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Optimized Slots help you make the most out of your availability by going beyond fixed, predefined start times. Instead of only starting events on the hour or half-hour, Cal.com intelligently adjusts start times to accommodate as many appointments as possible, while still prioritizing clean start times when they’re available.

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How It Works

By default, event slots are generated at predefined intervals (for example, every 60 minutes starting on the hour). Optimized Slots adjust this logic so that your availability dynamically adapts around conflicts, ensuring no usable time is left behind.

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Example

Event Setup
  • Event length: 60 minutes
  • Availability: 9:00 AM – 11:30 AM
  • Busy time: 10:00 AM – 10:15 AM
Without Optimized Slots 
9:00 AM – 10:00 AM
With Optimized Slots
9:00 AM – 10:00 AM 10:15 AM – 11:15 AM
With Optimized Slots enabled, Cal.com adjusts the start time of your first slot to 10:15 AM after your busy block, allowing you to capture an extra meeting that would otherwise be impossible.

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Why Use Optimized Slots?

  • Maximize availability: Fit in more appointments throughout the day.
  • Stay flexible: Avoid wasted gaps caused by short conflicts.
  • Keep it clean: Still favors standard start times (on the hour/half-hour) when possible.

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How to Enable Optimized Slots

  1. Go to your event type.
  2. Open Advanced Settings.
  3. Toggle Optimized Slots on.
BrandBird 2025-09-23 16.39.59.png Once enabled, your scheduling automatically adjusts to create the most efficient slot lineup possible.