Question: how many marriott points do you need for united miles?
Answer: Only Air New Zealand and JetBlue have worse ratios (200:1 and 6:1, respectively). And United Airlines transfers earn a 10% bonus on every transfer. You must transfer at least 3,000 Marriott points at time and there's a cap of 240,000 Marriott points per day (which generally transfers to 100,000 airline miles).