The height of a height-adjustable desk should be set based on the user's ergonomic needs to ensure comfort and reduce strain. Guidelines to determine the correct height for both sitting and standing positions:

Sitting Position

1. Elbow Height:

   • When seated, your elbows should be at a 90-degree angle or slightly greater when your hands are on the desk.
   • Your forearms should be parallel to the ground.
   • Typical Desk Height: For most people, this is about 25 to 30 inches (63 to 76 cm) from the floor.

2. Monitor Height:

   • The top of your monitor should be at or slightly below eye level.
   • Your screen should be about an arm's length away from you.

3. Feet Placement:

   • Your feet should be flat on the ground or on a footrest, with your knees at a 90-degree angle or slightly greater.

Standing Position

1. Elbow Height:

   • When standing, your elbows should again be at a 90-degree angle or slightly greater when your hands are on the desk.
   • Your forearms should be parallel to the ground.
   • Typical Desk Height: For most people, this is about 35 to 47 inches (89 to 119 cm) from the floor.

2. Monitor Height:

   • The top of your monitor should be at or slightly below eye level.
   • Your screen should be about an arm's length away from you.

3. Feet Placement:

   • Stand with your weight evenly distributed on both feet.
   • Use an anti-fatigue mat for added comfort if standing for extended periods.

Adjusting Your Desk

1. Use a Measuring Tape:

   • Measure from the floor to your elbows while sitting and standing to find your optimal desk height.

2. Fine-Tune:

   • Adjust your desk height and monitor position until you feel comfortable and aligned.
   • Ensure your wrists are in a neutral position, not bent up or down, when typing.

Summary

• Sitting Desk Height: Approximately 25 to 30 inches (63 to 76 cm) from the floor.
• Standing Desk Height: Approximately 35 to 47 inches (89 to 119 cm) from the floor.
• Monitor Height: Top of the monitor at or slightly below eye level.

Remember, these are general guidelines, and individual preferences and body dimensions may require adjustments. The key is to maintain a comfortable and ergonomic position to reduce strain and promote better posture.