What does this Arma Reforger mortar calculator do?

It computes azimuth, elevation and charge for mortar fire missions in Arma Reforger using engine-accurate ballistics. It also synchronizes time-on-target (TOT) for simultaneous impact, plots trajectories and range cards, triangulates targets from forward-observer bearings, overlays a synced tactical map built on real Arma Reforger heightmaps with elevation data, applies wind correction, warns on danger-close fire, and shares fire missions to Discord — solo or in real-time multiplayer with your squad.

Which mortar systems and rounds are supported?

The calculator supports the US M252 (81mm) and Russian 2B14 Podnos (82mm), with HE/fragmentation, smoke and illumination rounds. Selecting a weapon and round type automatically loads the correct charge tables and muzzle-velocity data, and you can override the charge globally or per tube.

How accurate is the ballistics?

The trajectory model is derived from Arma Reforger's own ballistics data — the in-game weapon prefab coefficients and wind tables — rather than real-world artillery tables, so the azimuth, elevation and time-of-flight it produces match what actually happens in the game.

Does it support forward observers and triangulation?

Yes. The triangulation panel lets multiple forward observers enter their own grid position and a compass bearing to the enemy; the calculator intersects the lines of bearing with a least-squares solve to compute the target grid, which you can then import as a fire mission. Observers can join a multiplayer session in a dedicated observer role.

What is the tactical map?

The tactical map is a shared mosaic that tiles every saved target image by its real-world position. Click any 100m cell to load that area into the calculator, build maps from pasted imagery, and use the synced distance-measure and draw/erase markup tools. It can use real Arma Reforger heightmaps (Everon, Arland, Kolguyev and more) for automatic elevation, topographic contour lines and a terrain-flatness heatmap for choosing firing positions.

Can multiple people use it at the same time?

Yes. A real-time multiplayer session lets a fire-direction team share and synchronize positions, targets, wind, the tactical map and fire missions over peer-to-peer connections. One user hosts and others join with a session code as either a mortar operator or a forward observer.

Discord

MORTAR CALCULATOR

SESSION ACTIVE

WEAPON SYSTEM

ELEVATION FILE

TUBES

YOUR POSITION SUB-GRID

YOUR POSITION

NO FILE SELECTED

TARGET POSITION

NO FILE SELECTED

FLIGHT CURVE

IMPACT DISPLAY

Offset: +0m, +0m

WIND

WIND SPEED (M/S) WIND FROM (COMPASS DEG)

Wind not yet edited

WIND

TRIANGULATION

TRIANGULATE

FIRE MISSIONS

DISCORD

Nothing sent yet

DISCORD

FIRE CONTROL

READY

MORTAR CALCULATOR

WIND

TRIANGULATION

FIRE MISSIONS

DISCORD

FIRE CONTROL

MULTIPLAYER SESSION

EXPORT PROFILE

REPORT AN ISSUE

GRID ELEVATION SHORTCUTS

TACTICAL MAP SHORTCUTS

TACTICAL MAP