.
FAQs
How long will my event run for?
Multiply activities by their average length, then add buffer time for the gaps between them — this calculator does that directly.