---
title: "Calcium Carbonate — $399K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/calcium-carbonate"
last_updated: "2026-08-10T18:41:20.252Z"
locale: en
meta:
description: "Niche score 55/100 · $399K/yr market · 302K searches/yr · $15.18 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $399K/yr market · 302K searches/yr · $15.18 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Calcium Carbonate — $399K/yr Amazon US Niche (2026) - Flapen"
---
# **calcium carbonate**
**Worth a look**
Shows low returns (0.0%), but strong incumbent ratings (4.7★) keeps it on the watch list.
Market size 55Growth 35Conversion 82Competition 37Returns 100Price range 71Avg price 75Brand share 66Review moat 25Quality gap 22
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.7%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$15.18**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$5.81–$37.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****66%**
top-5 brand share — brands hold most of the demand
**Market size**
**Good****$399K**
$399K/yr · 302K searches
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Okay****+7.6%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****4,229.88**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, calcium carbonate is a $399K/yr Amazon United States market (302K searches/yr). The top 5 brands hold 66% of demand. Verdict: Worth a look — 55/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **calcium carbonate market data**
- **Units sold / yr**
- **25K–30K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **$380K–$455K**
- units × avg price
- **Conversion rate**
- **8.7%**
- **Avg BSR**
- **#346**
- **Page quality**
- **0%**
- **Prime**
- **96%**
- **Sponsored**
- **83%**
- **Out of stock**
- **0.6%**
- **Avg brand age**
- **95 months**
- **Avg seller age**
- **161 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▲rising
**Sellers**
**613**
**Top-5 brand share**
**66%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 96%
**Open market**
**26%**
- NOW Foods21% - Nutricost15% - CAPYBARA Distributors Inc.10% - BulkSupplements10% - PURE ORIGINAL INGREDIENTS10% - Herbs Botanica8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +7.6% search growth over the last 90 days.
6K4KSpike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/health-household/calcium-carbonate/trend)
## **Top calcium carbonate search terms**
- **calcium carbonate**162K/yr+9.8%6.6% conv. - **calcium carbonate powder**89K/yr+5.6%10.0% conv. - **carbonato de calcio**14K/yr+12.8%3.1% conv. - **calcium carbonate powder food grade**11K/yr-5.3%10.3% conv. - **calcium carbonate tablets**12K/yr-24.0%4.4% conv. - **calcium carbonate 1000mg**5K/yr+40.7%5.2% conv. - **calcium bicarbonate**4K/yr+38.2%4.4% conv. - **food grade calcium carbonate**3K/yr+6.9%8.5% conv. - **pure calcium carbonate**3K/yr+14.2%11.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/calcium-carbonate/search-terms)
## **Top calcium carbonate 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%10%$40K20%$80K30%$120K40%$160K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**NOW Foods Supplements Calcium Carbonate Powder High Percentage of Calcium Supports Bone Health* 12-Ounce**NOW Foods**$9.49**4.7★2,672 rev](https://www.amazon.com/dp/B004421K68) [2**Nutricost Calcium Carbonate Powder 500 Grams**Nutricost**$13.84**4.6★1,072 rev](https://www.amazon.com/dp/B07D5KQRCV) [3**Calcium Carbonate Powder 8 Oz (226.8 g) Sold by CAPYBARA Distributors Inc.**CAPYBARA Distributors Inc.**$9.05**4.7★254 rev](https://www.amazon.com/dp/B0CFDD9NKM) [4**BulkSupplements.com Calcium Carbonate Capsules - Calcium Carbonate Supplement Calcium Carbonate 500mg - Calcium Supplement Gluten Free 2 Capsules per Serving 360 Capsules (Pack of 1)**BulkSupplements**$17.72**4.6★405 rev](https://www.amazon.com/dp/B0BNSN9Y3G) [5**Herbs Botanica Calcium Carbonate Powder Food Grade Calcium Supplement for Cooking and Baking Antacid DIY Toothpaste 3.5 oz**Herbs Botanica**$5.81**4.4★98 rev](https://www.amazon.com/dp/B0DZNDV6VB)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Vitamatic Calcium Carbonate Powder 500 g (17.6 oz) Unflavored Dietary Supplement Powder Non-GMO**Vitamatic**$11.80**30 rev4mo ago](https://www.amazon.com/dp/B0GT28VKQW) [**RUNMAG Ultra Fine 400 Mesh Powder Calcium Carbonate 16.0oz USP Food Grade**RUNMAG**$10.02**4 rev5mo ago](https://www.amazon.com/dp/B0FYCY33BK) [**Berkley Jensen Ultra Strength Antacid Chewable Tablets - 1000mg Calcium Carbonate for Heartburn Acid Indigestion Upset Stomach Relief - Assorted Berry Flavor - 265 Count**berkley jensen**$9.96**1,439 rev6mo ago](https://www.amazon.com/dp/B0GJN28LBP) [**Herbs Botanica Calcium Carbonate Powder Food Grade Calcium Supplement for Cooking and Baking Antacid DIY Toothpaste 3.5 oz**Herbs Botanica**$5.81**98 rev1y ago](https://www.amazon.com/dp/B0DZNDV6VB) [**Calcium Carbonate Powder 8 Oz (226.8 g) Sold by CAPYBARA Distributors Inc.**CAPYBARA Distributors Inc.**$9.05**254 rev2y ago](https://www.amazon.com/dp/B0CFDD9NKM)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**RUNMAG Ultra Fine 400 Mesh Powder Calcium Carbonate 16.0oz USP Food Grade**RUNMAG**$10.02**5.0★**▲ 228%**](https://www.amazon.com/dp/B0FYCY33BK) [**Vitamatic Calcium Carbonate Powder 500 g (17.6 oz) Unflavored Dietary Supplement Powder Non-GMO**Vitamatic**$11.80**4.8★**▲ 225%**](https://www.amazon.com/dp/B0GT28VKQW) [**Berkley Jensen Ultra Strength Antacid Chewable Tablets - 1000mg Calcium Carbonate for Heartburn Acid Indigestion Upset Stomach Relief - Assorted Berry Flavor - 265 Count**berkley jensen**$9.96**4.7★**▲ 197%**](https://www.amazon.com/dp/B0GJN28LBP) [**BulkSupplements.com Calcium Carbonate Powder - Calcium Carbonate Food Grade High Absorption - Gluten Free 1.25g per Serving 1kg (2.2 lbs) (Pack of 1)**BulkSupplements**$26.30**4.5★**▲ 139%**](https://www.amazon.com/dp/B00GI1UZKU) [**THORNE - Calcium - (Formerly DiCalcium Malate) - Chelated Calcium for Enhanced Absorption with DimaCal for Bone Density Support* - 120 Capsules**THORNE**$27.06**4.8★**▲ 104%**](https://www.amazon.com/dp/B06VVTCHB8)
**~~View all trending →~~**
## **What buyers say about calcium carbonate**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**16%
*“Good deal”*
**Quality-Overall**15%
*“Good Quality”*
**Calcium**12%
*“Excellent calcium supplement”*
**Advertised Vs Actual Product**7%
*“As advertised”*
**Vitamin**6%
*“Good vitamins, thanks”*
**Efficiency**4%
*“Does a great job when needed”*
**Ingredients-Overall**3%
*“uses organic ingredients”*
**Taste-Overall**3%
*“These antacids taste great”*
**Ease Of Chewing/Swallowing**3%
*“Chewable, great flavors, and very effective”*
**Ease Of Use**3%
*“Ease of use”*
### **What buyers complain about **
**Size-Overall**21%
*“Absolutely ridiculous size”*
**Ease Of Chewing/Swallowing**11%
*“Difficult to chew as they are literally as hard as rocks”*
**Value For Money**4%
*“get a. more expensive”*
**Taste-Overall**4%
*“tasteless”*
**Calcium**4%
*“Apparently low calcium is a thing”*
**Vitamin**3%
*“It would be a great supplement for some just not me”*
**Ingredients-Overall**3%
*“are not the same ingredients listed on the bottle”*
**Smell**3%
*“Horribly strong odor”*
**Acid Regulator/Stomach Ache Relief**2%
*“Stomach pain”*
**Texture/Consistency-Overall**2%
*“texture just gag me”*
### **Top return reasons **
**Calcium**18%
**Functionality-Overall**15%
**Advertised Vs Actual Product**15%
**Ingredients-Overall**12%
**Smell**8%
**Size-Overall**7%
**Ease Of Chewing/Swallowing**4%
**Texture/Consistency-Overall**3%
**Dosage**2%
**Vegan/Organic**2%
## **Common questions**
- **Is calcium carbonate profitable to sell on Amazon United States?**
- The niche generates $399K/yr across 24 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +7.6%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the calcium carbonate niche?**
- 17 brands and 613 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 66% of demand.
- **What do buyers complain about in calcium carbonate?**
- Top complaints mined from reviews: Size-Overall, Ease Of Chewing/Swallowing, Value For Money. The return rate is 0.0%.
- **When does demand for calcium carbonate peak?**
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- **What does it cost to enter the calcium carbonate niche?**
- Listings span $5.81–$37.89; the average listing price is $15.18 (sweet spot $15–$100). The average incumbent carries 4,230 reviews — the moat a new listing must climb.
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