Arma Reforger Mortar & Artillery Calculator

🚀
✨ Updated: BM-21 Grad MLRS Support
BM-21 ballistic data has been reworked to support two mods: SH BM-21 (SpearHead) and Integrity BM-21 Grad with updated fire tables and charge variants.
Loading ballistic data...

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This tool computes the elevation, azimuth, and charge needed to hit a target in Arma Reforger. No login, no install — runs in the browser.

Enter your weapon position, target position, and elevation as grid coordinates from the in-game map, pick a weapon, and press Calculate. Fire corrections and observer mode are optional, but a teammate acting as forward observer gives the most accurate fire.

💣 Mortars (M252, 2B14) are base-game weapons available on any server. 🔫 Howitzers and 🚀 MLRS require mod-added weapons — they only work if the server you're playing on has the relevant mods loaded. They also don't have height correction.

🎯 Supported Weapon Systems

💣 MORTARS
• US M252 (81mm)
• Soviet 2B14 (82mm)
🔫 HOWITZERS (MODS)
• WZ US M119 (105mm)
• WZ Soviet D-30 (122mm)
🚀 MLRS (MODS)
• SH BM-21 Grad (122mm)
• Integrity BM-21 Grad (122mm)
• WZ Type-63 (107mm)

📜 Mission History

Coordinate Input:
Grid: in-game map coordinates (always shown on the Arma Reforger map).
Meters: only use if you know the map's exact dimensions in meters.

1️⃣ Weapon System and Ammunition

Select your weapon system type. Each weapon has its own ballistic data. Height correction data is only available for mortars
Select your ammunition type. Different ammunition types have different ballistic data.

2️⃣ Weapon Position

3-digit grids mark 100×100 m squares; add a 4th digit to point to a 10×10 m sub-square (e.g. 150 450 → 1505 4505 = center of that square). The in-game ruler helps you read sub-square offsets.
Map coordinates in meters (e.g., 4800.5, 7049.0)
Elevation above sea level — hover the ingame map. Height correction only applies to mortars (M252, 2B14); howitzers and MLRS ignore this field.

3️⃣ Target Position

3-digit grids mark 100×100 m squares; add a 4th digit to point to a 10×10 m sub-square (e.g. 150 450 → 1505 4505 = center of that square). The in-game ruler helps you read sub-square offsets.
Map coordinates in meters (e.g., 4696.0, 5516.0)
Elevation above sea level — hover the ingame map. Height correction only applies to mortars (M252, 2B14); howitzers and MLRS ignore this field.
💡 Recommendation
Inputs changed — recompute to update

🔄 Adjust Fire: Gun-Target (GT) line

🔭 Use Observer-Target (OT) line
Forward Observer's own map position — used to translate left/right and add/drop adjustments into a corrected aim point. Best accuracy comes from a teammate acting as forward observer with eyes on the target.
Forward Observer's own position in meters — used to translate left/right and add/drop adjustments into a corrected aim point. Best accuracy comes from a teammate acting as forward observer with eyes on the target.
⚠️ Please enter observer coordinates to use OT mode
Right: +, Left: − (Range: -500 to +500m)
Add: +, Drop: − (Range: -500 to +500m)