How to use: Calculate appropriate tips and split bills fairly among groups. Enter Bill Amount (total before tip), select Tip Percentage (US standards: 15% adequate service, 18% good service, 20% excellent service, 22-25% exceptional service), and Number of People splitting the bill. Results show: Tip Amount to leave, Total Amount including tip, and amount Per Person when splitting. Tipping customs vary by country and service type. Bartenders typically receive $1-2 per drink or 15-20% of tab. Delivery drivers 15-20% with $3-5 minimum. Use for dining out, group dinners, delivery orders, and service payments.