---
title: "Casio Fx-991ex — £581K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/stationery-office-supplies/casio-fx-991ex"
last_updated: "2026-07-31T15:35:38.386Z"
locale: en
meta:
description: "Niche score 44/100 · £581K/yr market · 312K searches/yr · £36.06 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £581K/yr market · 312K searches/yr · £36.06 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Casio Fx-991ex — £581K/yr Amazon UK Niche (2026) - Flapen"
---
# **casio fx-991ex**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 63Growth 20Conversion 60Competition 15Returns 93Price range 95Avg price 95Brand share 0Review moat 33Quality gap 30
**Avg price**
**Incredible****£36.06**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****£15.12–£95.68**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Great****1.1%**
return rate — above 5% kills the launch gate
**Market size**
**Good****£581K**
£581K/yr · 312K searches
**Conversion**
**Good****5.2%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****3,225.5**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-10.8%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, casio fx-991ex is a £581K/yr Amazon United Kingdom market (312K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 44/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **casio fx-991ex market data**
- **Units sold / yr**
- **20K–25K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **£721K–£902K**
- units × avg price
- **Conversion rate**
- **5.2%**
- **Avg BSR**
- **#42**
- **Page quality**
- **0%**
- **Prime**
- **80%**
- **Sponsored**
- **60%**
- **Out of stock**
- **1.0%**
- **Avg brand age**
- **35 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **—flat
**Sellers**
**66**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**0%**
- Casio88% - OSALO7% - Rppiup5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -10.8% search growth over the last 90 days.
150K100KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Aug, Sep · busiest ÷ quietest = 35.3×
[**Open Trend **](https://flapen.com/research/uk/stationery-office-supplies/casio-fx-991ex/trend)
## **Top casio fx-991ex search terms**
- **casio fx-991cw**72K/yr+10.4%11.6% conv. - **casio fx-991ex**47K/yr-18.7%2.5% conv. - **a level maths calculator**32K/yr-15.0%6.5% conv. - **fx-991cw**22K/yr-3.7%11.7% conv. - **fx-991ex**17K/yr-22.7%2.0% conv. - **casio fx991ex**12K/yr-10.4%2.8% conv. - **casio fx-991ex classwiz**13K/yr-20.8%2.0% conv. - **casio 991ex**10K/yr-19.4%2.6% conv. - **a-level calculator**9K/yr-2.7%1.8% conv. - **casio fx 991ex**10K/yr-23.0%2.5% conv. [**All search terms **](https://flapen.com/research/uk/stationery-office-supplies/casio-fx-991ex/search-terms)
## **Top casio fx-991ex products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%£87K30%£174K45%£261K60%£348K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Casio fx-991CW Advanced Scientific Calculator (UK Version)**Casio**£20.32**4.7★2,588 rev](https://www.amazon.co.uk/dp/B0BVVZYNQH) [2**CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION) Black**Casio**£43.47**4.7★9,517 rev](https://www.amazon.co.uk/dp/B0719FWP3X) [3**Casio fx-991CW+ Scientific Calculator Black (UK Version) - Upgrade from Previous fx-991CW Model**Casio**£24.29**4.7★68 rev](https://www.amazon.co.uk/dp/B0G52ZCYCW) [4**OSALO Scientific Calculator 552 Functions A Level Maths Black OS-991EX CW**OSALO**£19.99**4.7★63 rev](https://www.amazon.co.uk/dp/B0DXNHM432) [5**Casio fx-991CW including a WYNGS protective case in Black - Basic Set**Casio**£31.59**4.5★52 rev](https://www.amazon.co.uk/dp/B0CJYJRM4H)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Casio fx-991CW+ including a protective case in Black - Basic Set**Casio**£33.23**1 rev4mo ago](https://www.amazon.co.uk/dp/B0GSR49S9B) [**FX-991EX Scientific Calculator A Level Maths Calculator with 552 Functions 10+2 Digits Written Display Portable Calculators Scientific for Students Teachers Business School Office (Black)**Rppiup**£15.12**3 rev6mo ago](https://www.amazon.co.uk/dp/B0GH1L8NCD) [**Casio fx-991CW+ Scientific Calculator Black (UK Version) - Upgrade from Previous fx-991CW Model**Casio**£24.29**68 rev6mo ago](https://www.amazon.co.uk/dp/B0G52ZCYCW) [**OSALO Scientific Calculator 552 Functions A Level Maths Black OS-991EX CW**OSALO**£19.99**63 rev1y ago](https://www.amazon.co.uk/dp/B0DXNHM432) [**Casio fx-991CW including a WYNGS protective case in Black - Basic Set**Casio**£31.59**52 rev2y ago](https://www.amazon.co.uk/dp/B0CJYJRM4H)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**FX-991EX Scientific Calculator A Level Maths Calculator with 552 Functions 10+2 Digits Written Display Portable Calculators Scientific for Students Teachers Business School Office (Black)**Rppiup**£15.12**3.5★**▲ 435%**](https://www.amazon.co.uk/dp/B0GH1L8NCD) [**Casio fx-991CW+ including a protective case in Black - Basic Set**Casio**£33.23**5.0★**▲ 428%**](https://www.amazon.co.uk/dp/B0GSR49S9B) [**Casio fx-991CW+ Scientific Calculator Black (UK Version) - Upgrade from Previous fx-991CW Model**Casio**£24.29**4.7★**▲ 210%**](https://www.amazon.co.uk/dp/B0G52ZCYCW) [**Casio fx-991CW including a WYNGS protective case in Black - Basic Set**Casio**£31.59**4.5★**▲ 23%**](https://www.amazon.co.uk/dp/B0CJYJRM4H) [**Casio FX991EX Scientific Calculator 192x63**Casio**£53.99**4.6★**▲ 20%**](https://www.amazon.co.uk/dp/B011UK5DGY)
**~~View all trending →~~**
## **What buyers say about casio fx-991ex**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**25%
*“Good product as describes”*
**Ease Of Use**18%
*“Very easy to use”*
**Value For Money**17%
*“Worth it”*
**Advertised Vs Actual Product**9%
*“Does the job”*
**Strength**4%
*“sturdy too”*
**Measurement/Reading Accuracy**4%
*“especially useful in statistics”*
**Touch/Button Controls**4%
*“Button responsiveness, man this review idea thing is trying to pick anything out, yes it works good good”*
**Battery Life**3%
*“Battery life and button functioning is very good”*
**Durability**3%
*“The build quality is excellent, and it feels solid and durable”*
**Functionality-Overall**2%
*“And also additional operations in the menus”*
### **What buyers complain about **
**Durability**15%
*“Unfortunately, the first one broke so this is our second purchase”*
**Value For Money**12%
*“ong its expensive”*
**Instructions/User Manual/Troubleshooting**10%
*“No instructions and turned on for the first time and stating low battery”*
**Touch/Button Controls**10%
*“functions that once had buttons are now hidden in menus”*
**Display Brightness**10%
*“The screen is very dark”*
**Quality-Overall**5%
*“Rubbish Piece of Junk”*
**Charging**5%
*“God knows what the stupid solar panel is for as it doesnt work without a charged battery”*
**Ease Of Use**3%
*“the layout makes it a bit hard to use”*
**Advertised Vs Actual Product**3%
*“I know this because I dismantled it as soon as it arrived. see photograph”*
**Battery Life**2%
*“Dunno bout battery life”*
### **Top return reasons **
**Functionality-Overall**30%
**Certifications**11%
**Touch/Button Controls**9%
**Advertised Vs Actual Product**7%
**Defective Material/Parts**7%
**Value For Money**6%
**Product Condition**4%
**Quality-Overall**4%
**Compatibility-Overall**3%
**Ease Of Use**2%
## **Common questions**
- **Is casio fx-991ex profitable to sell on Amazon United Kingdom?**
- The niche generates £581K/yr across 10 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -10.8%. Flapen's verdict: Skip it (44/100).
- **How competitive is the casio fx-991ex niche?**
- 3 brands and 66 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in casio fx-991ex?**
- Top complaints mined from reviews: Durability, Value For Money, Instructions/User Manual/Troubleshooting. The return rate is 1.1%.
- **When does demand for casio fx-991ex peak?**
- Demand peaks in Aug–Sep; the busiest month runs 35.3× the quietest.
- **What does it cost to enter the casio fx-991ex niche?**
- Listings span £15.12–£95.68; the average listing price is £36.06 (sweet spot $15–$100). The average incumbent carries 3,226 reviews — the moat a new listing must climb.
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