# Binary adder

World's simplest binary tool
Free online binary sum calculator. Just load your binary values and they will automatically get added together. There are no ads, popups or nonsense, just an awesome binary adder. Load binary values – get a binary sum. Created for developers by developers from team Browserling.

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## What is a binary adder?

learn more about this tool
This utility calculates the sum of binary numbers in your browser. You can input as many binary numbers as you like. By default, numbers can be entered one per line but if your numbers are separated by another symbol, then you can adjust it in the input settings options. The input numbers can be of any length but they can only contain 0's and 1's. The length of the output sum can be changed via the output padding option. You can also add a binary prefix or postfix indicator to the output number and display the decimal value of the binary number in parentheses next to it. If you're adding several binary numbers at once, you can use the option that displays their progressive summation. Simple and easy!

## Binary adder examples

Click to useAdd Two Binary Numbers

This example adds together two nine-digit binary numbers. The result overflows and you get a ten-digit number as their sum.

111111111
000000001

1000000000

**Required options**

Specify the character to split
the input binary numbers.

Output padding length – add
zeros before the binary.

Display binary number's
decimal value next to it.

If multiple numbers are being
summed, then output their
partial sum.

Sum Many Binary Numbers

This example calculates the sum of a bunch of binary numbers. They are entered as a comma-separated list, so we adjust the input delimiter to be the comma character. We also set the desired output length to be 8 and add a lowercase binary prefix "0b" before the output.

0001, 0001, 0001, 0001, 0001, 0001, 0001, 0001

0b00001000

**Required options**

Specify the character to split
the input binary numbers.

Output padding length – add
zeros before the binary.

Display binary number's
decimal value next to it.

If multiple numbers are being
summed, then output their
partial sum.

Running Binary Sum

In this example, we wanted to see how the sum progresses as we sum the first ten binary numbers. To do that, we activated the option "Print Running Sum", which displays all partial sums of the addition process as it happens. As you can see, the first partial sum is 1, the second is 3 (1+2), the third is 6 (1+2+3), etc. We also specified the output padding length of 10, added a subscript binary postfix "₂", and printed decimal values next to binary numbers so that we knew what was happening at each step.

1
10
11
100
101
110
111
1000
1001
1010

0000000001₂ (1)
0000000011₂ (3)
0000000110₂ (6)
0000001010₂ (10)
0000001111₂ (15)
0000010101₂ (21)
0000011100₂ (28)
0000100100₂ (36)
0000101101₂ (45)
0000110111₂ (55)

**Required options**

Specify the character to split
the input binary numbers.

Output padding length – add
zeros before the binary.

Display binary number's
decimal value next to it.

If multiple numbers are being
summed, then output their
partial sum.

Pro tips
Master online binary tools

You can pass input to this tool via

__?input__query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlinebinarytools.com/add-binary-numbers

__?input__=111111111%0A000000001&input-separator=%5Cn&padding-length=0&prefix=without-prefix&running-sum=false&show-decimal=false
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