Unit Converter

Convert units (length, weight, temperature, etc.)
This free online unit converter runs in your browser and is part of our Converters collection.

🔄 Universal Unit Converter

Convert between metric and imperial units of measurement across length, weight, storage, temperature, and more

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Instant In-Browser Execution Runs locally in JavaScript without wait times or server delays.
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100% Privacy & Security Your inputs and files are never stored or logged on remote servers.
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Cross-Device Responsive Fully optimized for mobile smartphones, tablets, and desktop displays.
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100% Free Forever No subscription fees, no signups, and no software installations.

How to Use the Online Unit Converter

1 Select Unit Category

Choose your measurement domain from the tabs: Length, Weight/Mass, Temperature, Area, Volume, Speed, Time, or Digital Storage.

2 Input Value & Source Unit

Type your number into the "From" input field and select the originating unit (e.g. Kilograms, Pounds, Meters, Feet, Celsius).

3 Select Destination Unit

Choose your target unit from the "To" dropdown to compute the exact scientific conversion factor.

4 Review Instant Conversion & Table

View the converted result, swap units with the "⇄" button, and inspect the quick multi-unit conversion breakdown table.

Frequently Asked Questions

Common questions about using this free online unit converter.

How are conversions calculated to avoid floating-point rounding errors? ▾
Conversions normalize input values to standard SI base units (such as meters for length or grams for mass) before scaling to the target unit, using high-precision decimal rounding.
What temperature scales are supported? ▾
The converter supports Celsius, Fahrenheit, Kelvin, and Rankine, applying exact offset formulas (e.g., °F = (°C × 9/5) + 32; K = °C + 273.15).
What is the difference between Decimal (MB) and Binary (MiB) digital storage units? ▾
Decimal storage (SI standard) uses powers of 10 (1 KB = 1,000 bytes; 1 MB = 1,000,000 bytes). Binary storage (IEC standard) uses powers of 2 (1 KiB = 1,024 bytes; 1 MiB = 1,048,576 bytes). Both are clearly displayed.
Can I convert very large or tiny scientific notation numbers? ▾
Yes. The converter supports exponential scientific notation (e.g. `1.5e-6` or `3.2e9`).

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