A crude Instagram hashtag like calculator. Theoretically can grab up to 100,000 pics of likes (an hour), given Instagram's API throttling. It's not 100% reflective of all images in a hashtag, Instagram doesn't return full data sets. But it can report averages and project a total, if that's useful to ya. Get your own access key and try it out.

likecounter.js

var request = require("request");
var moment = require("moment");

var access_token = '';

var getTotalLikes = function( hashtag, callback ) {
    var realCount;

    var totalLikes = 0;
    var totalImages = 0;
    var totalRequests = 0;

    var lookup = {};

    var getPage = function getPage( hashtag, page, callback ) {
        var endpoint;

        if ( page ) {
            endpoint = page;
        } else {
            endpoint = 'https://api.instagram.com/v1/tags/' + hashtag + '/media/recent?access_token=' + access_token;
        }

        request.get({
            url: endpoint,
            json: true
        }, function( error, response, body ) {
            if ( error ) {
                callback();
            } else {
                totalRequests++;
                var createdTime;

                for ( var i in body.data ) {
                    var image = body.data[i];

                    totalImages++;

                    totalLikes += image.likes.count;
                    createdTime = image.created_time;
                }

                var ago = moment.unix( parseInt(createdTime) ).fromNow();

                if ( !body.pagination.next_url ) {
                    callback();
                } else {
                    getPage( hashtag, body.pagination.next_url, callback );    
                }
            }
        });
    }


    request({
        url: 'https://api.instagram.com/v1/tags/' + hashtag + '?access_token=' + access_token,
        json: true
    }, function( error, response, body ) {
        realCount = body.data.media_count;

        getPage( hashtag, false, function() {
            callback( totalLikes, totalImages, totalRequests, realCount );
        });
        
    });
};

getTotalLikes("funeralselfie", function( likes, images, requests, realCount ) {
    var percentage = ( images / realCount ) * 100;
    var average = likes / images;
    var projected = realCount * average;

    console.log("Done - " + images + " images; >" + likes + " likes; " + requests + " requests.")

    console.log( "Sample size: " + percentage + "%; Average likes: " + average + "; Projected Total: " + projected );
});