Rock Mass Rating (RMR) Empirical Scoring Formula calculator

Quick Answer

Calculate Rock Mass Rating (RMR) Empirical Scoring Formula

Result Interpretation

Rock Mass Rating (RMR) Empirical Scoring Formula calculator computes Rock Mass Rating (RMR) in dimensionless using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

Uniaxial Compressive Strength Rating = 15
RQD Rating = 17
Joint Spacing Rating = 12

Expected Result:

Rock Mass Rating (RMR) = 44

Engineering Interpretation:

Under the given input conditions, the calculated result is: Rock Mass Rating (RMR) = 44 dimensionless.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

RMR = uniaxial compressive strength rating + rqd rating + joint spacing rating

Formula family: formula_geology_rock_mass_rating_rmr_calculator

Variables

Symbol	Label	Role	Description
Uniaxial Compressive Strength Rating	Uniaxial Compressive Strength Rating	INPUT	Uniaxial Compressive Strength Rating
RQD Rating	RQD Rating	INPUT	RQD Rating
Joint Spacing Rating	Joint Spacing Rating	INPUT	Joint Spacing Rating
Rock Mass Rating (RMR)	Rock Mass Rating (RMR)	OUTPUT	Rock Mass Rating (RMR)

Calculation Steps

Enter the uniaxial compressive strength rating in dimensionless.
Enter the rqd rating in dimensionless.
Enter the joint spacing rating in dimensionless.
Step 1: Compute rock mass rating (rmr).
Read the rock mass rating (rmr) (dimensionless) from the results.

Engineering Summary

Calculate Rock Mass Rating (RMR) Empirical Scoring Formula

Frequently Asked Questions

What does this calculator calculate?

The Rock Mass Rating (RMR) Empirical Scoring Formula calculator estimates Rock Mass Rating (RMR) based on the input parameters you provide

Why is uniaxial compressive strength rating important in this calculation?

uniaxial compressive strength rating is directly proportional to rock mass rating (rmr). When you enter uniaxial compressive strength rating in dimensionless, the calculator uses it in the engineering formula to compute the output

How should I interpret the result rock mass rating (rmr)?

The calculator outputs rock mass rating (rmr) in dimensionless. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Uniaxial Compressive Strength Rating (dimensionless), RQD Rating (dimensionless), Joint Spacing Rating (dimensionless). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment