1 oXTZ is always equal to 1 XTZ. Make sure to always exchange your oXTZ/XTZ directly through the objkt.com UI.
oXTZ (objkt XTZ) is a form of wrapped XTZ (or tez) the native currency of the Tezos blockchain. oXTZ is always exchangeable at a 1 to 1 ratio for XTZ. The easiest and best way to exchange oXTZ for XTZ is directly through the objkt.com UI.
Click on the wallet icon to show the balances, here we see 3.00oXTZ.
Clicking on "Exchange" brings up a form, the up/down arrow lets you switch the direction of the conversion: XTZ to oXTZ or oXTZ to XTZ. Here we see 3.00oXTZ about to be unwrapped to XTZ, after this operation the user will have 14.97 XTZ and 0 oXTZ.