House Rule: Fall damage based on mass (size)

Variant Rule: Falling Damage by Size

Falling damage is determined by a creature’s size (mass), rather than using a fixed value.

A falling creature takes damage based on its size for every 10 feet fallen (to a maximum, as noted below). A successful Reflex save (DC 20) halves the damage taken.

Falling Damage by Size

Size	Damage per 10 ft.	Maximum Damage
Fine	—	—
Diminutive	1	10
Tiny	1d4	5d4
Small	1d6	10d6
Medium	1d6	20d6
Large	1d8	30d8
Huge	1d10	50d10
Gargantuan	2d10	100d10
Colossal	4d10	200d10

Notes

• Damage is cumulative per 10 feet fallen, up to the listed maximum.
• Creatures of Fine size or smaller take no falling damage.
• Apply any relevant modifiers (such as damage reduction) after determining total damage.

To explain:

What happens if you throw an elephant off a skyscraper?