Bitstairs tools

Last checked: July 2026

Five small calculators, run entirely in your browser. Put in your own numbers before you put in real money.

Most people open an exchange, type in an amount, and hit buy — then find out afterward what the fee was, or how far the trade could move against them before it hurt. That's backwards. Every number below is one you can check before you click anything, using the same math OKX (or CoinGecko, for the EUR/RON tool) publishes, not a marketing estimate.

None of these send your inputs anywhere. Everything below runs as plain JavaScript in this page — no account, no tracking, no server round-trip except the one live price fetch on the EUR/RON converter. Change a number and the result updates immediately.

They exist because "know your numbers first" is the one habit that separates a boring, sustainable trading routine from an expensive lesson. A fee calculator tells you what a rebate is actually worth to your trade size, not a generic percentage. A position-size calculator forces you to decide how much you can lose before you decide how much to buy. A DCA planner turns a vague "I'll buy some every month" into an actual schedule with a total attached. None of that requires OKX-specific knowledge — it's arithmetic, applied honestly, before the trade instead of after it.