Can I change the assumptions?

Yes. Replace the example defaults with values from the current game, project, product, drawing, data sheet or market source.

No. It is an estimate produced by the displayed formulas and entered assumptions. Real results may differ because of factors described in the limitations section.

Should an important result be verified?

Yes. Verify important decisions with current source data, official documentation, manufacturer information or a qualified professional.

Arma Reforger Mortar Calculator

Estimate map bearing, horizontal range and mil-based angular correction between a mortar position and target coordinates in Arma Reforger. Enter your own values and review every assumption shown with the result.

Mortar EastingMortar NorthingTarget EastingTarget NorthingObserved Left/Right ErrorObserved Short/Long Error

Horizontal Range

1,000 m

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The primary result is displayed first, followed by supporting values that make the estimate easier to verify.

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How to Use This Calculator

Enter each requested value using the displayed unit. Replace the example defaults with source-specific values and review all assumptions.

Formula & Methodology

The calculator applies the displayed formulas directly to the entered values. Supporting outputs expose important intermediate calculations.

Worked example

Coordinates 600 m east and 800 m north of the mortar produce a 1,000 m horizontal range. A 10 m lateral miss at that distance is approximately a 10 mil correction.

The calculator does not reproduce the game's complete ballistic table, terrain height, air resistance, shell type, dispersion or patch-specific mortar behavior. Bearing normalization may need adjustment if your formula evaluator lacks modulo support.

For use inside a video game only. Do not use this tool for real-world weapons, targeting or fire-control activity.

Related Guides

How Arma Reforger Mortar Calculations Work: Range, Elevation, and Azimuth
Learn how to calculate mortar firing solutions in Arma Reforger — range from grid coordinates, elevation angle, and azimuth from observer to target using military map grid math.

Frequently Asked Questions

What does the Arma Reforger Mortar Calculator calculate?: Estimate map bearing, horizontal range and mil-based angular correction between a mortar position and target coordinates in Arma Reforger.
Can I change the assumptions?: Yes. Replace the example defaults with values from the current game, project, product, drawing, data sheet or market source.
Is the result exact?: No. It is an estimate produced by the displayed formulas and entered assumptions. Real results may differ because of factors described in the limitations section.
Should an important result be verified?: Yes. Verify important decisions with current source data, official documentation, manufacturer information or a qualified professional.

Last updated 7/23/2026