diff --git a/README.md b/README.md
index 5c190aa..dd551d0 100644
--- a/README.md
+++ b/README.md
@@ -82,31 +82,31 @@ function geometryToCells(geometry: GeoJSONGeometry, resolution: bigint): bigint
 ## cellToBoundary
 
 ```javascript
-function cellToBoundary(quadbin: bigint): Polygon 
+function cellToBoundary(quadbin: Quadbin): Polygon 
 ```
 
 Converts a Quadbin cell identifier into a geographical boundary represented as a polygon
 
-## quadbinToOffset
+## cellToOffset
 
 ```javascript
-function quadbinToOffset(quadbin: bigint): [number, number, number]
+function cellToOffset(quadbin: Quadbin): [number, number, number]
 ```
 
 Converts a Quadbin cell identifier into world coordinates offset values
 
-## quadbinToWorldBounds
+## cellToWorldBounds
 
 ```javascript
-function quadbinToWorldBounds(quadbin: bigint, coverage: number): [number[], number[]]
+function cellToWorldBounds(quadbin: Quadbin, coverage: number): [number[], number[]]
 ```
 
 Computes the world bounds (in Web Mercator coordinates) for a given Quadbin cell, taking into account the cell's coverage area
 
-## getQuadbinPolygon
+## getCellPolygon
 
 ```javascript
-function getQuadbinPolygon(quadbin: bigint, coverage = 1): number[]
+function getCellPolygon(quadbin: Quadbin, coverage = 1): number[]
 ```
 
 Generates the geographical polygon (in longitude and latitude) that represents the boundaries of a Quadbin cell, optionally taking into account coverage
diff --git a/src/index.ts b/src/index.ts
index c984655..561967c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -17,22 +17,22 @@ type Tile = {x: number; y: number; z: number};
 
 const TILE_SIZE = 512;
 
-export function quadbinToOffset(quadbin: bigint): [number, number, number] {
+export function cellToOffset(quadbin: Quadbin): [number, number, number] {
   const {x, y, z} = cellToTile(quadbin);
   const scale = TILE_SIZE / (1 << z);
   return [x * scale, TILE_SIZE - y * scale, scale];
 }
 
-export function quadbinToWorldBounds(quadbin: bigint, coverage: number): [number[], number[]] {
-  const [xOffset, yOffset, scale] = quadbinToOffset(quadbin);
+export function cellToWorldBounds(quadbin: Quadbin, coverage: number): [number[], number[]] {
+  const [xOffset, yOffset, scale] = cellToOffset(quadbin);
   return [
     [xOffset, yOffset],
     [xOffset + coverage * scale, yOffset - coverage * scale]
   ];
 }
 
-export function getQuadbinPolygon(quadbin: bigint, coverage = 1): number[] {
-  const [topLeft, bottomRight] = quadbinToWorldBounds(quadbin, coverage);
+export function getCellPolygon(quadbin: Quadbin, coverage = 1): number[] {
+  const [topLeft, bottomRight] = cellToWorldBounds(quadbin, coverage);
   const [w, n] = worldToLngLat(topLeft);
   const [e, s] = worldToLngLat(bottomRight);
   return [e, n, e, s, w, s, w, n, e, n];
@@ -115,8 +115,8 @@ export function geometryToCells(geometry, resolution: bigint): Quadbin[] {
   }).map(([x, y, z]) => tileToCell({x, y, z}));
 }
 
-export function cellToBoundary(cell: bigint): Polygon {
-  const bbox = getQuadbinPolygon(cell);
+export function cellToBoundary(cell: Quadbin): Polygon {
+  const bbox = getCellPolygon(cell);
   const boundary = [
     [bbox[0], bbox[1]],
     [bbox[2], bbox[3]],