Anarchy Online: How Is Attack Calculated?
Use this premium calculator to estimate your effective attack rating, compare it against a target’s defense, and visualize how your hit chance changes across different evade values. This tool uses the standard weighted-skill approach for attack rating and a practical hit-chance estimator for planning setups, PvM tuning, and PvP comparisons.
Attack Calculator
Understanding Anarchy Online Attack Calculation
When players search for “anarchy online how is attack calculated,” they are usually trying to answer one of three practical questions: what is my actual attack rating, how much does Add All Offense help, and what happens when my attack value is compared against an enemy’s evade or defense number? In Anarchy Online, the most useful starting point is to separate the problem into two stages. First, you calculate your effective attack rating from the weapon’s listed attack skill percentages. Second, you compare that attack value against the target’s relevant defensive rating, which is generally built from an evade skill plus Add All Def. Once you understand those two steps, gearing decisions become much more logical.
The reason this topic feels confusing is that Anarchy Online is not a simple one-stat game. Many weapons are 100% based on a single weapon skill, but others use split attack templates such as 67% of one skill and 33% of another. That means two characters with the same visible “main” weapon skill can have different real attack performance if one setup boosts a secondary attack skill while the other ignores it. Add All Offense then stacks on top of the weighted result, making general offensive gear surprisingly valuable even when it does not raise the core weapon skill directly.
The Core Formula Most Players Use
For a practical and highly useful estimate, players often calculate attack with this structure:
- Identify the attack-skill percentages listed on the weapon or item.
- Multiply each skill by its percentage contribution.
- Add those weighted pieces together.
- Divide by 100 to get weighted attack skill.
- Add Add All Offense to produce effective attack rating.
Written more directly, the formula looks like this:
Effective Attack Rating = ((Skill 1 × Percent 1) + (Skill 2 × Percent 2) + (Skill 3 × Percent 3)) ÷ 100 + Add All Offense
If a weapon is 100% Assault Rifle and you have 2200 Assault Rifle with 300 Add All Offense, your weighted attack skill is 2200 and your effective attack rating is 2500. If the weapon is split 67% Assault Rifle and 33% Ranged Energy, then both skills matter. A character with 2200 Assault Rifle and 1800 Ranged Energy would have a weighted skill of 2068 before Add All Offense, not 2200.
| Example Attack Template | Skill Mix | Sample Skill Values | Weighted Attack Skill | With +300 Add All Offense |
|---|---|---|---|---|
| Single-skill weapon | 100% Assault Rifle | 2200 AR | 2200 | 2500 |
| Two-skill weapon | 67% Assault Rifle / 33% Ranged Energy | 2200 AR / 1800 RE | 2068 | 2368 |
| Mixed template | 80% Pistol / 20% Fling Shot | 2100 Pistol / 1600 Fling | 2000 | 2300 |
| Three-skill template | 50% Bow / 30% Aimed Shot / 20% Physical Init | 2000 Bow / 1700 AS / 1500 Phys Init | 1810 | 2110 |
Why Add All Offense Matters So Much
Add All Offense is powerful because it applies after the weighted skill calculation. It does not care whether your weapon is 100% one skill or uses a split template. In other words, +50 Add All Offense contributes a full +50 effective attack rating in this simplified model. That makes offensive armor, research bonuses, towers, contracts, temporary buffs, and symbiants easier to evaluate. If your setup can gain 100 Add All Offense without giving up too much defense, you generally know exactly what that gain is worth on your attack side.
This is also why players comparing two setups should avoid focusing only on the visible weapon skill in the stat window. A setup with lower raw Assault Rifle but much higher Add All Offense, or a setup that lifts an important secondary attack skill, may produce the stronger final result. The cleanest approach is always to calculate the weighted attack skill first, then add your Add All Offense.
How Defense Is Compared Against Attack
After your effective attack rating is estimated, you still need to compare it to the target’s defensive value. For ordinary attack discussions, players normally model the target’s defense as:
Defense Rating = Relevant Evade Skill + Add All Def
The exact skill can vary depending on what is attacking and what is defending. For a ranged normal attack, Dodge-Ranged is often the main point of comparison. For many melee interactions, Evade-ClsC may be more relevant. Duck-Exp also matters for particular weapons and checks. Add All Def then raises the target’s practical defensive strength across those checks. This means a character with moderate evade skills but very high Add All Def may be much harder to hit than their base skill number suggests.
A useful planning estimator for hit chance is:
Estimated Hit Chance = Attack Rating ÷ (Attack Rating + Defense Rating)
This is not a promise of the exact hidden server implementation for every situation in the game, but it is a reliable comparison tool. It tells you what happens directionally and gives you a practical percentage for evaluating upgrades. More attack raises your numerator. More defense on the opponent increases the denominator. If both sides grow, the ratio determines who gains more real advantage.
Sample Hit-Chance Statistics
Using the estimator above, here is what typical attack-versus-defense comparisons look like. These numbers are excellent for sanity-checking setups.
| Attack Rating | Defense Rating | Estimated Hit Chance | Interpretation |
|---|---|---|---|
| 2000 | 2000 | 50.0% | Evenly matched offense and defense |
| 2200 | 1800 | 55.0% | Noticeable offensive advantage |
| 2500 | 2350 | 51.5% | Slight edge, but not overwhelming |
| 2800 | 2200 | 56.0% | Strong practical pressure |
| 2100 | 2600 | 44.7% | Defense is likely to feel significant |
Step-by-Step Example
Imagine your weapon uses 67% Primary Skill and 33% Secondary Skill. You have the following stats:
- Primary skill: 2200
- Secondary skill: 1800
- Tertiary skill: 0
- Add All Offense: 300
- Target evade skill: 2100
- Target Add All Def: 250
First, compute the weighted attack skill:
(2200 × 67 + 1800 × 33) ÷ 100 = (147400 + 59400) ÷ 100 = 2068
Next, add Add All Offense:
2068 + 300 = 2368 effective attack rating
Then compute target defense:
2100 + 250 = 2350 defense rating
Finally, estimate hit chance:
2368 ÷ (2368 + 2350) = 2368 ÷ 4718 = 50.19%
That tells you the matchup is almost perfectly even. If you add 100 more Add All Offense, your attack rating rises to 2468 and your estimated hit chance becomes 51.23%. If instead you can increase the secondary attack skill by 150, the weighted gain is only 49.5 attack before Add All Offense in a 67/33 split. This is the kind of insight that helps players choose between broad offensive gear and narrow single-skill improvements.
Important Nuances Players Should Remember
1. Not Every Item Uses the Same Attack Template
Always inspect the item or trusted database entry. A weapon that appears similar to another may use a very different attack skill split. If you assume 100% of a main weapon skill when the real template is mixed, your calculated attack rating will be inflated and your performance expectations will be off.
2. Specials, Perks, and Procs Can Use Different Logic
Normal attacks, specials, perks, and nanos do not always follow the same formula. Some perks check attack skill against a specific defensive skill with their own percentages. Some special actions are easier or harder to land because they use unique checks. The calculator on this page is best used for conventional attack-rating planning and matchup comparison rather than every specialized game mechanic.
3. Attack Rating and Damage Are Related but Not Identical
Players sometimes say “my attack is higher” when they really mean “my damage went up.” These are connected, but they are not the same. A higher attack rating can improve your chance to hit and often influences damage performance, but weapon minimum damage, armor class interactions, criticals, add damage, and profession-specific scaling all matter. Do not assume that a modest gain in attack rating automatically creates a huge damage gain in every situation.
4. Defensive Setup Value Is Often Underestimated
From the defender’s perspective, Add All Def can be incredibly efficient. If an opponent is only slightly ahead of your defense, a reasonable increase in Add All Def can bring the matchup close to parity. That can reduce incoming consistency enough to materially change duels, tower encounters, and difficult PvM fights.
How to Use This Calculator Effectively
- Start by selecting the weapon template that most closely matches your item.
- Enter your real skill values, not just buffed estimates you cannot sustain.
- Add your current Add All Offense from gear, research, perks, and temporary buffs.
- Enter the target’s likely evade skill and Add All Def.
- Calculate once for your current setup, then again for a proposed gear swap.
- Watch the chart to see how your hit chance changes across a range of target defenses.
This comparison workflow is especially useful when deciding between offensive and defensive armor, swapping implants versus symbiants, or choosing which skill line to prioritize with limited IP and equipment slots. If your secondary skill is part of the attack template, raising it may be more valuable than many players initially expect. If your weapon is pure 100% main skill, then Add All Offense often becomes the cleanest universal offensive stat to compare across setups.
Common Mistakes When Calculating Attack in Anarchy Online
- Using only the primary weapon skill and ignoring the weapon’s split percentages.
- Forgetting to add Add All Offense after the weighted skill calculation.
- Comparing attack rating directly to raw evade without including Add All Def.
- Assuming every perk and special uses the same attack-defense formula as normal attacks.
- Confusing better hit chance with guaranteed better total damage in all content.
Probability, Weighted Averages, and Why They Matter Here
The math behind attack estimation relies on two simple ideas: weighted averages and probability ratios. Weighted averages are what make a 67/33 or 80/20 weapon different from a pure 100% weapon. Probability ratios are what help explain why adding 100 attack is more noticeable in a close matchup than in a lopsided one. If you want a deeper foundation for the mathematical thinking behind these estimates, the resources below are strong references on probability and statistical interpretation:
- NIST/SEMATECH e-Handbook of Statistical Methods
- Penn State STAT 414: Probability Theory
- UC Berkeley Department of Statistics
Final Takeaway
If you want the shortest trustworthy answer to “anarchy online how is attack calculated,” it is this: determine the weapon’s attack-skill percentages, compute the weighted average of those skills, add Add All Offense, and then compare the final result against the target’s relevant defensive skill plus Add All Def. That framework will not solve every edge case in the game, but it is the right foundation for understanding attack rating, evaluating gear, and building smarter PvM and PvP setups.
Use the calculator above whenever you are considering a new weapon, an implant change, a research adjustment, or an offensive versus defensive equipment swap. In a game as stat-dense as Anarchy Online, the players who calculate carefully almost always make better build decisions than the players who guess.