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RektCalc Chrome Extension — Crypto Risk in One Click
Check your liquidation price and safe position size without leaving the page you are on. The RektCalc extension puts the two calculations that keep you from getting liquidated one click away in your browser toolbar.
Liquidation price
Enter price, leverage and direction — get the liquidation price and how far it is from entry.
Position size
Risk-based sizing from your account, risk %, stop and leverage — never oversize a trade again.
Exchange-accurate
Uses realistic maintenance-margin rates so the numbers match Bybit/Binance/OKX.
Private by design
No sign-up, no account, no tracking — every calculation runs locally in your browser.
Frequently asked questions
Is the RektCalc extension free?
Yes, completely free with no account required.
Does it collect my data?
No. All math runs locally in the popup; nothing is sent to any server and no page content is read.
How do I install it?
Click "Add to Chrome" above, then pin the icon to your toolbar. Click it any time to calculate.
Prefer the web version?
Everything the extension does is also on the site:
Full liquidation calculator →Position size calculator →Learn the concepts →