3-4-5 Method Calculator
Verify a 90-degree corner using the 3-4-5 method at any scale.
Estimate only — not a substitute for a licensed tradesperson, a certified engineer, or sign-off from your local building surveyor. Verify against current standards and site conditions before ordering materials or starting work.
Result
- Measure side B
- 4,000mm
- Diagonal must measure
- 5,000mm
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What this is based on
Geometry - Pythagoras / 3-4-5 diagonal check.
We cite the clause and link to the publisher so you can read the source yourself. We do not reproduce the text or tables of the NCC or of any Australian Standard.