Frequently Asked Questions

It performs exact arithmetic on large integers and supports decimals through exact fractions. Integer answers retain their digits, while rounded decimal and scientific displays are labelled.

Integer results are exact. Addition, subtraction, multiplication, powers, modulo, factorial, GCD, LCM, quotients, remainders and fractions are computed with exact integer arithmetic. Only the optional decimal and scientific views are rounded, and they are clearly labelled as such.

Yes. You can paste numbers with thousands or tens of thousands of digits. Each box shows a live digit count, and long results are shown as a preview that you can expand, copy or download in full.

Decimal input is limited to 200,000 significant digits, with scientific-notation expansion checked against the input limit. Other formats and operations have additional size or workload checks. The result-size safeguard uses a two-million-digit threshold, and factorial input is limited to 50,000. Runtime and memory use depend on your device.

Yes. Multiplication is exact for any inputs within the limits above. For example, 999999999999999999 × 999999999999999999 returns all 36 digits of the product.

Yes. Division shows the integer quotient, the remainder and the exact reduced fraction. You can also view a decimal value rounded to between 5 and 500 places. Dividing by zero shows a helpful error instead of a result.

Yes. Add a minus sign before a number. Quotients are rounded toward zero, and remainders and modulo results take the sign of the first number, so −7 mod 3 is −1. GCD and LCM always return non-negative values.

Yes. Powers require a non-negative whole-number exponent and must pass exponent and estimated-size checks. Factorials work for whole numbers from 0 to 50,000. Long jobs run in the background and can be cancelled.

Yes. Choose from 19 languages in the result-word selector and copy the displayed words. English uses the short scale, for example 1000000000000 is one trillion. Word output is limited to 3,003 integer digits. Supported names vary by language; when a name is unavailable, exact digits are read individually and clearly labelled. Fractional words show the first 100 decimal places.

Yes. Square root returns the exact integer square root rounded down, and the nCr and nPr buttons compute combinations and permutations exactly, such as C(52, 5) = 2,598,960.

Yes. Type decimals like 3.14, scientific notation like 3.5e19, or hexadecimal like 0xFF (binary 0b and octal 0o also work). Decimals are kept as exact fractions, so 0.1 + 0.2 is exactly 0.3.

Yes. AND, OR, XOR, shift left (<<) and shift right (>>) work on whole numbers within the input and workload limits, including hex input. Negative numbers follow two's-complement rules.

Arithmetic runs in your browser; the calculator does not submit inputs or results to a calculation service. History is kept in memory unless you choose to save it on this device. Website analytics and hosting requests are separate from calculation processing; see the Privacy Policy.

Yes. It is completely free to use, with no sign-up, account or download required.

Yes. The default view shows every digit of an integer result. Scientific notation appears only if you choose it, and the comma option groups digits in threes for easier reading.

Yes. Use your browser zoom (Ctrl and + on Windows, Command and + on a Mac, or pinch on a phone). The layout adapts, and dark mode can reduce glare.