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Both calculators run independently — change the inputs on either side to compare results.

LCM Calculator

Find the least common multiple — the smallest positive integer that two numbers both divide into evenly. It is essential for adding fractions, scheduling repeating events, and aligning cycles.

First Number

Second Number

Fill in the required fields to see your result.

Number Theory

Modular Arithmetic Calculator

Compute modular addition, subtraction, and multiplication instantly. Use it in cryptography, competitive programming, or number theory to keep results within a fixed range.

Number A

Number B

Modulus

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Key differences

	LCM Calculator	Modular Arithmetic Calculator
Category	Number Theory	Number Theory
Inputs required	2	3
Result	Least Common Multiple	(A + B) mod M
What it does	Find the least common multiple — the smallest positive integer that two numbers both divide into evenly. It is essential for adding fractions, scheduling repeating events, and aligning cycles.	Compute modular addition, subtraction, and multiplication instantly. Use it in cryptography, competitive programming, or number theory to keep results within a fixed range.