Crafting Tool
PoE Imbued Gem Calculator
Calculate Gemcutter's Prism costs for quality upgrades and estimate gem leveling experience requirements.
GCP Quality Calculator
Gem Leveling XP Calculator
| Level | Cumulative XP | XP to Next |
|---|---|---|
| 1 | 0 | 70 |
| 2 | 70 | 238 |
| 3 | 308 | 619 |
| 4 | 927 | 1,353 |
| 5 | 2,280 | 2,628 |
| 6 | 4,908 | 4,682 |
| 7 | 9,590 | 7,974 |
| 8 | 17,564 | 12,972 |
| 9 | 30,536 | 20,476 |
| 10 | 51,012 | 31,734 |
| 11 | 82,746 | 48,622 |
| 12 | 131,368 | 73,680 |
| 13 | 205,048 | 110,816 |
| 14 | 315,864 | 165,620 |
| 15 | 481,484 | 246,412 |
| 16 | 727,896 | 367,008 |
| 17 | 1,094,904 | 544,344 |
| 18 | 1,639,248 | 808,200 |
| 19 | 2,447,448 | 1,197,300 |
| 20 | 3,644,748 | 65,235,252 |
Common Quality Effects
| Gem Type | Quality Bonus | Per 1% |
|---|---|---|
| Attack Gem | increased Attack Speed | 0.5% |
| Spell Gem | increased Cast Speed | 0.5% |
| Aura Gem | increased Area of Effect | 1% |
| Support Gem | varies by gem | varies |
| Vaal Gem | increased Soul gain | 1% |
Quality effects vary per gem. Check each gem's tooltip for its specific quality bonus. At 20% quality, most attack gems gain 10% increased attack speed, and most spell gems gain 10% increased cast speed.
Understanding Gem Quality in Path of Exile
In Path of Exile, every skill and support gem can have up to 20% quality (or 23% with certain crafting methods). Quality adds a bonus effect that varies by gem — it might increase damage, area of effect, attack speed, or other modifiers. Each Gemcutter's Prism (GCP) adds 1% quality to a gem, making GCPs a valuable and sometimes expensive currency.
This calculator helps you plan your GCP spending by showing the exact cost to reach your target quality from any starting point. It also estimates experience requirements for gem leveling, so you can plan your gem progression efficiently.
Gem Quality Methods
- •Gemcutter's Prism (GCP) — adds 1% quality per use, up to 20%. Most straightforward method.
- •Quality vendor recipe — sell a gem with 20% quality to a vendor to receive 1 GCP back. Sell gems totaling 40%+ quality for a GCP.
- •Hillock bench (Betrayal) — Hillock in Transportation safehouse can quality gems to 26% (or 28/30% at higher ranks).
- •Lens currency — Prime/Secondary/Anomalous Lenses modify gem quality type (Divergent, Anomalous, Phantasmal).
GCP Cost Optimization Tips
Using GCPs on a level 1 gem is the most cost-effective approach because you only need the quality you want minus the gem's existing quality. A common strategy is to buy gems with some quality already on them from other players, reducing your GCP costs. The vendor recipe (selling gems totaling 40% quality for 1 GCP) is also useful for converting low-value quality gems into currency.
For builds that require multiple 20% quality gems, planning your GCP budget is essential. This calculator shows the total cost at a glance, helping you prioritize which gems benefit most from quality upgrades. Need to color your sockets too? Try our PoE Color Calculator.
Gem Experience Requirements
Gems in Path of Exile level up as you earn experience. Each gem level requires progressively more experience, with level 20 gems requiring roughly 340 million total XP. The experience your gems receive is a percentage of the experience you earn, split among all equipped gems. Planning your leveling route and knowing how much XP remains can help you optimize your gem progression.