Hinge Placement Calculator

Exactly where to locate door hinges, with a placement breakdown that repositions as you adjust count and dimensions. Hinge size is recommended from the door weight.

RECOMMENDED HINGE
—
sized for door weight

Usage Tip

Use 3″ screws into the stud for the jamb-side hinge — not just into the casing. For exterior doors, use ball-bearing hinges.

THE MATH
Top hinge 7″ from top  •  bottom 11″ from bottom
Middle hinges evenly distributed (3-hinge sits at door center)
• Hinge size is set by door weight; screws are sized to match
• Doors over 80″ tall or 50 lbs want a minimum of 4 hinges
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.