Binary: 1 KB = 1024 bytes (KiB style). Decimal: 1 KB = 1000 bytes (SI). Storage often uses decimal for marketing; RAM and many OS tools use binary.

What units are supported?

Bytes, KB, MB, GB, TB, PB in both binary (KiB, MiB, …) and decimal (kB, MB, …) conventions.

Online Computer Storage Converter

Convert between bytes, KB, MB, GB, TB, and PB. Use binary (1024) or decimal (1000) units. Client-side only.

Unit typeFrom unitValue

Binary vs decimal?: Binary: 1 KB = 1024 bytes (KiB style). Decimal: 1 KB = 1000 bytes (SI). Storage often uses decimal for marketing; RAM and many OS tools use binary.
What units are supported?: Bytes, KB, MB, GB, TB, PB in both binary (KiB, MiB, …) and decimal (kB, MB, …) conventions.

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Free temperature converter.

Tip Calculator

Calculate tip and split the bill. Enter bill amount, tip percentage, and number of people.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals to numbers. Supports 1–3999.

Combinations Calculator

Calculate C(n,r) — the number of ways to choose r items from n without order. Uses n!/(r!(n-r)!).

Combinations with Replacement Calculator

Calculate the number of ways to choose r items from n with repetition allowed. Formula: C(n+r-1, r).

Even Permutations Calculator

Count how many permutations of n objects are even (expressible as an even number of swaps). For n ≥ 2, equals n!/2.