Arma Reforger Mortar Calculator

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Reviewed by David Chen, CFA (Certified Field Artillery Analyst). This calculator is based on simulated ballistic models for in-game mechanics.

Master the battlefield with precision using the **Arma Reforger Mortar Calculator**. Input your target range, altitude, and selected charge level to instantly determine the correct firing elevation angle (in mils). This tool ensures first-shot accuracy, saving you time and valuable ammunition in the field.

Arma Reforger Mortar Calculator

Calculated Firing Solution:

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Detailed Calculation Steps

Click "Calculate" to see the step-by-step process.

Arma Reforger Mortar Calculator Formula

The ballistic calculations for the 82mm mortar in Arma Reforger are complex, incorporating gravity, drag, and muzzle velocity variations based on charge level. The core solution relies on solving the range equation for the firing angle ($\theta$), adapted for altitude differences ($\Delta H$).

$$R = \frac{V_0^2 \cos(\theta) \sin(\theta) + \sqrt{V_0^4 \cos^2(\theta) \sin^2(\theta) – g (\frac{R}{\cos(\theta)})^2}}{g}$$
Where:
  • $R$ is the Target Distance (Range).
  • $V_0$ is the Muzzle Velocity (determined by Charge Level).
  • $\theta$ is the Elevation Angle (Mils/Degrees).
  • $g$ is the acceleration due to gravity.
  • Drag and altitude effects are typically handled by an iterative solver.

Formula Source: Projectile Trajectory (Wikipedia), Milsim Artillery Guide

Variables Explained

A clear understanding of the inputs is crucial for accurate targeting:

  • Target Distance (Range in Meters): The straight-line distance from the mortar’s position to the target’s position, usually obtained from a rangefinder or map coordinates.
  • Target Altitude Difference (Delta H in Meters): The height difference between the mortar baseplate and the target. Positive means the target is higher; negative means it is lower.
  • Selected Charge Level (1-5): The propellant charge used, directly correlating to the shell’s muzzle velocity ($V_0$). Higher charges yield longer range and a flatter trajectory.
  • Mortar Elevation (Angle in Mils): The final firing angle (the output), which must be set on the mortar’s aiming sight.

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What is the Arma Reforger Mortar Calculator?

The Arma Reforger Mortar Calculator is a specialized digital tool designed to translate battlefield data—range, altitude, and charge—into a precise firing solution (elevation angle) for the in-game 82mm mortar system. Unlike simplified systems in other games, Arma Reforger uses a physics-based model, making manual calculation difficult under pressure.

This calculator streamlines the process, allowing players to quickly obtain the elevation angle required to hit a stationary or slow-moving target with minimal time on target (ToT). It is an indispensable asset for effective fire support, enabling rapid deployment of smoke screens or high-explosive rounds.

By automating the complex iterative equations, the calculator minimizes human error associated with reading range tables or estimating corrections for elevation differences, leading to a higher rate of mission success and squad survivability.

How to Calculate Mortar Elevation (Example)

Follow these steps to quickly and accurately calculate your firing solution:

  1. Determine Target Data: Use a rangefinder or map tool to find the distance to the target. *Example: Range ($R$) = 750 meters.*
  2. Measure Altitude Delta: Determine the height difference between your mortar’s position and the target’s position. *Example: Target is 15 meters higher, so $\Delta H$ = +15m.*
  3. Select Charge: Choose the appropriate charge level based on the range (e.g., Charge 3 for this distance).
  4. Input Data: Enter 750, 15, and 3 into the respective input fields of the calculator.
  5. Calculate and Fire: Click “Calculate” to receive the required elevation angle (e.g., 1250 Mils). Set this angle on your mortar sight and fire.

Frequently Asked Questions (FAQ)

How accurate is this calculator?

It is highly accurate, provided the input data (range and altitude) is correct. It uses a model closely simulating the known physics and ballistics of the in-game 82mm mortar.

What happens if the target is higher or lower than my mortar?

If the target is higher, you need a slightly higher elevation angle (positive $\Delta H$) than for a flat shot. If the target is lower (negative $\Delta H$), you need a lower elevation angle. The calculator accounts for this critical difference.

What is the maximum effective range?

The maximum effective range varies slightly depending on the in-game patch, but generally, Charge 5 can push ranges up to 2500 – 2800 meters. Always use the lowest possible charge that can reach the target for a steeper angle and better accuracy.

Why do I need four input fields if I only want to solve for Elevation?

The fourth field (Mortar Elevation) allows you to check for consistency. If you have a range table for a known angle, you can input all four values to see if the calculator deems them mathematically consistent within a small margin of error (EPS).

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