Net worth is addition of assets minus all debts.
Example (these are made up numbers):
Assets:
Checking: $300
Savings: $1,500
Money Market $ 10,000
Home: $250,000 (many people use Zillow's Zestimate. I use the zestimate minus selling fees of 7%)
401k: $60,000
Car: <I don't include cars as assets, have at it if you want to>
Total Assets: $321,800
Liabilities:
Student Loan: $25,000
Car Loan: $10,000
Mortgage Loan: $200,000
CC Debt: $4,000
Total Liabilities: $239,000
Net worth = Assets - Liabilities = $321,800 - $239,000 = $82,800
People often track something else in the race threads. Some to liquid assets only, some to taxable investments only, others do NW...track what makes sense to you and motivates you to stay on track!