BBox / Tile Calculator

Compute XYZ tiles, quadkeys, and MBTiles fields from a bounding box. Draw on the map or paste coordinates. No upload.

No upload Web Mercator XYZ / TMS / Quadkey

Tip: Click Draw BBox and drag a rectangle, or use Use Map View. Choose a zoom or range to get tile counts, ranges, and quadkeys.

Bounding Box (lon/lat, WGS84)

minX,minY,maxX,maxY

Example: 27.9,-26.3,28.3,-25.9 (lon/lat). Values are clamped to Web Mercator: lat ±85.0511.

Zoom min

Zoom max

Scheme

Precision:

Clamped bbox (WGS84):

—

WMTS (EPSG:3857) bbox:

—

Center (lon,lat):

—

Quadkey (center@z):

—

—

Zoom	X range	Y range	XYZ sample	Quadkey sample

MBTiles metadata (suggested)

name

attribution

format

bounds

center

minzoom

maxzoom

Map

Notes:

All calculations assume EPSG:3857 / Web Mercator for tiles; inputs/outputs use WGS84 (lon/lat).
TMS flips Y relative to XYZ. Quadkey uses XYZ scheme.
Large zoom ranges can generate millions of tiles — keep an eye on Tile count.