There are three honest ways to split a restaurant bill. Even split, item split, and weighted split. Each has a right time. The awkwardness is when a table mixes them.
Even split
Total ÷ people. Used when orders were similar, or when the group prefers social smoothness over precision. At casual dinners it's the default. For a $200 bill among 4 people: $50 each, tax and tip already baked in.
Good for: close groups, similar orders, not wanting to do math.
Bad for: wildly uneven orders, non-drinkers subsidizing drinkers, someone who ordered twice what everyone else did.
Item split
Each person pays for what they ordered. Tax and tip apportioned proportionally. For a bill where Alex ate $25 of food and Ben ate $50, Alex pays 1/3 of the tax+tip and Ben pays 2/3.
Good for: uneven orders, non-drinkers, strict fairness.
Bad for: long itemized math at the table, killing the vibe.
Weighted split
The middle ground. Someone orders dramatically more than the table average → they pay proportionally more. Everyone else evens out. Works well when the obvious outlier offers to pay extra to smooth things.
Good for: mixed situations, one big-appetite friend, someone on a budget who ordered light.
The apportionment math
For item split, the tax+tip allocation formula:
your share = (your items / total items) × (tax + tip)
For a $100 food bill + $8 tax + $20 tip = $128 total, person with $30 of food pays: $30 + (30/100) × ($8 + $20) = $30 + $8.40 = $38.40.
Total + tip % + people count. Calculates the even-split share. For item splits, run per person.