OSRS Agility Boost Calculator: Plan Your Next Run

This calculator works out your effective Agility level in Old School RuneScape after applying any combination of potions, prayers, and other boosts. You enter your base Agility level and select the boosts you are using, and it returns your boosted level, which is what determines success rates on obstacles and access to shortcuts.

Formula

The calculation is simple addition: Boosted Agility level = Base Agility level + Agility potion bonus + Prayer bonus. Each variable is defined as:

• Base Agility level – your unboosted Agility level, from 1 to 99 (or higher if you have a cape or other permanent boost).
• Agility potion bonus – the level boost from the potion or food you are using. Summer pie gives +5, agile top and bottom give +6, and Agility potions give +3 regardless of dose.
• Prayer bonus – the boost from the Preserve prayer, which keeps your current boosted level from draining for a short time. It does not add levels directly but is included here as a placeholder for the effect of preserving the boost.

Note that the Preserve prayer does not increase your level; it only slows the drain of the boost. The calculator treats it as a 0 addition, which is correct for the level itself.

Worked Example

Using the default values: base Agility 70, no potion, no prayer.

1. Start with base level: 70
2. Add potion bonus: 70 + 0 = 70
3. Add prayer bonus: 70 + 0 = 70

The calculator returns 70 as the boosted level, which matches the formula.

How Boosts Work in OSRS

In Old School RuneScape, Agility boosts are temporary increases to your Agility level, usually from consumables or equipment. They allow you to pass obstacles and shortcuts that require a higher level than your base. The most common boosts are:

• Summer pie – gives +5 Agility, and also restores run energy. It is the most popular boost for reaching shortcuts.
• Agility potion – gives +3 Agility, available in doses of 1 to 4, but the boost is the same regardless of dose.
• Agile top and bottom – when worn together, they give a +6 invisible boost to Agility, but this only applies while you are wearing them and does not show in your stats interface.
• Spicy stew – can boost or lower any skill by up to +5, depending on the spices used. It is random and not commonly used for Agility.

Prayers like Preserve do not add levels but slow the drain of your boosted level, which is useful for long courses.

How to Choose the Right Boost

Choosing a boost depends on what you need it for:

• If you need a +5 boost for a shortcut, use a summer pie. It is cheap and also restores run energy.
• If you need a +3 boost and have no pies, use an Agility potion. It is less effective but easier to make.
• If you are training and want a passive boost, wear Agile top and bottom for +6, but note this does not help with shortcuts that require a specific level because it is invisible and does not count for quest requirements.
• If you want to keep your boost for a long time, use the Preserve prayer, but it requires 55 Prayer and drains prayer points.

Common Mistakes and Misconceptions

A frequent mistake is assuming that the Agile top and bottom boost counts toward quest or achievement diary level requirements. It does not – those checks use your visible level, so you need a real boost like a pie or potion. Another misconception is that the Preserve prayer adds levels; it only slows the drain. Also, remember that boosts cannot exceed level 99 for most purposes, but some content (like the Agility Pyramid) may use the boosted level for success rates.

Comparing Boost Options

Here is a quick comparison of the main boost sources:

• Summer pie: +5, easy to obtain from cooking, also restores run energy, but requires 95 Cooking to make.
• Agility potion: +3, made with a toadflax and a white berry, requires 34 Herblore.
• Agile top and bottom: +6 invisible, requires 55 Agility to wear, and gives a set bonus.
• Spicy stew: +0 to +5 random, requires a stew and spices, unreliable.

Costs and Availability

Summer pies are often bought from other players or made with cooking. Agility potions are cheap to make or buy. Agile top and bottom are rewards from the Agility Arena (Brimhaven) and require tickets. Spicy stews are made with a stew and spices from the Evil Dave’s basement quest. Prices vary, but generally summer pies are the most cost-effective for a +5 boost.

Frequently Asked Questions

Does the Agile top and bottom boost show in my stats?

No, the +6 boost is invisible. It only applies while you are wearing both pieces and does not display in your stats menu, but it does affect your success rate on obstacles.

Can I use a boost to enter the Rogues’ Den?

No, the Rogues’ Den requires a base Agility level of 50. Boosts do not work for entering the minigame; you need the actual level.

Does the Preserve prayer work with all boosts?

Yes, Preserve works with any stat boost, including Agility from pies or potions. It slows the drain of the boosted level, but it does not prevent drain entirely.

What is the maximum boosted Agility level?

With the Agile set bonus (+6) and a summer pie (+5), you could reach a theoretical maximum of 110 if you have 99 base. However, most content caps at 99, and the invisible boost may not apply to all checks.

Do boosts help with the Agility Pyramid?

Yes, boosts increase your success rate on obstacles in the Agility Pyramid, but they do not affect the reward you get. Higher levels give more experience per obstacle.

Is it worth using a boost for rooftop courses?

Boosts can help you pass obstacles you would otherwise fail, but they do not increase experience rates significantly. They are more useful for shortcuts and quest requirements.

Related

• Edmund Optics SAG Calculator: How to Use It
• Edmund Optics FOV Calculator: How to Use It
• Calculator Topics GCSE Maths: Full List

in lvl | Base Agility level | - | 70 | 1
sel pot | Agility potion | None=0, Summer pie=5, Agile top and bottom=6, Agility potion(4)=3, Agility potion(3)=3, Agility potion(2)=3, Agility potion(1)=3
sel pray | Prayer boost | None=0, Summer heat=0, Preserve=0
out boosted | Boosted Agility level | - | lvl + pot + pray | 0