Binary calculator

Calculate with signed binary whole numbers and see the exact binary and decimal results.

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Binary 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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First binary integer

Second binary integer

More inputs and assumptions

Operation

Answer

…

Calculate with signed binary whole numbers and see the exact binary and decimal results.

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

Negative values use an explicit minus sign, not a fixed-width two’s-complement encoding. Integer division truncates toward zero; remainder has the dividend’s sign. Input is bounded to 1,000 bits.

Whole-number and finite-decimal arithmetic is exact within the stated input limits. Any requested rounding uses the selected setting. 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.

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Updated 2026-09-20

Using Binary calculator

Calculate with signed binary whole numbers and see the exact binary and decimal results.

Negative values use an explicit minus sign, not a fixed-width two’s-complement encoding. Integer division truncates toward zero; remainder has the dividend’s sign. Input is bounded to 1,000 bits.

Next: Big number calculator

A worked example

Example inputs: first binary integer = 1010, second binary integer = 11, operation = 0. Binary result = 1101.

Before you use the result

Negative values use an explicit minus sign, not a fixed-width two’s-complement encoding. Integer division truncates toward zero; remainder has the dividend’s sign. Input is bounded to 1,000 bits. Whole-number and finite-decimal arithmetic is exact within the stated input limits. Any requested rounding uses the selected setting.

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