After Effects expression that increments a number, with Ease and Wizz easing. It takes the start value from the name of the text layer, and the end value from a marker comment on that same layer. #easeandwizz

Count up to a number.js

// Count up to a specified value in a given amount of time.
// With commas! If you're into that kind of thing.

// how to set up …

// start : this layer's name (i.e. call it an integer like "0")
// duration: add an expression slider called "duration"
// total: add a marker with a comment, that's the number to count up to
// delay: edit the value below
var DELAY = 0;			// time to begin counting

function easeandwizz_inOutCirc(t, b, c, d) {
	if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
	return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
}

function easeandwizz_outExpo(t, b, c, d) {
	return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
}



var m = thisLayer.marker.nearestKey(time);

var BEGIN = parseInt(thisLayer.name);
var DURATION = effect("duration")("Slider");		// seconds
var TOTAL = parseInt(m.comment);	// number to count up to

addCommas(count());


function count() {
	var normalised = linear(time, inPoint + DELAY, inPoint + DURATION + DELAY, 0, DURATION);
	return Math.floor(easeandwizz_outExpo( normalised, BEGIN, TOTAL - BEGIN, DURATION ));
}

function addCommas(nStr) {
	// from http://www.mredkj.com/javascript/nfbasic.html
	nStr += '';
	x = nStr.split('.');
	x1 = x[0];
	x2 = x.length > 1 ? '.' + x[1] : '';
	var rgx = /(\d+)(\d{3})/;
	while (rgx.test(x1)) {
		x1 = x1.replace(rgx, '$1' + ',' + '$2');
	}
	return x1 + x2;
}

// After Effects expression | Ian Haigh | ianhaigh.com

You rock. Thank you!