About this tool
The Long Division Calculator is a free, in-browser tool that divides one whole number by another and draws the complete long-division working — the bracket layout with each subtraction, plus a bring-down narrative for every digit. It reports the quotient, the remainder, the decimal value (rounded to 6 decimal places) and the answer as a mixed fraction in lowest terms.
Enter any non-negative whole-number dividend and a positive whole-number divisor and the layout redraws instantly. The bracket notation follows the US/UK convention (divisor ) dividend with the quotient on top); the underlying algorithm is the same one taught worldwide. Everything runs locally in your browser.
Frequently asked questions
How does the long-division algorithm work?
Working left to right, you divide the running value by the divisor, write the quotient digit on top, subtract the product, and bring down the next digit of the dividend to form the next running value — the steps list shows each of these divisions and bring-downs.
What is the remainder and how is it shown as a fraction?
The remainder is what is left after the final subtraction. The fraction form appends remainder/divisor, reduced to lowest terms, to the whole quotient — e.g. 493 ÷ 4 = 123 1/4.
Can I divide decimals or negative numbers?
No — the worked layout is for whole numbers, so the tool accepts a non-negative integer dividend and a positive integer divisor. The decimal tile still shows the quotient as a decimal, rounded to 6 decimal places (e.g. 123.25), for checking decimal answers; the fraction tile carries the exact value.
Why does the layout look different from how I learned it?
The bracket notation shown is the US/UK style. Several countries write the divisor on the right or arrange the subtractions differently, but the digits, products and remainders in the steps are identical in every convention.