10 Tools

Math & Calculators

Free online math tools and calculators for quick conversions, percentages, aspect ratios, and financial calculations.

Finance

Percentage Calculator

Calculate percentages: X% of Y, what % is X of Y, percentage increase/decrease.

Discount Calculator

Calculate the final price after applying a percentage discount.

Margin Calculator

Calculate gross margin percentage from cost and revenue.

Design

Aspect Ratio Calculator

Calculate missing dimensions for a specific aspect ratio.

Developer

Base Converter

Convert numbers between Binary, Octal, Decimal, and Hexadecimal.

Conversion

Roman Numeral Converter

Convert Arabic numbers to Roman numerals and vice versa.

Math

Prime Number Checker

Check if a number is prime and find its prime factors.

LCM & GCD Calculator

Calculate the Least Common Multiple (LCM) and Greatest Common Divisor (GCD) of numbers.

Basic Text Calculator

Evaluate simple math expressions directly from text.

Generators

Random Number Generator

Generate random numbers between a specified range.

Frequently Asked Questions

Are these calculators accurate?

Yes, our calculators use standard Javascript high-precision math to ensure accuracy for everyday tasks.