Toolskit

Unit Converter

Convert length, weight, temperature, area, volume, speed, and data in one compact tool.

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About this tool

Instead of seven separate converters, this one tool covers the units you reach for most: length, weight, temperature, area, volume, speed, and data. Pick a category, choose your units, and the result updates as you type.

Temperature uses exact offset formulas rather than ratios, and data units are binary (1024-based) — the details that sloppy converters get wrong.

How to use

  1. Pick a category: length, weight, temperature, area, volume, speed, or data.
  2. Enter the value and choose the from/to units.
  3. Use the swap button to reverse the conversion instantly.

Frequently asked questions

Percentage Calculator

Find X% of Y, what percent X is of Y, and percentage change — free and instant.

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Percentage Increase Calculator

Enter old and new values to get the percentage increase plus the raw difference.

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Percentage Decrease Calculator

Compute the percentage decrease between two values with the exact difference shown.

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Age Calculator

Enter your date of birth to get your exact age in years, months, days — plus your next birthday.

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Date Difference Calculator

Pick two dates to see the gap in days, weeks, months, and years.

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BMI Calculator

Enter height and weight (metric or imperial) for your BMI, category, and healthy range.

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