Comparison

Diamond Axe vs Iron Axe

Minecraft 1.21.8. Java Edition values.

Verdict

Same attack damage (9), but Diamond's attack speed is 1.0 vs Iron's 0.9 — 11% more DPS. Diamond also has 6× the durability. The DPS bump is real for PvP and bosses; for chopping trees it's invisible.

Side-by-side stats

Highlighted cell wins that row.

StatDiamond AxeIron Axe
Attack damage99
Attack speed1/s0.9/s
DPS98.1
Durability1,561250
Mining speed multiplier8×6×
Enchantability1014
Mining tierDiamondIron
Survives lava (as dropped item)NoNo
Crafted fromDiamondIron Ingot

When to pick each

Pick Diamond when…

Combat axes for PvP or boss fights, or you're upgrading to Netherite later via the Smithing Table (axe + ingot + template).

Pick Iron when…

Pure tree-chopping. Iron's attack speed isn't relevant when felling spruces, and 250 durability with Unbreaking III is plenty for casual woodcutting.

Get these tools

Diamond Axe
Iron Axe

Other tool comparisons

FAQ

Is the Diamond Axe better than the Iron Axe?
Same attack damage (9), but Diamond's attack speed is 1.0 vs Iron's 0.9 — 11% more DPS. Diamond also has 6× the durability. The DPS bump is real for PvP and bosses; for chopping trees it's invisible.
How much damage does a Diamond Axe do?
9 attack damage with 1.0 attacks per second — 9 DPS at full charge. Same damage as a Iron Axe.
What's the durability of a Diamond Axe?
1,561 uses before it breaks. That's 1,311 more than a Iron Axe (250 uses). Unbreaking III roughly multiplies durability by 4.
Should I upgrade from Iron Axe to Diamond Axe?
Combat axes for PvP or boss fights, or you're upgrading to Netherite later via the Smithing Table (axe + ingot + template). If those don't apply, pure tree-chopping. iron's attack speed isn't relevant when felling spruces, and 250 durability with unbreaking iii is plenty for casual woodcutting.