Is there a calculator to work out liquidation values for leveraged future trades?

I’d like to base this on my entry price, margin and leverage. I’ve found some formulas online but then when applying them to my current position, it’s not correct but I can’t seem to work out why.

I’m planning on trading with a larger sum of money next year but currently doing tiny transactions to try and learn but I can’t seem to work this part out. I’ve figured the rest out and understand the process (and the risks) but I’d like to be able to make sure I can accurately calculate any liquidation prices on trades before I press go.

I’ve searched on Reddit but couldn’t find this. Apologies if it’s been asked multiple times.