Unlike textbook “standard lots,” crypto platforms size trades in base coin, contracts, or USD notional. The same “0.1” on the UI can mean 0.1 ETH on one venue and a different contract multiplier elsewhere. MyCryptoCal calculators use a spot-style USD-quoted model: position in whole or fractional base units for listed pairs—check the tool disclaimer against your product (spot vs perp vs inverse).
Your contract sheet still wins
Copy the official contract spec for symbols you trade: tick size, lot/min size, margin mode (isolated/cross), and P/L currency. Educational calculators cannot know every venue rule.
Size and tick value move together
Doubling position in base units (all else equal) doubles USD sensitivity per tick. That is why sizing usually starts from a risk budget and stop distance in ticks, not from a feeling about the size buttons.
Try the position size calculator after you know your stop in ticks and acceptable risk percent.
Translating the UI into three questions
Instead of memorizing vendor jargon, ask: How many base coins does this click represent?, What notional USD does that imply at this price?, and How does margin mode change liquidation distance? Once those answers are clear, tick value and margin tools become cross-checks instead of guesswork.
Why desks standardize vocabulary
Teams that mix “contracts,” “coins,” and “notional” without a sheet lose time on every P&L dispute. A one-page spec per venue and product class pays for itself quickly.
- Store exchange contract PDFs or screenshots in one folder.
- Mirror naming in your journal CSV headers.
- Revisit specs after listing upgrades or leverage promos.
Practical next step
Pick your three most-traded symbols and write their contract summaries in your own words—you will spot ambiguities faster than by rereading marketing pages alone.