Technology

Tech calculator

Binary, decimal and hexadecimal, download time, bitrate, resolution, screen size, DPI and PPI, frequency and electric power. Bit and byte are treated as different units, and decimal storage (kB) is never confused with binary (KiB).

8 functionsTechnology and Computing

Tech calculator

8 functions

Result

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Decimal value

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Digits

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Fill in the fields and the result appears as you type.

Binary, decimal and hex

Fill in the fields and the result appears as you type.

Number

From base

To base

Result

Fill in the fields and the result appears as you type.

Binary, decimal and hex

Function guide

What it does: Converts numbers between bases 2, 8, 10 and 16, and any base from 2 to 16.
What it is for: For reading a MAC address, a subnet mask, a hexadecimal colour, file permissions and binary data.
When to use it: Use it when the number is already in a known base. A digit that does not exist in the source base is refused — '2' is not binary.
What to fill in: The value, the source base and the target base. Bases from 2 to 16 are accepted; the value is read case-insensitively.
Formula: The value is read position by position in the source base into an integer, then written in the target base by successive divisions.
What each result means: The number in the target base, in uppercase, the decimal value and how many digits it has. Leading zeros are not preserved because they do not change the value.
Worked example: 1010 in binary is 10 in decimal; FF in hexadecimal is 11111111 in binary, which is 255 in decimal.

Each calculation's assumptions are in the function guide — no constant stays hidden.

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