Arbitrum Market Cap Calculator
Calculate Arbitrum (ARB) market cap from the live ARB price and circulating supply — plus FDV, and the price ARB would need to reach any target valuation.
Result
Enter values to see the result.
Using the Arbitrum Market Cap Calculator
Market cap is simply the live ARB price multiplied by the number of coins in circulation, and this page does that with the current price loaded for you. The supply field starts at roughly 6.61 billion ARB, which is where it stood on 5 August 2026 — supply moves, so check it against a market data source if you need an exact figure, and edit the field.
Arbitrum's supply is bounded at 10 billion ARB, so the fully diluted valuation is a real ceiling rather than an open-ended one. The MC/FDV row shows how much of that supply is already trading: the closer it is to 100%, the less future dilution is waiting for you, and for ARB that gap is currently 66%.
The comparison field answers the question people actually come here for: what would ARB be worth at some other valuation? Enter a target market cap and the calculator returns the implied ARB price and the multiple from here. It is arithmetic, not a forecast — reaching a larger cap means absorbing every holder willing to sell on the way, and aRB has been under near-constant unlock pressure since launch, and trades on rollup competition and on Ethereum's own fee narrative.
Arbitrum at a glance
- Launched
- Chain August 2021; ARB token March 2023
- Type
- Optimistic rollup settling to Ethereum
- Max supply
- 10,000,000,000 ARB
- Gas token
- ETH — not ARB
- Withdrawals
- ~7-day challenge window for trustless exits to Ethereum
- Native staking
- None — ARB is used for governance
Frequently asked questions
- What is Arbitrum's market cap?
- Multiply the live ARB price by the circulating supply — around 6.61 billion ARB as of 5 August 2026. The calculator above loads the current price and does this for you; the result updates the moment you change either field.
- How do I calculate the ARB price at a given market cap?
- Divide the target market cap by the circulating supply. The comparison field above does it directly and also shows the multiple against today's ARB price, which is usually the more sobering number.
- What is Arbitrum's fully diluted valuation?
- FDV prices all 10 billion ARB at the current price, including coins not yet circulating. The difference between FDV and market cap is the supply still to enter the market — worth knowing before you treat market cap as the whole picture.
- How do you calculate crypto market cap?
- Market cap = current price × circulating supply. A coin at $2 with 500 million coins in circulation has a $1 billion market cap. Note that it is circulating supply, not total supply — tokens still locked in vesting contracts or a treasury are excluded.
- What is the difference between market cap and FDV?
- Market cap uses only the coins in circulation today. Fully diluted valuation (FDV) prices every coin that will ever exist, including locked and unminted supply. A project with a $200M market cap but a $2B FDV has 90% of its supply still to hit the market.
More ARB calculators
Free Arbitrum (ARB) profit calculator. Enter your buy and sell price to see ARB profit, loss, ROI and fees — prefilled with the live ARB price.
Free Arbitrum (ARB) dollar-cost-averaging calculator. Model recurring ARB buys to see coins accumulated, average entry and portfolio value at today's live price.
Work out your weighted average Arbitrum (ARB) entry price across multiple buys — and see exactly where your break-even sits.
Find the exact Arbitrum (ARB) price that liquidates your leveraged position. Prefilled with the live ARB price — set your leverage and direction.
Prefer the generic version without ARB presets? Open the Crypto Market Cap Calculator.
For educational purposes only. Rates, fees and protocol parameters change — verify current figures with your exchange or validator before acting. Not financial advice.