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Updated October 9, 2026

Volume, Speed and Data Converter

Three converters in one page: volume (milliliters to gallons), speed (m/s to knots) and data size (bits to terabytes). Pick a tab, type an amount, get the answer.

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Volume

Milliliters, liters, US gallons, quarts, pints, US cups and US fluid ounces. The gallon here is the US liquid gallon (3.78541 L); the imperial gallon (4.54609 L) used in the UK is about 20 percent larger, so check which gallon your recipe or manual means.

Speed

Meters per second, kilometers per hour, miles per hour, feet per second and knots. One knot is one nautical mile per hour (1.852 km/h), the standard unit in aviation and shipping.

Data size

Bits, bytes, kilobytes, megabytes, gigabytes and terabytes using decimal (SI) units: 1 KB = 1,000 bytes, 1 MB = 1,000,000 bytes. Operating systems often display sizes in binary units (1 KiB = 1,024 bytes), which is why a drive sold as 1 TB shows about 931 GB in Windows.

Worked examples

2 US cups = 473.176 ml. 60 mph = 96.5606 km/h. 8 GB = 8,000,000,000 bytes.

Planning estimate only. Results use the list prices shown and may differ from your actual bill. Terms

Frequently asked questions

US gallon or imperial gallon?

The US liquid gallon is 3.78541 liters; the imperial gallon is 4.54609 liters. This converter uses the US gallon, the one in American recipes and fuel economy figures.

What is a knot?

One nautical mile per hour, or 1.852 km/h. It is the standard speed unit in aviation and maritime navigation.

Is a kilobyte 1,000 or 1,024 bytes?

Decimal: 1 KB = 1,000 bytes here, following SI and storage-industry convention. Binary KiB (1,024 bytes) is what operating systems often display.

What is the difference between liters and cups?

Liters, the metric unit used almost everywhere outside the US. Cups and fluid ounces are US customary units common in American recipes.

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