Tile Calculator
Convert between coordinates and XYZ/TMS/quadkey slippy-map tiles.
How to use
- Enter a coordinate and zoom level to get its XYZ tile, TMS y, and Bing quadkey.
- Or enter an area and zoom to list every tile covering it.
X873
Y (XYZ)396
Y (TMS)627
Z10
Quadkey1321103201
BBOX[126.914063, 37.439974, 127.265625, 37.71859]
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Bidirectional Map Tile Conversion
Convert WGS84 coordinates to XYZ, TMS, or Bing quadkeys, or decode tile identifiers to their center coordinates and bounding boxes.
The higher the zoom level, the smaller the real-world area a single tile covers. Different map services use different schemes — XYZ, TMS, or quadkey — so check which one a given tile URL uses before converting.
How to use it
- Enter coordinates to convert, or a tile coordinate (XYZ/TMS) or quadkey to decode.
- Choose the zoom level and scheme — XYZ, TMS, or quadkey.
- Check the resulting tile's center coordinates and bounding box.
Frequently asked questions
What's the difference between XYZ and TMS tiles?
Same x and zoom, but TMS's y-axis is flipped relative to XYZ (counted from the bottom) — a common source of upside-down tile bugs when the two are mixed.
How was the quadkey math verified?
It reproduces Microsoft's own Bing Maps tile system documentation example (x=3, y=5, z=3 → "213") exactly.