Home lock calculator
Strike Plate Compatibility Checker
Screen strike plate dimensions before ordering replacement hardware.
Result
Measured door gap (in)
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Required screw length (in)
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Common T-strike size (1 = yes)
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Formula
Calculation logicStrike alignment and screw spacing matter as much as plate size.
Strikes, Handing, and Swing
Strike first, lock second
A 2-1/4 in T-strike is the common swap. For kick-in resistance, fit a security strike with 3-in screws that bite the stud, not just the jamb.
Order the right hand
Stand outside facing the door. Hinges left + swings in = left-hand (LH). Outswing doors reverse the code (LHR/RHR) and want security hinges. Most smart keypads assume a handing, so set it on install day.
Verify before you buy
- Measure plate end to end with a ruler
- Check gap with the door closed
- Confirm 3-in screws bite the stud