No Chestplate
1 Charge - 3 Hearts of damage
3 Charge - 5 Hearts of damage
5 Charge - 7 Hearts of damage
7 Charge - 9 Hearts of damage

Netherite Chestplate (Unenchanted)
1 Charge - 2 Hearts of damage
3 Charge - 3 Hearts of damage
5 Charge - 4.5 Hearts of damage
7 Charge - 6 Hearts of damege

Netherite Chestplate (Blast Prot 2)
1 Charge - 2 Hearts of damage
3 Charge - 3 Hearts of damage
5 Charge - 4.5 Hearts of damage
7 Charge - 5.5 Hearts of damage

Netherite Chestplate (Blast Prot 4)
1 Charge - 2 Hearts of damage
3 Charge - 3 Hearts of damage
5 Charge - 4.5 Hearts of damage
7 Charge - 5.5 Hearts of damage

FULL Netherite Armor (All Unenchanted)
1 Charge - 0.5 Hearts of damage
3 Charge - 1 Heart of damage
5 Charge - 1 Heart of damage
7 Charge - 1.5 Hearts of damage

FULL Netherite Armor (All with Blast Prot 4)
1 Charge - 0.5 Hearts of damage
3 Charge - 1 Heart of damage
5 Charge - 1 Heart of damage
7 Charge - 1.5 Hearts of damage