🏗️

Revit Family Performance Estimator

Estimate the performance impact of Revit families before loading them into your project model. Overly complex families are the #1 cause of slow Revit models — calculate your risk upfront.

Family Entries(1/5)

Family 1

Family Name

Typical Complexity Guidelines by Category

Category	Typical Complexity	Best Practice Notes
Furniture	Simple–Moderate	Use simplified geometry for large offices; detail views only
MEP Equipment	Moderate–Complex	Avoid full pipe/conduit geometry in family; use connectors
Structural Framing	Simple–Moderate	Profile-based extrusions preferred over swept blends
Lighting Fixtures	Moderate–Complex	Separate electrical/photometric from 3D body nested family
Specialty Equipment	Complex–Very Complex	Consider manufacturer simplified families for early phases
Casework	Simple–Moderate	Parametric casework can be Very Complex — audit parameter count
Doors/Windows	Moderate	Nested panel/frame families add significant overhead
Generic Model	Varies	Often used as containers — audit for unnecessary nesting

Scoring Algorithm Reference

Base Complexity

Simple: 1 pt
Moderate: 3 pts
Complex: 8 pts
Very Complex: 20 pts

Modifiers

Each nested family: +3 pts
Types ×1 / ×1.5 / ×2 / ×3
Detail level ×1 / ×1.5 / ×2
Instance scale ×1–5 (capped)

File Size (per 1K instances)

Simple: 0.01 MB
Moderate: 0.05 MB
Complex: 0.20 MB
Very Complex: 0.50 MB

View Regen Thresholds

Score <10: Fast
Score 10–30: Moderate
Score 30–60: Slow
Score >60: Very Slow