The ETH/BTC Ratio Fell Again. What It Measures and What It Does Not Tell You
6 min read
Loading...
6 min read
Last week, bitcoin fell 2.81%. Ether fell 6.77%.
Both went down. But ether went down more than twice as far. That gap is exactly what the ETH/BTC ratio captures, and it is why you keep seeing headlines that say the ratio "fell again".
This post explains what the ETH/BTC ratio is in plain words, how to work it out yourself, and, just as important, what it cannot tell you.
It is the price of one ether (ETH) measured in bitcoin (BTC), not in dollars.
Normally we say "ether costs $2,488". The ratio asks a different question: "How much bitcoin does one ether cost?"
Using the weekly closing prices The Rio Times reported for 9 October 2026, ether was about $2,488 and bitcoin about $82,123. Divide the first by the second and you get about 0.0303. That means one ether cost roughly 0.03 of a bitcoin.
CoinGecko showed about 0.0301 on 11 October 2026. A 24/7 Wall St. article put it at 0.03014 on 10 October.
You can flip it around. One divided by 0.0301 is about 33. So you would need roughly 33 ether to buy one bitcoin.
Both ways of saying it describe the same number. The version quoted in headlines is almost always the small decimal.
You do not need the dollar price of either coin to see why. Only the relative move matters.
Here is the weekly arithmetic. It is NetWort's own calculation from the reported weekly moves, not a quoted market figure.
| Weekly move | Price at week close | |
|---|---|---|
| Bitcoin | -2.81% | about $82,123 |
| Ether | -6.77% | about $2,488 |
Ether kept 93.23% of its value. Bitcoin kept 97.19%. Divide one by the other: 0.9323 ÷ 0.9719 = 0.959.
So the ratio dropped about 4% in a week. Working backward from 0.0301, it started the week near 0.0314. That lines up with the roughly 0.0315 that CoinMarketCap showed in early October.
Let's try three simple cases. The prices are invented, only to show the logic. Start with bitcoin at $80,000 and ether at $2,400. The ratio is 0.030.
| What happens | Bitcoin | Ether | New ratio |
|---|---|---|---|
| Both fall 10% | $72,000 | $2,160 | 0.030 (no change) |
| Ether falls 10%, bitcoin flat | $80,000 | $2,160 | 0.027 (down) |
| Both rise, ether more | $88,000 (+10%) | $3,120 (+30%) | 0.035 (up) |
Look at the first row. A big drop in both coins did nothing to the ratio. That is the first thing to remember.
The ratio does not say whether prices are going up or down. It only says which coin is doing better.
It is useful for a few simple things:
Context helps. Here are the dated readings we found:
Sources differ slightly on the exact numbers, and trackers use different exchange prices. So expect small gaps. The big picture is clear. The ratio today is far below its 2021 peak.
This part matters most. A ratio is a ratio. It is not a forecast.
If you want to see what makes ether's price behave differently, read our guide to Ethereum layer 2 rollups and how ether's supply changes. These are background reading, not predictions.
Many people watch the ETH/BTC ratio as a mood gauge for the whole crypto market. The logic is that when ether outperforms bitcoin, smaller coins often follow.
We tested a version of this idea in Altcoin Season Isn't a Different Skill. It's Just High Beta to Bitcoin. Beta means how much a coin tends to move when another one moves. Ether usually has a beta above 1 against bitcoin. That means it swings more than bitcoin does, in both directions.
That fits what we saw this week. Ether fell more than twice as far as bitcoin.
You do not need a special chart tool. Open the ETH page in NetWort, then open the BTC page in another tab. Set both to the same time range, such as 1 month.
If the ETH line sits lower than the BTC line by the end, the ratio fell over that period. That is the same ratio, drawn with your own eyes.