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EasingClassic eases

easeInQuint

It starts slowly and ends fast. A very strong ease: the curve is almost a wall at the fast end.

easeInQuint reaches 50% of its travel at 87% of the time and 90% at 98%. 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.

easeInQuint
linear

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

Numbers

50% of travel
87%of the time
90% of travel
98%of the time
After 10% of time
0%of the travel is done
Peak speed
5xtimes the average
Overshoot
0%stays inside the end
Undershoot
0%never below the start
linear() points
41at a 0.002 tolerance
cubic-bezier
closeworst gap 1.1 points

Copy the code

css linear() (exact)
animation-timing-function: linear(0, 0, 0, 0, 0, 0, 0.0001, 0.0002, 0.0003, 0.0006, 0.001, 0.0016, 0.0024, 0.0036, 0.0053, 0.0074, 0.0102, 0.0139, 0.0185, 0.0242, 0.0313, 0.0399, 0.0503, 0.0629, 0.0778, 0.0954, 0.116, 0.1401, 0.1681, 0.2003, 0.2373, 0.2796, 0.3277, 0.3822, 0.4437, 0.5129, 0.5905, 0.6772, 0.7738, 0.8811, 1);
cubic-bezier (nearest fit)
animation-timing-function: cubic-bezier(0.64, 0, 0.78, 0);

Least-squares fit to the easeInQuint curve; the worst gap is 1.1 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, 0.0001, 0.0002, 0.0003, 0.0006, 0.001, 0.0016, 0.0024, 0.0036, 0.0053, 0.0074, 0.0102, 0.0139, 0.0185, 0.0242, 0.0313, 0.0399, 0.0503, 0.0629, 0.0778, 0.0954, 0.116, 0.1401, 0.1681, 0.2003, 0.2373, 0.2796, 0.3277, 0.3822, 0.4437, 0.5129, 0.5905, 0.6772, 0.7738, 0.8811, 1)', fill: 'both' });
vawe
import { easeInQuint } from '../../core/motion/curves.js';
import { curveToLinear } from '../../core/motion/springs.js';

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

When to use it, and when to avoid it

Use it for

  • Exits and build-ups that leave the frame at speed.
  • For quint: hero entrances and large elements that should settle with weight.

Avoid it for

  • Entrances: the first frames barely move, so the viewer waits.
  • 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 launch, an RMS gap of 0.1459 in progress. After Effects and vawe set the shape with two handles, so it can be tuned where a named curve cannot.