Optimism Calculators

2.29 billion OP were in circulation as of 5 August 2026, against a maximum of 4.29 billion — so 53.2% of everything that will ever exist has already been issued, leaving 2.01 billion still to come. That is a large share still to arrive, and it is worth knowing on what schedule before treating the current price as the settled one.

None — OP is used for governance. That is why there is no OP staking calculator here: the tool reports rewards in units of the coin you staked, so it only covers networks that pay in that same asset. Publishing a page where the dollar figure was right and the unit was wrong would be worse than leaving it out.

There are 5 on this page and they answer different questions. Start from what you are actually asking: what a past purchase would be worth now, what a position is worth today, where a leveraged position gets liquidated, or what regular buying would have produced. Each opens with the live OP price already filled in, and every calculation runs in your browser — nothing is sent anywhere and nothing is stored.

Live from CoinGecko when you press the price button, with the OPUSDT pair on Binance as a fallback if that request fails. The request happens in your browser and carries nothing about you; if both fail the calculator keeps working with whatever figure you type in.