Unit Converter
Convert between major measurement systems across a wide range of categories and units.
Advanced — 4 decimals · Sig figs off · Standard notation
What is Unit Converter?
A unit converter converts values between different measurement units within the same category—length, area, volume, mass, temperature, speed, time, pressure, energy, power, digital storage, angle, and frequency. ToolCrux supports 13 categories with dozens of units each, from metric and imperial to scientific. All conversions run entirely in your browser with no data sent to any server.
Real-world use cases include converting miles to kilometers for travel, Celsius to Fahrenheit for weather, pounds to kilograms for fitness, bytes to gigabytes for storage, and psi to bar for pressure. Engineers, students, travelers, and DIY enthusiasts rely on it for quick, accurate conversions without memorizing formulas.
How to Use Unit Converter
- Select a category from the dropdown (e.g., Length, Temperature, Digital Storage).
- Choose the From and To units from the unit dropdowns.
- Enter a value in the input field. The converted value and full conversion table update instantly.
- Use Swap to reverse From and To units. Use Use Sample for example values.
- Open Advanced to set precision (2–8 decimals), significant figures, or scientific notation.
Tips & Best Practices
Use Ctrl+Enter to convert, Ctrl+Shift+C to copy the result, and Esc to clear. The table shows all units in the category for the entered value—useful for comparing multiple units at once. For temperature, use the temperature rounding option in Advanced. Digital storage supports both decimal (KB, MB) and binary (KiB, MiB) units. For currency, use our currency converter.
When to Use This Tool
Use the unit converter for any non-currency measurement conversion. Pair it with the percentage calculator for percent-based calculations, or the currency converter for money conversions.
Frequently Asked Questions
What is a unit converter?
A unit converter converts values between different measurement units within the same category—e.g., meters to feet, Celsius to Fahrenheit, or bytes to gigabytes. ToolCrux supports 13 categories and runs in your browser.
How do I convert units?
Select a category (e.g., Length), choose From and To units, enter a value, and click Convert. The table shows equivalent values for all units in that category. Use Swap to reverse the pair.
What categories are supported?
Length, area, volume, mass, temperature, speed, time, pressure, energy, power, digital storage, angle, and frequency. Each category includes common units like metric, imperial, and scientific.
Can I control decimal precision?
Yes. Use the Precision dropdown to choose 2, 4, 6, or 8 decimal places. Use Sample loads example values for the selected category. Try our percentage calculator for percent conversions.
Is the unit converter free?
Yes. The ToolCrux unit converter is free, runs entirely in your browser, and requires no signup. All conversions happen locally—no data is sent to any server.