Looking for a reliable calculator? Read our comprehensive review of the Casio FX-991ES Plus calculator to find out why it's considered one of the best calculators on the market.
Looking for a reliable calculator? Read our comprehensive review of the Casio FX-991ES Plus calculator to find out why it's considered one of the best calculators on the market.
in 3 offers
The lowest price for Casio Scientific Calculator FX-991ES Plus 2nd Edition right now is $42.99 at eBay.com.au, compared across 3 retailers.
The all-time low was $12.40 on 5 Mar 2026 — today's price is 247% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 9 June 2026.
Casio Scientific Calculator FX-991ES Plus 2nd Edition
Looking for a reliable calculator? Read our comprehensive review of the Casio FX-991ES Plus calculator to find out why it's considered one of the best calculators on the market.
Looking for a reliable calculator? Read our comprehensive review of the Casio FX-991ES Plus calculator to find out why it's considered one of the best calculators on the market.
Last updated at 09/06/2026 07:22:06
Casio Scientific Calculator Fx-991 Fx991es Fx-991esplus-2-w 2nd
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Casio fx-991ES PLUS 2nd Edition Non-programmable scientific calculator
Delivery $10
FX-991ES Plus-2nd Edition Scientific Calculator
Delivery between 15–18 June $29
originally posted on shopee.ph
Performance:10/10Quality:9/10Suitability:9/10perfect for students who are looking for an affordable, yet functional scientific calculator! tried it earlier and it matched with the answers sa notes ko:) yung power button medyo sunken (?) but still functional
originally posted on shopee.ph
Quality:5/10Suitability:3/10Performance:9/10Added 3 stars for it functions like an original casio. 2 stars for its affordable price. Lessened 2 stars for legitimacy of the product, as it was advertised 100% authentic - it is not. Removed a star for the packaging of the product: it was creased on the sides like it was squished. Overall, I cannot recommend this product for those looking for an authentic one.
originally posted on shopee.ph
Performance:all functioning like the genuineQuality:fit for the price, buttons are low qualitySuitability:not yetI recommend this product for light used.. i dont think its gonna last for 5 years but we'll.see.. the buttons are not the best like the original product.. but for prqctice purposes and for the price.. ok lang.. functioning like the original.. oks na yun..
| Calculator Type | Engineering/Scientific |
| Power source | Solar |
| Screen size | 4 Inches |
| Product dimensions | 16.2 x 7.7 x 1.1 cm; 95 Grams |
| Batteries | 1 LR44 batteries required. (included) |
Casio Scientific Calculator Fx-991 Fx991es Fx-991esplus-2-w 2nd
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Casio fx-991ES PLUS 2nd Edition Non-programmable scientific calculator
Delivery $10
FX-991ES Plus-2nd Edition Scientific Calculator
Delivery between 15–18 June $29
Performance:10/10Quality:9/10Suitability:9/10perfect for students who are looking for an affordable, yet functional scientific calculator! tried it earlier and it matched with the answers sa notes ko:) yung power button medyo sunken (?) but still functional
Quality:5/10Suitability:3/10Performance:9/10Added 3 stars for it functions like an original casio. 2 stars for its affordable price. Lessened 2 stars for legitimacy of the product, as it was advertised 100% authentic - it is not. Removed a star for the packaging of the product: it was creased on the sides like it was squished. Overall, I cannot recommend this product for those looking for an authentic one.
Performance:all functioning like the genuineQuality:fit for the price, buttons are low qualitySuitability:not yetI recommend this product for light used.. i dont think its gonna last for 5 years but we'll.see.. the buttons are not the best like the original product.. but for prqctice purposes and for the price.. ok lang.. functioning like the original.. oks na yun..
This calculator is an improvement over the previous version, loved by many fellow high school students. This revamped version includes Casio's easy-to-use conversion & scientific functions; reliable battery & solar operation; smart-looking styling; and the most crucial fraction buttons.In terms of features, this has to most bang-for-your-buck for any student. It will continue to be my top choice. And even midst the boredom that is Math Class, you shall witness your classmates lust over this amazing calculator.
| Calculator Type | Engineering/Scientific |
| Power source | Solar |
| Screen size | 4 Inches |
| Product dimensions | 16.2 x 7.7 x 1.1 cm; 95 Grams |
| Batteries | 1 LR44 batteries required. (included) |
