AC6 Build Calculator

An advanced tool to theory-craft your Armored Core build. Analyze weight, energy, and combat stats to dominate on Rubicon 3.

Frame Parts

Weapon Units

Internal Parts

What is an AC6 Build Calculator?

An ac6 build calculator is an essential tool for players of Armored Core 6: Fires of Rubicon. It allows you to simulate and plan your Armored Core (AC) assembly without having to purchase and equip parts in-game. By selecting different frame parts, weapons, and internal components, you can instantly see the effect on your AC’s total stats, such as AP (health), weight, and energy (EN) load. This process, often called “theory-crafting,” is crucial for creating effective and viable builds for both PvE missions and PvP combat.

The primary goal is to balance the trade-offs between powerful, heavy components and the limitations of your leg’s Load Limit and your generator’s EN Output. A proper ac6 build calculator will immediately tell you if your build is “overburdened” (too heavy) or “EN short” (not enough power), saving you time and in-game currency. For more information on core mechanics, see this guide on AC6 stats explained.

AC6 Build Formula and Explanation

The core of any AC build revolves around two main constraints: Weight and Energy. The calculator uses these fundamental formulas:

• Total Weight = ∑ (Weight of all individual parts)
• Total EN Load = ∑ (EN Load of all individual parts)

A build is considered valid only if:

1. Total Weight ≤ Leg Load Limit
2. Total EN Load ≤ Generator EN Output

This ac6 build calculator automatically sums the stats from every selected part and compares them against the critical limits imposed by your Legs and Generator. Other key stats like AP and defensive values are also summed from the relevant frame parts (Head, Core, Arms, Legs).

Key Variable Table

Variable	Meaning	Unit	Typical Range
AP (Armor Points)	The health or durability of your AC.	Points	8,000 – 17,000
Weight	The mass of a component. Contributes to Total Weight.	Mass units	1,500 – 50,000
Load Limit	The maximum Total Weight your legs can support.	Mass units	50,000 – 100,000+
EN Load	The energy consumed by a component.	Energy units	50 – 800
EN Output	The maximum EN Load your generator can supply.	Energy units	2,500 – 4,500+
Attitude Stability	Resistance to being staggered by enemy fire.	Points	1,500 – 2,500+

Practical Examples

Example 1: Lightweight Bipedal Build

A player wants a fast, agile AC. They choose lightweight NACHTREIHER parts, known for speed over defense. This keeps their Total Weight low, allowing for a booster with high Quick Boost speed. However, their low Load Limit prevents them from equipping heavy weapons like grenade cannons, forcing them to rely on machine guns and missiles. This is a classic high-risk, high-reward setup you can model with this ac6 build calculator.

• Inputs: Lightweight frame parts, energy-efficient generator, high-thrust booster.
• Units: Low AP (~9,500), low Weight (~65,000), low EN Load (~2,800).
• Results: A valid, highly mobile build that can’t sustain much damage but excels at evasion. Check our AC6 weapon calculator to optimize its damage output.

Example 2: Heavy Tank Build

Another player wants a durable, powerful build. They select the TANK legs (LG-022T BORNEMISSZA), which have a massive Load Limit and high AP. This allows them to equip dual Gatling Guns and dual Stun Needle Launchers. The trade-off is extremely slow movement and high EN consumption. The generator choice becomes critical to power this behemoth.

• Inputs: Heavy TANK legs, high AP core, high EN Output generator.
• Units: High AP (~16,000), high Weight (~95,000), high EN Load (~3,900).
• Results: A slow but incredibly powerful fortress. The calculator confirms the build is under the leg’s high Load Limit and that the powerful generator can sustain the high EN Load.

How to Use This AC6 Build Calculator

Using this tool is straightforward. Follow these steps to design your perfect AC:

1. Select Parts: Go through each category (Frame, Weapons, Internals) and pick a component from the dropdown menus.
2. Review Real-time Results: As you select parts, the “Build Analysis” section will update instantly. Watch the “Weight Load” and “EN Load” values closely. If the numbers turn red, your build is invalid.
3. Analyze Bar Charts: The visual bar charts provide a quick glance at how close you are to your limits. A full red bar means you are over the limit.
4. Check Detailed Stats: The table at the bottom shows a full breakdown of your AC’s stats, including defensive values, stability, and more. Use this to fine-tune your build for specific threats.
5. Reset and Iterate: Use the “Reset Build” button to start over. Experiment with different combinations to find the optimal balance for your playstyle. Discover more about Armored Core 6 assembly strategies.

Key Factors That Affect Your AC6 Build

Creating a successful build goes beyond just staying within limits. Consider these factors:

• Attitude Stability: High stability prevents you from being easily staggered. Heavy parts generally provide more stability.
• Boost Speed: Determined by your Booster’s thrust and your AC’s Total Weight. A lighter build is a faster build.
• FCS Performance: Your Fire-Control System (FCS) determines how well your weapons track targets at close, medium, and long range. Match your FCS to your weapon’s effective range.
• Generator Recharge: It’s not just about EN capacity; a generator’s recharge delay and supply rate determine how quickly you can recover energy after dodging or flying.
• Leg Type: Bipedal, Reverse Joint, Tetrapod, and Tank legs have fundamentally different movement styles, jump characteristics, and load-bearing capabilities. Understanding the nuances of AC6 frame parts is critical.
• Weapon Synergy: Combine weapons that complement each other. For example, use high-impact weapons to stagger an enemy, then switch to high-damage weapons to punish them. An overview of the best AC6 builds can provide great starting points.

Frequently Asked Questions (FAQ)

1. Why did my stats turn red in the ac6 build calculator?

Red text indicates your build has exceeded a critical limit. This is usually either the Total Weight exceeding the Leg’s Load Limit, or the Total EN Load exceeding the Generator’s EN Output. You must swap parts to bring the value back into the valid range.

2. What does AP stand for?

AP stands for Armor Points. It is the total health of your AC. It’s the sum of the AP from your Head, Core, Arms, and Legs.

3. Is higher Attitude Stability always better?

Generally, yes. Higher Attitude Stability makes your AC more resistant to being staggered, which is a critical state where you are vulnerable to massive damage. Heavy builds tend to have the highest stability.

4. Can I create a build that is good at everything?

No. Armored Core 6 is a game of trade-offs. A fast build will be fragile. A powerful, tanky build will be slow. The purpose of this ac6 build calculator is to help you find a specialized build that excels at a particular strategy.

5. How does the ‘Copy Results’ button work?

It copies a text summary of your build’s primary stats (AP, Weight, EN) to your clipboard, making it easy to share your creations with others.

6. Does this calculator include all parts from the game?

This calculator includes a representative selection of parts to demonstrate its functionality. It is designed to cover all major build archetypes and stat interactions you will encounter.

7. What is the difference between Load Limit and Weight?

‘Weight’ is the stat of an individual part. ‘Load Limit’ is a stat found only on Leg parts that determines the maximum ‘Total Weight’ (the sum of all parts) your AC can handle.

8. Why is my EN bar red even if I have a powerful generator?

Even a powerful generator has its limits. If you equip too many energy-hungry weapons (like laser or plasma cannons) and high-consumption boosters, your Total EN Load can still exceed the generator’s EN Output.

Related Tools and Internal Resources

If you found this ac6 build calculator useful, check out our other resources:

• AC6 Weapon DPS Calculator: Dive deep into the damage output, impact, and efficiency of every weapon.
• In-Depth Guide to AC6 Frame Parts: A detailed look at the stats and unique characteristics of every head, core, arm, and leg part.
• Top Tier: The Best AC6 Builds: A curated list of powerful and meta-defining builds for both PvP and PvE.
• The Art of AC6 Assembly: Learn the fundamental principles of building a balanced and effective Armored Core.