If I am using the coordinate system WGS84 ESPG:4326 and my cell size is 0.00833333,-0.00833333, how can I calculate the area of one cell in metres?

I am currently trying to undertake some area calculations on some rasters. I have them all in the coordinate system wgs84 ESPG:4326 which I have just realised is in degrees. My cell size is 0.00833333,-0.00833333. How can I figure out the cell size in metres.