Hit Points
Hit Points
Hit Points (HP) is the survival pool that measures how much damage a character can absorb before dying. When a character's Hit Points reach zero, the character dies and becomes a ghost. Hit Points are the single most fundamental defensive resource in Ultima Online — every form of damage, every monster swing, every spell, every poison tick draws from this pool. The pool is continuously regenerated at a passive rate (boostable by the Hit Point Regeneration item property and a handful of spell effects), and the maximum size of the pool is governed by a character's Strength (statistic) plus the Hit Point Increase item property bonus (capped at +25 from gear). Hit Points are restored through regeneration, bandages (Healing/Veterinary), spells (Greater Heal, Cure, Close Wounds), potions (Greater Heal Potion), and food (slow trickle).
Max Hit Points formula
The modern (post-AoS) formula for maximum Hit Points is:
| Component | Contribution |
|---|---|
| Base | Strength value, 1-for-1 (100 STR = 100 base HP) |
| Hit Point Increase (HPI) | +1 to +25 from equipped items |
| Strength Bonus | from items, potions, spells (raises STR, which raises HP) |
| Maximum HP | Strength + HPI (with HPI capped at +25 cumulative from gear) |
A 100-STR character with +25 HPI worth of gear has 125 max HP. The 25-point HPI cap was set in Publish 46; before that, players could stack arbitrary amounts.
Legacy note — the pre-AoS / T2A-era formula was (STR / 2) + 50, giving a 100-STR character only 100 HP via a different curve. The current 1-for-1 STR-to-HP relationship has been canonical since AoS (2003).
Hit Point Increase (HPI) — item property
Hit Point Increase is a magic-item property that adds to the wearer's maximum Hit Points ceiling. Key mechanics:
| Mechanic | Detail |
|---|---|
| Cap (Pub 46) | +25 HP total from all equipped items combined |
| Per-item armor max | 1–5 HPI per crafted/looted armor piece |
| Activation | Effect is granted immediately on equip — but the new HP is not instantly added; the character must regenerate or heal up to the new maximum |
| Server crossing | HP briefly drops because equipment is "refreshed" on shard / Felucca↔Trammel hop |
| Imbuing max | +5 HPI per imbued slot (10 Enchanted Essence + 10 Rubies + 10 Luminescent Fungi) |
Notable HPI items
| Item | HPI |
|---|---|
| Orc Chieftain Helm | +30 (the highest single-item HPI, but the +25 cap means it counts as 25 once equipped) |
| Reading Glasses of the Arts | +15 |
| Knight's Armor Set | +12 (set bonus, total) |
| Crimson Cincture (half apron) | +10 |
| Holy Knight's Breastplate | +10 |
| Blade of the Righteous | +10 |
| Fey Leggings | +6 |
| Anthropomorphist Reading Glasses | +5 |
| Bracelet of Health | +5 |
| Dupre's Shield | +5 |
| Reading Glasses (Treasures and Trinkets) | +5 |
| Guardian Axe | +4 |
| Warrior Armor Set pieces | +2 each |
| Studded Armor of the Britannia Royal Zoo | +2 each |
A typical suit-builder spreads HPI across 3–6 pieces to hit the +25 cap while reserving slots for other mods (LRC, MR, DCI, resists). Bracelet of Health + Crimson Cincture + Holy Knight's Breastplate alone reaches the cap.
Hit Point Regeneration (HPR) — item property
Hit Point Regeneration describes the amount of HP a character regains continuously every 10 seconds. The base passive rate is small (1–2 HPR for most characters); HPR-bearing items and spell effects boost this dramatically.
| Mechanic | Detail |
|---|---|
| Cap | 18 HPR maximum useable rate (extra HPR beyond 18 has no effect) |
| Tick rate | Every 10 seconds, the regen pool grants the HPR amount |
| Imbuing max | +2 HPR per imbued slot (5 Enchanted Essence + 10 Tourmaline + 10 Seed of Renewal) |
| Enhancing | Bloodwood is the highest-intensity wood-enhanceable HPR (+2 on wooden armor / shield / weapon) |
HPR caps by item slot
| Item slot | Max HPR found |
|---|---|
| Armor parts | 4 |
| Shields | 4 |
| Ranged weapons | 9 |
| Bracelets | 10 (Bracelet of Health, Bracelet of Protection) |
| Rings | 5 (Crystalline Ring) |
A maxed HPR suit blends a Bracelet of Health (10), a +5 ring (Crystalline), and ~2 HPR per imbued armor slot to comfortably hit the 18-HPR cap.
HPR from spell effects
| Source | HPR contribution |
|---|---|
| Necromancy — Horrific Beast | +20 HPR (over-caps the 18 ceiling — full cap regen) |
| Necromancy — Lich Form | −5 HPR (negative — Lich Form trades regen for spell power) |
| Ninjitsu — Animal Form (Dog or Cat) | varies by Ninjitsu skill (~15 → far above the cap) |
| Spellweaving — Gift of Renewal | 9–14 HP every 2 seconds (specialty: targeted regen burst) |
| Bard Mastery — Peacemaking — Resilience | 2–22 HPR to the entire party |
Horrific Beast is the single most dramatic HPR boost in the game — it forces the regen rate to its cap (18) regardless of other gear. Lich Form's −5 HPR is the price of the form's spell-damage and life-leech bonuses.
Hit Point Bonus (legacy item property)
The Hit Point Bonus property — older terminology — is functionally the same as Hit Point Increase. Modern AoS-era items use "Hit Point Increase"; pre-AoS magical-item legacy text occasionally still reads "Hit Point Bonus." Treat them as identical for stacking and the +25 cap.
Restoring Hit Points
Beyond passive regen, HP is restored by:
| Source | Mechanic |
|---|---|
| Healing bandages | Self-cycle 8 − (DEX − 80) / 20 seconds; (Anat + Heal) / 6 + 3 to (Anat / 6 + Heal / 3 + 10) HP per bandage |
| Veterinary bandages | 2-second cycle on pets, identical Anat-scaling formula |
| Magery — Heal | First-circle, ~3–17 HP single-target (scales with Magery + Eval Int) |
| Magery — Greater Heal | Fourth-circle, ~12–22 HP (with cap on overheal) |
| Chivalry — Close Wounds | Karma-scaling heal |
| Greater Heal Potion | Instant ~25 HP (consumed from belt slot) |
| Fountain of Life Enhanced Bandages | +5 HP and faster cycle on pre-charged bandages |
| Food | Slow trickle while satisfying Hunger; tied to Hunger system not active healing |
Critical thresholds
UO uses HP percentages, not absolute values, for several gameplay-critical thresholds:
| Threshold | Trigger |
|---|---|
| Spellcasting interrupt — PC vs PC | 19+ damage in a single packet causes spell-cast interruption |
| Spellcasting interrupt — monster | 26+ damage in a single packet causes spell-cast interruption |
| Bandage cure (60% rule) | At 60% HP or below, bandage poison-cure is more reliable |
| Bandage rez threshold (80% rule) | An 80-Healing / 80-Anatomy bandage can rez a fresh ghost corpse (but skill formula has variance) |
| Veterinary rez | 80 / 80 bonded-pet rez (8s window) |
The 19/26 interrupt rule is one of the most-cited combat numbers in PvP design.
Pet Hit Points
Pet Training gates pets into HP brackets via the Magical Mastery system. Hit Point Increase as a pet ability comes from the Magic Stat Caps Power Scroll tree (Pub 97 system). Pet HP scales with strength just like player HP, with bond-tier-specific HPR bonuses.
Display
The Hit Point bar appears on:
| Surface | Detail |
|---|---|
| Status bar (own char) | Numeric current/max + bar; updates in real-time |
| Health bar over creature | Color-coded (green / yellow / red) percentage indicator |
| Party bar | Per-party-member current/max via Party feature |
| Custom layout | Status bar can be detached and resized via paperdoll → Options → Game Play → Status Bar |
See also
- Strength (statistic) — the primary determinant of max HP
- Statistics — the stat-triad overview (STR / DEX / INT) and the 260-cap
- Healing · Veterinary — the bandage skills
- Magery — Heal / Greater Heal / Cure spells
- Chivalry — Close Wounds / Remove Curse
- Item Properties — full magic-item property reference
- Imbuing — the +5 HPI / +2 HPR imbue intensities
- Pet Training — pet HP bracket system
- Mana · Stamina — the other two derived attribute pools