What is long addition?

Adding numbers by stacking them in columns (ones, tens, hundreds, …) and adding column by column with carry.

How many numbers can I add?

Enter as many numbers as you need; separate by comma or newline. The tool sums them all.

Yes. Decimal points are aligned and the sum is computed with decimal precision.

Column addition for multiple numbers. Add several numbers with carry, written in column form (long addition).

Numbers (one per line or comma-separated)

Result

Sum = 1368

What is long addition?: Adding numbers by stacking them in columns (ones, tens, hundreds, …) and adding column by column with carry.
How many numbers can I add?: Enter as many numbers as you need; separate by comma or newline. The tool sums them all.
Does it support decimals?: Yes. Decimal points are aligned and the sum is computed with decimal precision.

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.