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EasingClassic eases

easeInOutQuint

It is slow at both ends and fast in the middle. A very strong ease: the curve is almost a wall at the fast end.

easeInOutQuint reaches 50% of its travel at 50% of the time and 90% at 64%. Its peak speed is 5x the average.

Classic easesfamily: quintpeak 5x

Progress against time0100.51progress50%90%
The dashed line is linear. The dots mark 50% and 90% of the travel.
Velocity, in multiples of average speed01400.51speed, 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.

easeInOutQuint
linear

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

Numbers

50% of travel
50%of the time
90% of travel
64%of the time
After 10% of time
0.02%of the travel is done
Peak speed
5xtimes the average
Overshoot
0%stays inside the end
Undershoot
0%never below the start
linear() points
81at a 0.002 tolerance
cubic-bezier
closeworst gap 3.0 points

Copy the code

css linear() (exact)
animation-timing-function: linear(0, 0, 0, 0, 0, 0, 0, 0.0001, 0.0002, 0.0003, 0.0005, 0.0008, 0.0012, 0.0018, 0.0026, 0.0037, 0.0051, 0.0069, 0.0092, 0.0121, 0.0156, 0.0199, 0.0252, 0.0314, 0.0389, 0.0477, 0.058, 0.0701, 0.084, 0.1002, 0.1187, 0.1398, 0.1638, 0.1911, 0.2219, 0.2565, 0.2952, 0.3386, 0.3869, 0.4405, 0.5, 0.5595, 0.6131, 0.6614, 0.7048, 0.7435, 0.7781, 0.8089, 0.8362, 0.8602, 0.8813, 0.8998, 0.916, 0.9299, 0.942, 0.9523, 0.9611, 0.9686, 0.9748, 0.9801, 0.9844, 0.9879, 0.9908, 0.9931, 0.9949, 0.9963, 0.9974, 0.9982, 0.9988, 0.9992, 0.9995, 0.9997, 0.9998, 0.9999, 1, 1, 1, 1, 1, 1, 1);
cubic-bezier (nearest fit)
animation-timing-function: cubic-bezier(0.84, 0, 0.16, 1);

Least-squares fit to the easeInOutQuint curve; the worst gap is 3.0 points of travel. It is close, not exact: use linear() when the end of the curve matters.

web animations api
el.animate({ translate: ['0 0', '240px 0'] }, { duration: 600, easing: 'linear(0, 0, 0, 0, 0, 0, 0, 0.0001, 0.0002, 0.0003, 0.0005, 0.0008, 0.0012, 0.0018, 0.0026, 0.0037, 0.0051, 0.0069, 0.0092, 0.0121, 0.0156, 0.0199, 0.0252, 0.0314, 0.0389, 0.0477, 0.058, 0.0701, 0.084, 0.1002, 0.1187, 0.1398, 0.1638, 0.1911, 0.2219, 0.2565, 0.2952, 0.3386, 0.3869, 0.4405, 0.5, 0.5595, 0.6131, 0.6614, 0.7048, 0.7435, 0.7781, 0.8089, 0.8362, 0.8602, 0.8813, 0.8998, 0.916, 0.9299, 0.942, 0.9523, 0.9611, 0.9686, 0.9748, 0.9801, 0.9844, 0.9879, 0.9908, 0.9931, 0.9949, 0.9963, 0.9974, 0.9982, 0.9988, 0.9992, 0.9995, 0.9997, 0.9998, 0.9999, 1, 1, 1, 1, 1, 1, 1)', fill: 'both' });
vawe
import { easeInOutQuint } from '../../core/motion/curves.js';
import { curveToLinear } from '../../core/motion/springs.js';

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

When to use it, and when to avoid it

Use it for

  • Moves between two resting positions: camera pushes, slides and loops.
  • For quint: hero entrances and large elements that should settle with weight.

Avoid it for

  • Quick UI feedback under 200 ms: the slow start delays the response.
  • For quint: small elements: they seem to teleport and then crawl.

The nearest vawe ease

The closest of the nine vawe After Effects eases is swap, an RMS gap of 0.0314 in progress. After Effects and vawe set the shape with two handles, so it can be tuned where a named curve cannot.