Site Set-out Tolerance Report
A free, browser-based tool. Runs entirely in your browser — no sign up, nothing stored.
Tolerances
Set-out differences
Enter each point’s as-built minus design difference (metres).
| Point | dE (m) | dN (m) | dRL (m) | |
|---|---|---|---|---|
Runs entirely in your browser.
Report
| Point | Horizontal | Vertical | Result |
|---|---|---|---|
| SP1 | 9 mm | 4 mm | PASS |
| SP2 | 50 mm | 20 mm | FAIL |
Horizontal residual = √(dE² + dN²); vertical = |dRL|. A point passes when both are within tolerance.
How to use this calculator
- Set the allowed horizontal and vertical tolerances (metres).
- For each point, enter the as-built minus design difference in easting, northing and level.
- Read the horizontal and vertical residual per point, each flagged pass or fail, with a summary.
How it works
The horizontal residual combines the easting and northing differences: residual = √(dE² + dN²). The vertical residual is the absolute level difference |dRL|.
A point passes when both residuals are within their tolerances. The summary counts passes and fails and reports the largest horizontal and vertical residuals across the job.
Worked example
A point 50 mm out of position. dE 0.030, dN 0.040 gives a 0.050 m horizontal residual — outside a 0.020 m tolerance, so the point fails even before checking level.
Frequently asked questions
Do I enter design and as-built, or the difference?
The difference (as-built minus design) for each axis. Most controllers report these deltas directly; if not, subtract design from as-built first.
What tolerance should I use?
Use the tolerance set by your project specification or drawing — this tool just checks against whatever you enter. Set-out tolerances vary widely by element and stage.
Is this official course material?
No. It is free study support mapped to surveying course levels — not official North Metropolitan TAFE content or advice. Always follow your lecturer and the official assessment brief, and check your own working.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.