Tip Calculator & Bill Split

India tipping culture is informal and tip is genuinely optional. Common rates: 5-10% at casual dining, 10-15% at upscale restaurants, ₹50-100 flat tip for delivery drivers, 5-10% on cab fares (rounding up to next ₹100 also works). Service charge (typically 5-10%) is now flagged as 'optional' by the Department of Consumer Affairs — you can request its removal, especially if service was poor.

USA tipping culture is mandatory: 15-20% on the pre-tax bill at full-service restaurants, 18-25% at upscale or for exceptional service. US servers are often paid below minimum wage with the expectation that tips bridge the gap. Not tipping in the US is considered a form of stiffing the worker, not a comment on service quality.

International dining etiquette varies widely: Japan (no tipping), Europe (10% if service charge isn't included), Middle East (10-15%), Australia (10% optional). Always check local norms — over-tipping is rarely a problem; under-tipping in mandatory-tip cultures is rude.

Default behavior: tip is calculated on the pre-tax bill amount (matching US convention). Toggle 'Include tax in tip base' if you prefer to tip on the post-tax amount — common in India where the service-included bill is what most people see.

Total bill = pre-tax amount + tax + tip. Per-person = total ÷ number of people. The split assumes equal sharing — for uneven splits (e.g., one person had drinks and others didn't), calculate each person's pre-tip share, then add their proportional share of the tip.

Quick math heuristic for tipping: 10% = move the decimal one place left. 15% = 10% + half of 10%. 20% = double the 10%. Examples: ₹2,500 bill → 10% = ₹250 → 15% = ₹375 → 20% = ₹500.