Dipping Hole Toe Calculator
Computes the toe reduced level and reach of a dipping hole from collar RL, length and angle.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the collar RL, hole length and angle from vertical.
- Press Calculate.
- Read the toe RL and horizontal reach.
How it works
Toe RL = collar RL − (hole length × cos(angle)); the horizontal reach shows how far the toe sits from the collar in plan.
Worked example
Collar RL 250, 12 m at 15°. Toe RL ≈ 238.4 m.
Frequently asked questions
What is the toe?
The bottom of the blast hole. Its RL and position determine the bench floor level and burden at the base.
Related tools
- Toe Position Calculator
- Hole Angle Deviation Calculator
- Decking Ratio Calculator
- Blast Area Calculator
- Blast Hole Count Checker
- Blast Pattern Designer
Explore more in Mining, Quarry, Earthworks, Drill & Blast.
Cite this tool
Zerdly. (2026). Dipping Hole Toe Calculator. Retrieved from https://www.zerdly.com/tools/dipping-hole-toe-calculator/
Tip: Enter any known values to calculate the remaining results.
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