How bill splitter works
Enter the bill subtotal (before tax), the sales tax percentage, the tip percentage, and how many people are splitting. The splitter works out the tax on the subtotal and the tip, then adds them together for the grand total.
By default the tip is calculated on the pre-tax subtotal, which is the most common convention. Turn on "tip on taxed amount" if your group prefers to tip on the post-tax total instead.
The grand total is divided evenly across the number of people, and each person's share of the subtotal, tax, and tip is shown. Change any value and the split recalculates instantly.