How it works

Two ways to ask “what if”. Here’s an example with ETH and BTC.

Market cap

What if ETH had BTC's market cap?

We give ETH the same market cap as BTC, then divide by the supply used for ETH. NOW uses the current market cap of BTC; ATH uses its historical high.

Peak ratio

What if ETH hit its peak BTC ratio?

We find the highest recorded ETH/BTC price ratio in our available daily history, then apply it to the price of BTC today. This shows what one ETH would cost if it regained that relative strength.

Use the question below your result to flip between the two modes.

What if A had B's market cap?

Select A
Select B

ARB vs WLD market cap comparison

As of Sep 16, 2026, if Arbitrum (ARB) had Worldcoin's (WLD) market cap of $1.33B, one ARB would be worth $0.1992, 1.21x its current price of $0.164.

At Worldcoin's all-time-high market cap of $42.21B (Mar 9, 2024), ARB would be worth $6.32 (38.55x).

Worldcoin is 1.21x the size of Arbitrum by market cap. The rank gap between them is 6 places.

MetricArbitrum (ARB)Worldcoin (WLD)
Price (USD)$0.164$0.3699
Market cap (USD)$1.1B$1.33B
Market cap rank#71#65
Circulating supply6.68B ARB3.6B WLD
24h change+12.54%+1.15%

Price of Arbitrum at Worldcoin's market cap: ($1.33B ÷ $1.1B) × $0.164 = $0.1992.

Questions

What would ARB be worth with Worldcoin's market cap?
Arbitrum (ARB) would be worth $0.1992 per coin with Worldcoin's market cap of $1.33B. That is 1.21x its price of $0.164 on Sep 16, 2026.
How many times would ARB need to grow to reach Worldcoin's market cap?
Arbitrum would need to grow 1.21x. Its market cap is $1.1B and Worldcoin's market cap is $1.33B.
How is the ARB price at WLD's market cap calculated?
Price of Arbitrum at Worldcoin's market cap: ($1.33B ÷ $1.1B) × $0.164 = $0.1992.

Data provided by CoinGecko. Refreshed daily. Last update Sep 16, 2026.