For most recoil moves, the amount of recoil damage is proportional to the damage dealt (the exact proportion varying between moves);
For example, wood hammer's recoil is always damage / 3. If it deals 240, 241, or 242 damage, then your recoil is 80 damage. 241 to 320 HP lets you use 4 wood hammers, 321 to 400 HP lets you use 5 wood hammers, etc. I'm pretty sure the only exceptions are struggle, mind blown, and steel beam.