The Minecraft Fall Damage Formula, Explained

Verified: Java 26.3 / Bedrock 26.50 · 2026-09-16 · Updated 2026-09-16

Fall damage is the most linear system in the game — a straight line with a three-block head start — and yet the numbers around it (48 percent, 80 percent, 23 blocks, 102 blocks) get repeated more often than derived. This guide derives them, so the fall damage calculator's answers are checkable by hand.

The line itself

The base rule: one damage point — half a heart — per block fallen beyond the third. Three blocks or less is free; a four-block drop costs half a heart; a ten-block drop costs 10 − 3 = 7 points, three and a half hearts. A player carries 20 points of health, so the unenchanted lethal line from full health sits where blocks − 3 = 20: a 23-block fall is exactly fatal, and a 22-block fall leaves you standing on half a heart. Those two heights are the anchor facts of the whole system, and both are asserted in our test suite.

The protection family

Enchantment reductions run through one shared system. Feather Falling removes 12 percent of fall damage per level — 48 percent at IV, the wiki's own stated figure — and Protection removes 4 percent per level per armor piece, 64 percent for a full Protection IV set. The family's combined reduction is capped at 80 percent, which Feather Falling IV cannot reach alone: it takes the boots plus at least eight Protection levels elsewhere to saturate the cap. Past that point, more Protection buys nothing against falls.

What the cap is worth: at 80 percent, each block beyond the grace costs a fifth of a point, so the lethal line moves from 23 blocks to 103 — the calculator reports 102 as the last survivable height. The same jump repeats every time the multiplier shrinks, which is the pattern worth internalizing: divide the damage, multiply the ceiling.

The landing matters as much as the gear

Water cancels fall damage outright, and a slime-block bounce prevents it as well (the sneak-related slime edge cases are documented inconsistently across sources, so the calculator scopes them out rather than guessing). Hay bales and honey blocks keep only 20 percent of the damage — numerically the same factor as the enchantment cap, which produces a neat coincidence: an unenchanted player landing on hay and a fully capped player landing on stone both top out at 102 blocks. Stack the two and the factors multiply: 20 percent of 20 percent is 4 percent, a ceiling of 502 blocks. All four ceilings — 22, 41 for Feather Falling IV alone, 102, 502 — are computed, not quoted, and pinned by tests.

A worked example

The calculator's default scenario: a 30-block drop in Feather Falling IV. Raw damage 30 − 3 = 27 points; the boots remove 48 percent, leaving 27 × 0.52 = 14.04 points, or 7.02 hearts. Survivable, but with under half your bar left — and two blocks of extra height would add another 1.04 points. The pattern to take away is that reductions do not change the slope's linearity, only its steepness: every extra block of drop still costs the same fraction of a point, so "how much higher can I go" is always a one-line division.

What this page deliberately leaves out

Fractional fall distances, Slow Falling and Jump Boost, ender pearl damage (which Feather Falling also reduces), elytra collisions, and mob-specific health pools. Each is real; none changes the core line; and several have edition- or version-specific wrinkles that deserve their own verification pass before we publish numbers about them. The calculator models the documented base system and labels its scope honestly.

Sources

The Feather Falling percentages and the 80 percent family cap are stated on the Minecraft Wiki's Feather Falling page; the Protection per-level figure and the 64 percent full-set figure on its Protection page; the base formula and the hay, honey, water, and slime behavior are on the wiki's fall damage page. Everything was re-checked 2026-09-01 against Java 26.2, and the facts used here match Bedrock's current 26.x line.