Timing & Spacing
Part of: The 12 Principles of Animation
Timing and spacing in animation refer to how long an action takes (timing) and how its drawings are distributed across that time (spacing), governing weight and personality.
Even spacing creates a robotic feel, while eased spacing (slow-in, slow-out) feels more natural. Mastery of timing and spacing is the mark of a skilled animator and is fundamental to both 2D and 3D work.
Related
Related concepts
Related services
Sources
Academic papers, recognised industry standards, and canonical industry texts that back up claims in this entry.
- The Animator's Survival Kit. Williams, Faber and Faber, 2001Supports: spacing easing natural motion weight personality
- The Animator's Survival Kit. Williams, R., Faber and Faber, 2001Supports: Canonical industry text on animation craft and timing
- Principles of traditional animation applied to 3D computer animation. Lasseter, J., ACM SIGGRAPH Computer Graphics, 1987Supports: Translation of timing and spacing principles to computer animation
Frequently asked questions
How do timing and spacing differ?
Timing is how many frames an action takes from start to end. Spacing is how those frames are distributed within that time. The same eight frames of a ball moving can read as floating (even spacing) or heavy (clustered at the end). Timing controls the duration; spacing controls the feel of motion within that duration.
What are 'ease in' and 'ease out'?
Ease in and ease out describe spacing curves. Ease out means a movement starts fast and slows into its end pose; ease in means it starts slow and accelerates out. Most natural movement uses both: a slow-in at the start, fast through the middle, and a slow-out at the end. Linear (even) spacing rarely feels natural for organic motion, which is why eased curves are the default in animation craft.
Can AI handle timing and spacing automatically?
AI tools can generate in-between frames between two key poses, which handles spacing mechanically. They cannot yet make the timing decisions: how long a beat should land, where the pause goes, how heavy a footfall should feel. We use AI in-betweening inside our AI-assisted animation workflow, with human animators setting the keyframes and the timing.