Dipping Hole Toe Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserIntermediate
Enter Values
Enter your values and press Calculate to see results.
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
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.