# All In One Calculator

> Free, fast, privacy-focused online unit converter with over 78 converter categories and 1,600+ units. Performs instant calculations in the browser with zero tracking and no sign-up required.

## Overview

All In One Calculator provides precise mathematical conversions for physical quantities, engineering units, thermodynamics, fluid dynamics, electricity, magnetism, radiology, computer data storage, and number bases.

## Core Converters

- [Length Converter](https://www.allinonecalculator.com/convert/length): Convert meter, kilometer, centimeter, millimeter, micrometer, nanometer, mile, yard, foot, inch, light year, and astronomical units.
- [Weight and Mass Converter](https://www.allinonecalculator.com/convert/weight-and-mass): Convert kilogram, gram, milligram, metric ton, pound, ounce, carat, stone, and atomic mass unit.
- [Temperature Converter](https://www.allinonecalculator.com/convert/temperature): Convert Celsius, Fahrenheit, Kelvin, Rankine, and Reaumur with exact formulas.
- [Volume Converter](https://www.allinonecalculator.com/convert/volume): Convert cubic meter, liter, milliliter, gallon, quart, pint, cup, tablespoon, teaspoon, cubic foot, and cubic inch.
- [Area Converter](https://www.allinonecalculator.com/convert/area): Convert square meter, square kilometer, hectare, acre, square foot, square inch, and square yard.
- [Time Converter](https://www.allinonecalculator.com/convert/time): Convert second, millisecond, microsecond, minute, hour, day, week, month, year, decade, and century.
- [Speed Converter](https://www.allinonecalculator.com/convert/speed): Convert meter per second, kilometer per hour, mile per hour, knot, Mach, and speed of light.
- [Data Storage Converter](https://www.allinonecalculator.com/convert/data-storage): Convert bit, byte, kilobyte, megabyte, gigabyte, terabyte, and petabyte.

## Engineering and Science Converters

- [Pressure Converter](https://www.allinonecalculator.com/convert/pressure): Convert pascal, bar, psi, atmosphere, torr, and standard technical units.
- [Power Converter](https://www.allinonecalculator.com/convert/power): Convert watt, kilowatt, megawatt, horsepower, and metric horsepower.
- [Energy and Work Converter](https://www.allinonecalculator.com/convert/energy): Convert joule, kilojoule, calorie, kilocalorie, watt-hour, kilowatt-hour, and BTU.
- [Force Converter](https://www.allinonecalculator.com/convert/force): Convert newton, kilonewton, dyne, pound-force, and kilogram-force.
- [Number Base Converter](https://www.allinonecalculator.com/convert/number-base): Convert Binary (Base 2), Octal (Base 8), Decimal (Base 10), Hexadecimal (Base 16), and arbitrary bases up to Base 36.

## Site Navigation and Sitemaps

- [All Unit Converters](https://www.allinonecalculator.com/converters): Complete index of all 78 converter categories across 9 scientific disciplines.
- [HTML Sitemap](https://www.allinonecalculator.com/html-sitemap): Human and crawler accessible HTML sitemap indexing all site pages and conversion tools.
- [XML Sitemap](https://www.allinonecalculator.com/sitemap.xml): Machine-readable XML sitemap index for search engines.

## Optional

- [Complete LLM Guide](https://www.allinonecalculator.com/llms-full.txt)