Tile calculator displays a bounding box that can be dragged and resized to any position at any zoom level. The extent of this boundingbox is then used to calculate the number of tiles for each zoom level needed to cover the area and also to estimate the total weight of the corresponding pyramid (or mbtiles equivalent). The tile size in KB can be adjusted in the text window provided to better suit your requirements.
Demo: http://betaserver.icgc.cat/visor/calculator.html
Copy the files within a folder on a web server
More information at http://betaportal.icgc.cat/wordpress/tile-calculator/
Copyright (c) 2017- Geostarters (MIT License)
See LICENSE file for more info.