Unit converter. Convert length, weight, temperature, area, volume, speed, and time units with precision control and smart detection.
100% browser-based — your data never leaves your device
Convert length, weight, temperature, area, and volume units.
Choose from length, weight, temperature, area, volume, speed, or time.
Type the value you want to convert, optionally with the unit for smart detection.
Select the unit to convert from and the unit to convert to. The result updates in real-time.
Ctrl+Enter to convert
Convert length, weight, temperature, area, and volume units.
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Unit Converter is a free online math tool that convert length, weight, temperature, area, and volume units. It works entirely in your browser — no downloads, no installations, and no server uploads required. engineers, data scientists, students use Unit Converter when they need a fast, privacy-respecting way to process math data without installing additional software. It supports capabilities such as multiple categories, precision control, smart detection. Additional features include favorite units. Common use cases include converting measurement units in engineering and scientific calculations, converting between metric and imperial units for international projects, quick temperature, length, and weight conversions for everyday use. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes Unit Converter ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
Unit Converter is a free online math tool that helps you convert length, weight, temperature, area, and volume units. Key capabilities include multiple categories, precision control, smart detection. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to converting measurement units in engineering and scientific calculations.
Choose from length, weight, temperature, area, volume, speed, or time.
Type the value you want to convert, optionally with the unit for smart detection.
Select the unit to convert from and the unit to convert to. The result updates in real-time.
| Category | Details |
|---|---|
| Input Limits | Numeric precision: 64-bit IEEE 754 (double) |
| Result precision: Up to 16 significant digits | |
| Supported Formats | Decimal, Hexadecimal, Binary, Octal, Scientific notation |
| Browser Engine |
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All operations run entirely in your browser using built-in Math APIs. No server uploads, no data storage, and no third-party requests.
Unit Converter is ideal when you need to converting measurement units in engineering and scientific calculations without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For one-off tasks and quick processing, Unit Converter is faster than setting up a local development environment or using a command-line tool.
No. Unit Converter processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
The converter supports length, weight, temperature, area, volume, speed, and time units — over 100 individual units across all categories.
Yes. Celsius, Fahrenheit, and Kelvin are all supported with accurate conversion formulas.
Length, weight, temperature, area, volume, speed, time, and more.
Adjust decimal places for precise scientific conversions.
Paste a value with a unit and the tool auto-detects the category.
Save frequently used unit pairs for quick access.
Unit Converter is useful in a variety of scenarios across different workflows:
Converting measurement units in engineering and scientific calculations
Converting between metric and imperial units for international projects
Quick temperature, length, and weight conversions for everyday use
Paste values with units like '100kg' or '5.5ft' to auto-detect the category instead of manually selecting from dropdowns.
Save frequently used unit pairs like inches→cm or °F→°C as favorites for one-click access.
Explore more tools in the Math workspace:
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal number systems.
Percentage Calculator
Calculate percentages easily with three common modes.
Chmod Calculator
Convert Unix file permissions between numeric and symbolic formats.
Random Number Generator
Generate cryptographically secure random numbers with custom ranges and count.
Scientific Calculator
Perform scientific calculations with trigonometric, logarithmic, and exponential functions.