Batter Peg Reduced Level Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
Enter Values
How to use this calculator
- Enter the reduced level (RL) at the hinge or string line.
- Enter the batter slope as the run per one unit of rise (a 2:1 batter is 2).
- Enter the horizontal offset from the hinge to the peg, and read the peg RL for a cut or a fill batter.
How it works
A batter slope is the horizontal run for each unit of vertical rise, so the vertical change over a horizontal offset is offset ÷ run.
A cut batter falls away from the hinge (peg RL = hinge RL − change) and a fill batter rises (peg RL = hinge RL + change). The tool shows both — use the one that matches your job.
Worked example
Hinge RL 50.000, 2:1 batter, 3 m offset. Vertical change = 3 ÷ 2 = 1.5 m, so a cut batter peg is RL 48.500 and a fill batter peg is RL 51.500.
Frequently asked questions
Does 2:1 mean two horizontal to one vertical?
Yes — 2:1 (H:V) is 2 m across for every 1 m up or down, a slope of 1 in 2. Enter the run (2) in the batter field.
Cut or fill — which RL do I peg?
A cut batter slopes down into the excavation (lower RL away from the hinge); a fill batter slopes up onto the embankment (higher RL). Pick the result that matches the earthworks.
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.