Tip Percentage Finder

Reverse-tip calculator: enter the bill and the tip you left, get the implied tip %.

Result

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How to use this calculator

Enter the bill amount EXACTLY as it appears on the receipt (subtotal line for US standard).
Enter the tip line from the receipt (or compute it as total − subtotal).
If your receipt shows tax-inclusive subtotal, switch the "How is bill measured" dropdown to match.
Compare your % to the 15 / 18 / 20% reference lines below — the calculator shows whether you were over or under each band.

About this calculator

Restaurant-receipt analysis: you already paid the tip, you want to know what percentage that worked out to. Standard US tipping benchmarks are baked in for comparison (15 / 18 / 20 / 22 / 25%). Pick the right "base" mode: most US servers tip on the pre-tax subtotal, but if your receipt shows tax-inclusive subtotal (some POS systems) or you entered a total that already includes the tip, switch modes. The result includes the implied percent to 2 decimals plus an etiquette-band label calibrated to the US Emily-Post-Institute convention (15-20% for sit-down service).

Frequently asked

Should I tip on the pre-tax subtotal or the post-tax total?+

US Emily-Post-Institute etiquette guidance: tip on pre-tax subtotal — that's what the service is for. Some servers prefer the post-tax total (it's ~6-10% more depending on state tax). Both are defensible; the calculator handles either via the mode dropdown.

What is the standard US tip for sit-down service?+

Emily Post / Bureau of Labor Statistics conventions: 15-20% for sit-down restaurant service. Below 15% signals dissatisfaction; above 20% signals generosity or unusually good service. 18% is the modern default in many US cities.

Does this work outside the US?+

The math does, but the etiquette band is US-calibrated. UK/Europe is typically 0-10% (service often included). Japan tipping is rare to insulting. Use the percentage output, ignore the etiquette band.

What if I rounded up to a whole-dollar amount?+

The calculator returns the exact % even for awkward amounts ($5 tip on $26.40 bill = 18.94%). Most rounding-up creates slightly above-band tips, not below.

Want to go the other way — compute tip from %?+

Use the Tip Calculator. This one is the inverse: you already paid the tip, you want to know the implied %.