diff --git a/core/src/Equipment.cpp b/core/src/Equipment.cpp
index 3dfe21b..a75a302 100644
--- a/core/src/Equipment.cpp
+++ b/core/src/Equipment.cpp
@@ -151,3 +151,162 @@ const char* attributeName(AttributeModifier::Attribute attribute) {
     return "unknown";
 }
 
+float weaponAttackDamage(ItemId item) {
+    if (!isTool(item)) return unarmedAttackDamage;
+    const ItemInfo& info = itemInfo(item);
+    switch (info.toolType) {
+        case ToolType::Sword:   return swordDamage(info.toolTier);
+        case ToolType::Axe:     return axeDamage(info.toolTier);
+        case ToolType::Pickaxe: return pickaxeDamage(info.toolTier);
+        case ToolType::Shovel:  return pickaxeDamage(info.toolTier) + 0.5f;
+        case ToolType::Hoe:     return unarmedAttackDamage;
+        case ToolType::None:    break;
+    }
+    return unarmedAttackDamage;
+}
+
+float weaponAttackSpeed(ItemId item) {
+    if (!isTool(item)) return unarmedAttackSpeed;
+    const ItemInfo& info = itemInfo(item);
+    switch (info.toolType) {
+        case ToolType::Sword:   return 1.6f;
+        case ToolType::Axe:     return axeSpeed(info.toolTier);
+        case ToolType::Pickaxe: return 1.2f;
+        case ToolType::Shovel:  return 1.0f;
+        case ToolType::Hoe:     return hoeSpeed(info.toolTier);
+        case ToolType::None:    break;
+    }
+    return unarmedAttackSpeed;
+}
+
+float weaponAttackReach(ItemId item) {
+    if (!isTool(item)) return unarmedAttackReach;
+    switch (itemInfo(item).toolType) {
+        case ToolType::Sword: return unarmedAttackReach + 0.5f;
+        case ToolType::Axe:
+        case ToolType::Hoe:   return unarmedAttackReach + 0.25f;
+        case ToolType::Pickaxe:
+        case ToolType::Shovel:
+        case ToolType::None:  break;
+    }
+    return unarmedAttackReach;
+}
+
+float armorWeightPenalty(int armorPoints) {
+    if (armorPoints <= 0) return 0.0f;
+    float penalty = 0.01f * static_cast<float>(armorPoints);
+    return penalty > 0.35f ? 0.35f : penalty;
+}
+
+void EquipmentStats::applyTo(CombatStats& stats) const {
+    stats.armor = armor;
+    stats.baseAttackDamage = attackDamage;
+    stats.attackSpeed = attackSpeed;
+}
+
+bool Equipment::accepts(EquipSlot slot, const MetaStack& stack) const {
+    if (stack.empty()) return false;
+    if (!isHandSlot(slot)) return false;
+    return true;
+}
+
+bool Equipment::equip(EquipSlot slot, const MetaStack& stack) {
+    if (!accepts(slot, stack)) return false;
+    hands[static_cast<std::size_t>(handIndex(slot))] = stack;
+    return true;
+}
+
+bool Equipment::equipArmor(const Armor& piece) {
+    return equipArmorAt(equipSlotFor(piece.slot), piece);
+}
+
+bool Equipment::equipArmorAt(EquipSlot slot, const Armor& piece) {
+    if (!isArmorSlot(slot)) return false;
+    if (piece.material == Armor::Material::None) return false;
+    if (armorSlotFor(slot) != piece.slot) return false;
+    worn.at(piece.slot) = piece;
+    return true;
+}
+
+MetaStack Equipment::unequip(EquipSlot slot) {
+    if (!isHandSlot(slot)) return MetaStack{};
+    MetaStack removed = hands[static_cast<std::size_t>(handIndex(slot))];
+    hands[static_cast<std::size_t>(handIndex(slot))].clear();
+    return removed;
+}
+
+Armor Equipment::unequipArmor(EquipSlot slot) {
+    if (!isArmorSlot(slot)) return Armor{};
+    Armor& piece = worn.at(armorSlotFor(slot));
+    Armor removed = piece;
+    piece = Armor{};
+    return removed;
+}
+
+const MetaStack& Equipment::hand(EquipSlot slot) const {
+    if (!isHandSlot(slot)) return noStack();
+    return hands[static_cast<std::size_t>(handIndex(slot))];
+}
+
+const Armor& Equipment::armorPiece(EquipSlot slot) const {
+    Armor::Slot mapped = armorSlotFor(slot);
+    if (mapped == Armor::Slot::Count) return noArmor();
+    return worn.at(mapped);
+}
+
+EquipmentStats Equipment::stats() const {
+    EquipmentStats stats;
+    stats.armor = worn;
+    stats.armorPoints = worn.totalPoints();
+    stats.armorToughness = worn.totalToughness();
+
+    for (int i = 0; i < static_cast<int>(Armor::Slot::Count); ++i) {
+        Armor::Slot armorSlot = static_cast<Armor::Slot>(i);
+        const Armor& piece = worn.at(armorSlot);
+        if (!piece.worn()) continue;
+        EquipSlot slot = equipSlotFor(armorSlot);
+        addModifier(stats, AttributeModifier::Attribute::ArmorPoints,
+                    AttributeModifier::Operation::Add, static_cast<float>(armorPoints(piece)), slot);
+        addModifier(stats, AttributeModifier::Attribute::ArmorToughness,
+                    AttributeModifier::Operation::Add, armorToughness(piece), slot);
+    }
+
+    float weight = armorWeightPenalty(stats.armorPoints);
+    stats.movementSpeed = 1.0f - weight;
+    addModifier(stats, AttributeModifier::Attribute::MovementSpeed,
+                AttributeModifier::Operation::MultiplyTotal, -weight, EquipSlot::Chest);
+
+    const MetaStack& weapon = hands[0];
+    if (!weapon.empty()) {
+        stats.weaponEnchants = weapon.meta.enchants;
+        stats.attackDamage = weaponAttackDamage(weapon.item);
+        stats.attackSpeed = weaponAttackSpeed(weapon.item);
+        stats.attackReach = weaponAttackReach(weapon.item);
+        stats.miningSpeed = toolTierSpeedMultiplier(itemInfo(weapon.item).toolTier);
+
+        int efficiency = weapon.meta.enchants.levelOf(EnchantKind::Efficiency);
+        if (efficiency > 0) {
+            float bonus = static_cast<float>(efficiency * efficiency + 1);
+            stats.miningSpeed += bonus;
+            addModifier(stats, AttributeModifier::Attribute::MiningSpeed,
+                        AttributeModifier::Operation::Add, bonus, EquipSlot::MainHand);
+        }
+
+        addModifier(stats, AttributeModifier::Attribute::AttackDamage,
+                    AttributeModifier::Operation::Add, stats.attackDamage - unarmedAttackDamage,
+                    EquipSlot::MainHand);
+        addModifier(stats, AttributeModifier::Attribute::AttackSpeed,
+                    AttributeModifier::Operation::Add, stats.attackSpeed - unarmedAttackSpeed,
+                    EquipSlot::MainHand);
+        addModifier(stats, AttributeModifier::Attribute::AttackReach,
+                    AttributeModifier::Operation::Add, stats.attackReach - unarmedAttackReach,
+                    EquipSlot::MainHand);
+        addModifier(stats, AttributeModifier::Attribute::MiningSpeed,
+                    AttributeModifier::Operation::Add,
+                    toolTierSpeedMultiplier(itemInfo(weapon.item).toolTier) - 1.0f,
+                    EquipSlot::MainHand);
+    }
+
+    return stats;
+}
+