Slide Timing Calculator

Divide your speaking time by the number of slides for a baseline, then adjust. Dense or demonstration slides deserve more, title and closing slides less. This calculator does the division, keeps whole seconds that add up exactly to your total, and can weight slides by type. As a sanity check, many speakers find more than one slide per minute hard to deliver well.

It depends on the format. A buffer of 10 to 20 percent of the slot is a common starting point for a talk with questions, and some conferences want zero because Q&A is scheduled separately. The buffer is taken from the end, so your slides finish before it and anything that overruns eats into questions rather than the next speaker.

Each slide is a baseline weight of 1. A slide whose title starts with words like Title, Welcome, Agenda, Thanks or Questions counts as 0.4. A title containing demo, live, workshop, exercise, hands-on, walkthrough, case study, deep dive, lab or code counts as 2.5. If you only give a slide count, the first and last slides are treated as light. It is a planning heuristic, so rehearse and adjust.

They tell you where you should be while presenting: "be on slide 12 by 8:30" means that slide should appear 8 minutes 30 seconds into the talk. If you add a start time, each checkpoint also shows the wall-clock time. Glance at the clock a few times and you will know early if you are running behind.

No. The calculation runs in your browser and your inputs are kept only in this browser. The plan is sent to TimedFlow only if you choose "Open in TimedFlow", which loads it into the timer in the same browser.