Memory cards should be purchased according to how high the resolution or DPI (dots per inch) of your digital camera is (i.e. how many megapixels it has), and how many pictures you plan on taking at a time. We have provided the chart below to assist you in buying an appropriate capacity card for your camera:
| Storage Capacity | Camera Type | ||||||
| 2MP | 3MP | 4MP | 5MP | 6MP | 8MP | 10MP | |
| 32MB | 35 | 26 | 16 | 12 | 10 | 8 | 6 |
| 64MB | 71 | 53 | 32 | 25 | 20 | 16 | 12 |
| 128MB | 142 | 106 | 64 | 51 | 40 | 32 | 25 |
| 256MB | 284 | 213 | 128 | 102 | 80 | 65 | 51 |
| 512MB | 568 | 426 | 256 | 204 | 160 | 131 | 102 |
| 1GB | 1137 | 853 | 512 | 409 | 320 | 264 | 204 |
| 4GB | 4550 | 3412 | 2048 | 1638 | 1280 | 1048 | 816 |
| 8GB | 9100 | 6824 | 4096 | 3276 | 2560 | 2096 | 1632 |
| 16GB | 18200 | 13648 | 8192 | 6552 | 5120 | 4192 | 3264 |