osu! Hard Rock PP Calculator

Hard Rock (HR) is one of the three core PP-boosting mods in osu!, offering a 1.10× PP multiplier. Unlike Double Time, which changes speed, Hard Rock increases the map's intrinsic difficulty: hit circles become smaller, approach rate increases, timing windows tighten, and the entire map is flipped vertically. These changes demand significantly higher precision from every click.

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What Hard Rock Actually Changes

Hard Rock applies several simultaneous modifications to a beatmap:

Circle Size (CS) +1.3× — circles become noticeably smaller, requiring more precise cursor positioning
Approach Rate (AR) increases — circles appear for less time before you must click them, reducing reaction time
Overall Difficulty (OD) +1.4× — timing windows shrink, making anything other than a perfect 300 harder to achieve
HP Drain +1.4× — your health bar drops faster, punishing misses more severely
Vertical map flip — the entire map is mirrored on the Y axis, which is particularly disorienting for players who have memorized maps right-side-up

The net effect is a map that tests aim precision and accuracy simultaneously. Many players find HR harder than DT at equivalent star ratings because DT's challenge is primarily speed, while HR demands surgical accuracy at all times.

HR PP Reference Values

Star Rating	Accuracy	PP (approx)	vs No Mod
3★	97%	44pp	+6pp
4★	96%	122pp	+47pp
5★	95%	222pp	+79pp
6★	93%	375pp	+110pp
7★	91%	580pp	+120pp

Hard Rock's PP advantage over No Mod is more pronounced at higher star ratings because OD and CS scaling creates larger performance differentials at the top end.

How to Approach Hard Rock

HR rewards players with excellent aim control and natural accuracy. If you frequently achieve 98%+ on No Mod maps, HR will feel more accessible than if you typically play at 94–95%. Here is a structured learning path:

Master the map No Mod first. Unlike Hidden, HR drastically changes how maps feel. Learning a map with HR from scratch is inefficient — know the No Mod version well first.
Start 1–1.5 stars below your NM level. The CS and AR increases make HR feel significantly harder than the star rating suggests.
Do not ignore the vertical flip. Muscle memory from No Mod play will work against you on HR. Treat HR plays like learning the map from scratch, especially for jump sections.
Prioritize accuracy over combos. The OD increase means missed 300s become 100s that hurt your accuracy PP significantly. Aim for clean hits rather than sustaining a risky combo.

Hard Rock synergizes particularly well with players who have high natural accuracy. If you often achieve 98–100% No Mod, your accuracy PP component will be significantly higher under HR than the multiplier alone suggests.

HR vs DT — Which Gives More PP?

DT gives a higher raw multiplier (1.12× vs HR's 1.10×), but HR's actual PP advantage in practice depends on your play style. DT is generally better for aim-focused players who can maintain speed, while HR favors accuracy-focused players. Most top players eventually master both, since HRDT (1.232×) is one of the strongest combinations in the game.

Frequently Asked Questions

Does Hard Rock change the actual star rating of maps?

Yes. HR increases CS (making aim patterns harder) and AR (giving less time to read), both of which increase the effective difficulty. The displayed star rating in map selection does not update dynamically, but the PP calculation internally accounts for the HR-modified OD, CS, and AR values.

Why does the map flip vertically with Hard Rock?

The vertical flip is an intentional difficulty increase that was part of the original osu! Hard Rock design. It disrupts spatial memory for maps you know well, effectively making even familiar maps feel unfamiliar. Over time, most HR players adapt and stop noticing the flip on maps they practice regularly.

Is HR+DT worth learning?

HRDT (Hard Rock + Double Time) gives a 1.232× multiplier, which is higher than HDDT (1.187×). However, HRDT is significantly harder to execute because it combines smaller circles, faster speed, and tighter timing windows simultaneously. It is typically the domain of players in the top 10,000.

🎮 Other Mod Calculators

Hidden (HD)

1.06× multiplier · Medium

Double Time (DT)

1.12× multiplier · Hard

No Mod (NM)

1× multiplier · Baseline

Hidden + Double Time (HDDT)

1.1872× multiplier · Very Hard

Flashlight (FL)

1.12× multiplier · Extreme

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