3.15 in 6.38 in  | 3.15 in 0.44 in  | |
| Available colors | ||
| User rating |
 Casio FX-991DE Plus |  Casio FX-991ES Plus | |
|---|---|---|
| Type | Scientific calculator | Scientific calculator |
| Casio FX-991DE Plus | Casio FX-991ES Plus | |
|---|---|---|
| Colour of product |
|
|
| Control type | Buttons | Buttons |
| Form factor | ||
| Cover | yes | no |
| Casio FX-991DE Plus | Casio FX-991ES Plus | |
|---|---|---|
| Width | 3.15 in | 3.15 in |
| Height | 6.38 in | 0.44 in |
| Depth | 0.44 in | 6.38 in |
| Weight | 3.35 oz | 3.35 oz |
| Casio FX-991DE Plus | Casio FX-991ES Plus | |
|---|---|---|
| Number of characters per line | 12 | 15 |
| Display type | Dot-matrix | Dot-matrix |
| Display tilting | no | yes |
| Second display | no | no |
| Display light | yes | no |
| Casio FX-991DE Plus | Casio FX-991ES Plus | |
|---|---|---|
| Power source |
|
|
| Battery operated | yes | yes |
| Auto power off | yes | yes |
| Number of batteries required | 1 | 1 |
| External power connection | Solar cell |
|
| Pros | ||
|---|---|---|
| Cons |
Add products
