Quick Mental Tip Calculation

  1. 1

    Find 10% first (move the decimal)

    10% of any number: move the decimal point one place left. $65.00 → 10% = $6.50. $120.00 → 10% = $12.00. $47.50 → 10% = $4.75. This is your base unit for calculating any tip percentage quickly.

  2. 2

    Scale up from 10%

    15% tip: 10% + half of 10%. On $80: $8 + $4 = $12. 20% tip: 10% doubled. On $80: $8 × 2 = $16. 18% tip: 10% + 5% + 3%. On $80: $8 + $4 + $2.40 = $14.40 (or just approximate $14–15).

Calculator Method (Most Accurate)

Bill amount × tip percentage as a decimal: $65 bill, 18% tip: $65 × 0.18 = $11.70 tip. Total to pay: $65 + $11.70 = $76.70. Or multiply by 1.18 directly: $65 × 1.18 = $76.70. Common tip decimals: 10% = 0.10, 15% = 0.15, 18% = 0.18, 20% = 0.20.

Splitting the Bill With Tip Included

To split a bill including tip equally: add the tip to the total first, then divide by the number of people. $240 bill, 15% tip: $240 × 1.15 = $276 total, divided by 4 people = $69 each. Or use a tip calculator app — most phones have one built into the calculator or easily downloadable.

Tipping in Australia

Unlike the US, tipping is not mandatory in Australia — service staff are paid a minimum wage. Tipping is a gesture of appreciation for exceptional service, not an expected part of the payment. At restaurants: rounding up or leaving 10% for good service is common. At cafes: a tip jar is present but leaving change is optional. Taxis and ride-share: tipping through the app is offered but not expected. Never feel obligated to tip for average or poor service.

Frequently Asked Questions

In Australia, menu prices already include GST (10% tax) so there is no separate tax to account for — tip on the total bill as presented. In countries like the US where tax is added at the register, tipping on the pre-tax subtotal is technically more common though many people tip on the total. For Australian dining, simply tip on the amount shown on your bill.
No — unlike in the United States, tipping is not culturally mandatory in Australia. Not tipping for standard service is completely normal and not considered rude. Australian hospitality workers are paid a minimum wage (around $24–30/hour in 2026 depending on penalties) unlike US tipped workers who may earn below minimum wage. Tip when service has genuinely exceeded expectations or when you want to show appreciation — not out of obligation.