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EasingClassic eases

easeOutQuad

It starts fast and ends slowly. A mild, even curve: a clear ease without drama.

easeOutQuad reaches 50% of its travel at 29% of the time and 90% at 68%. Its peak speed is 2x the average.

Classic easesfamily: quadpeak 2x

Progress against time0100.51progress50%90%
The dashed line is linear. The dots mark 50% and 90% of the travel.
Velocity, in multiples of average speed0100.51speed, x average
The dashed line is 1x, the speed of linear.

Live demo

The blue box uses the exact linear() string below, in your browser. The grey box is linear.

easeOutQuad
linear

Your system asks for reduced motion, so the boxes rest at the end of the move.

Numbers

50% of travel
29%of the time
90% of travel
68%of the time
After 10% of time
19%of the travel is done
Peak speed
2xtimes the average
Overshoot
0%stays inside the end
Undershoot
0%never below the start
linear() points
41at a 0.002 tolerance
cubic-bezier
exactworst gap 0.2 points

Copy the code

css linear() (exact)
animation-timing-function: linear(0, 0.0494, 0.0975, 0.1444, 0.19, 0.2344, 0.2775, 0.3194, 0.36, 0.3994, 0.4375, 0.4744, 0.51, 0.5444, 0.5775, 0.6094, 0.64, 0.6694, 0.6975, 0.7244, 0.75, 0.7744, 0.7975, 0.8194, 0.84, 0.8594, 0.8775, 0.8944, 0.91, 0.9244, 0.9375, 0.9494, 0.96, 0.9694, 0.9775, 0.9844, 0.99, 0.9944, 0.9975, 0.9994, 1);
cubic-bezier (matches within 0.5%)
animation-timing-function: cubic-bezier(0.32, 0.64, 0.66, 1);

Least-squares fit to the easeOutQuad curve; the worst gap is 0.2 points of travel. The linear() string is exact.

web animations api
el.animate({ translate: ['0 0', '240px 0'] }, { duration: 600, easing: 'cubic-bezier(0.32, 0.64, 0.66, 1)', fill: 'both' });
vawe
import { easeOutQuad } from '../../core/motion/curves.js';
import { curveToLinear } from '../../core/motion/springs.js';

const easing = curveToLinear(easeOutQuad, { tolerance: 0.002 }); // the linear() string above
const x = easeOutQuad(u);                                         // per-frame code, u in 0..1

When to use it, and when to avoid it

Use it for

  • Entrances and replies to a click, where the thing should respond at once and then settle.
  • For quad: small UI changes and hover states where a light ease is enough.

Avoid it for

  • Loops: it stops dead at the end and has no speed to hand on.
  • For quad: hero moves: the stop is too soft to feel designed.

The nearest vawe ease

The closest of the nine vawe After Effects eases is landSoft, an RMS gap of 0.1121 in progress. After Effects and vawe set the shape with two handles, so it can be tuned where a named curve cannot.