Need quick, accurate unit conversions? Our Conversion Calculator lets you convert length, weight, temperature, area, volume, speed, data, and time instantly with adjustable precision. It’s designed for students, professionals, and everyday users who want reliable results without the hassle.
Why use this Conversion Calculator?
Whether you are comparing metric and imperial measurements or converting data sizes for a download estimate, a dependable tool saves time and prevents mistakes. This Conversion Calculator combines clarity with accuracy. Choose your conversion type, enter a value, select the source and target units, and you’ll get the answer in a click. You can even choose how many decimal places to display, making it ideal for both quick checks and technical work.
What you can convert
- Length: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
- Weight/Mass: milligrams, grams, kilograms, tonnes, ounces, pounds, and stones.
- Temperature: Celsius, Fahrenheit, and Kelvin with exact formulas (not approximations).
- Area: from square millimeters to hectares and acres.
- Volume: milliliters, liters, cubic meters, and common US measures like cups and gallons.
- Speed: meters per second, kilometers per hour, miles per hour, knots, and feet per second.
- Data: bytes and bits in both decimal (KB, MB, GB, TB) and binary (KiB, MiB, GiB, TiB) standards.
- Time: milliseconds, seconds, minutes, hours, and days.
How to use the calculator
- Select a Conversion type such as Length, Weight, or Temperature.
- Enter the Value you want to convert.
- Choose the From unit and the To unit.
- Optionally set the Decimal precision (0–10) to control rounding.
- Press Convert to see the result instantly.
Accuracy and standards
All linear conversions use precise, current factors aligned with international standards. For instance, 1 inch equals exactly 25.4 millimeters, and 1 mile equals 1609.344 meters. Temperature conversions use correct formulas: Celsius to Fahrenheit, Fahrenheit to Kelvin, and so forth. Data conversions support both decimal (SI) and binary (IEC) prefixes so you can calculate storage and bandwidth accurately.
Practical examples
- Convert a running route from miles to kilometers to match your training plan.
- Switch a recipe from US cups to metric grams and liters.
- Translate engineering specs from inches to millimeters and square feet to square meters.
- Estimate file sizes and transfer times by converting between GB and GiB.
- Check wind speed in knots against mph or km/h for travel and boating.
Tips for best results
For everyday tasks, a precision of 2 is usually enough. For technical drawings or scientific work, increase precision to 4–6 decimals. When converting temperatures, remember that rounding can affect derived values, so choose a precision that suits your application. If you don’t see a change in the result, make sure your From and To units differ and that the selected units match the chosen conversion type.
Fast, flexible, and free
This Conversion Calculator is optimized for speed and usability. It supports a wide range of units, handles edge cases like negative temperatures, and produces clean, readable answers. Bookmark it for daily use—no sign-up, no paywall, just accurate conversions whenever you need them.