Equal does not mean automatic. Contributions made before the marriage, an inheritance kept separate, or debts attached specifically to one spouse can all adjust the final number away from a straight even split, which is why the actual math is usually worked out with a lawyer rather than assumed.
The sale price itself needs to be accurate before any split calculation matters, since a home priced off an online estimate rather than recent comparable sales can leave both spouses splitting the wrong number in either direction.
Getting that number right first, then applying the legal split second, is the order that avoids disputes later. Get your hand-reviewed valuation from Joel Dyck.