Pizza calculator

Round your requested pizza portions up to whole pizzas.

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Privacy details

Pizza calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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People eating

Slices per person

More inputs and assumptions

Slices per pizza

Extra slices wanted

Answer

…

Round your requested pizza portions up to whole pizzas.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Slices needed = people × your chosen slices per person + extra slices. This is order arithmetic, not an appetite or nutrition recommendation. Enter the shop’s actual slice count; pizza diameters and slice sizes are not treated as equivalent.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

Scratch calculator

Check another calculation

Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-09-26

Using Pizza calculator

Round your requested pizza portions up to whole pizzas.

Next: Unit price calculator

A worked example

Example inputs: people eating = 12, slices per person = 3, slices per pizza = 8, extra slices wanted = 0. Whole pizzas to order = 5.

Before you use the result

Example results for people eating

These examples use Slices per person: 3; Slices per pizza: 8; Extra slices wanted: 0. They are reference calculations, not recommended settings.

People eating	Whole pizzas to order
6	3
12	5
24	9

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ToolOctopus. “Pizza calculator.” Updated 2026-09-26. https://tooloctopus.com/pizza-calculator.

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