How does bidirectional conversion work?

Both input fields are live — typing in either field instantly updates the other. No calculate button is required.

What does the all-units panel show?

The all-units panel shows the entered value converted into every unit in the selected category simultaneously.

What is the binary toggle for data units?

Binary mode uses 1024-based prefixes (KiB, MiB, GiB) as used by operating systems. Decimal mode uses 1000-based prefixes (KB, MB, GB) as used by storage manufacturers.

How is temperature converted?

Temperature uses formulas: °F = (°C × 9/5) + 32, K = °C + 273.15. The converter handles all three directions.

Converters

Unit converter

Instantly convert between units in 9 categories. Select a category from the tab strip, type in either field for live bidirectional conversion, tap swap to reverse, and see every unit in the category at once in the all-units panel.

9 category tabs Bidirectional live input All-units output panel Animated swap button Binary/decimal toggle Quick reference cards

Unit Converter

Live · Bidirectional · All-units panel

From

Results update live as you type in either field. The all-units panel shows every unit in the category simultaneously.

Quick Reference: Common Conversions

The most frequently searched conversion factors, organised by category. Each card shows the 3 most useful base conversions.

Metric vs Imperial: A Brief Guide

The metric system (SI) is used by the vast majority of countries and is the standard in science and industry. It is a decimal system — every unit is a power of 10 of the base unit (e.g. 1 km = 1,000 m, 1 kg = 1,000 g). Imperial and US customary units are still widely used in the United States and partially in the UK, with less intuitive conversion factors (e.g. 1 mile = 1,760 yards = 5,280 feet).

For data units, two systems coexist: decimal (1 KB = 1,000 bytes, used by storage manufacturers) and binary (1 KiB = 1,024 bytes, used by operating systems). The binary toggle in the Data and Data Transfer categories switches between these two systems.

For temperature, conversions are not multiplicative — they use formulas: °F = (°C × 9/5) + 32, and K = °C + 273.15.

Frequently Asked Questions

Both input fields are live — type in the From field to update the To field, or type directly in the To field to update the From field. There is no calculate button; results update on every keystroke.

When you enter a value, the all-units panel shows that value converted into every unit in the selected category simultaneously. This lets you compare magnitudes at a glance — for example, seeing 1 mile expressed as metres, km, feet, yards, and inches all at once.

In the decimal system (off), 1 KB = 1,000 bytes, 1 MB = 1,000 KB. In the binary system (on), 1 KiB = 1,024 bytes, 1 MiB = 1,024 KiB. Storage manufacturers use decimal; operating systems typically report binary values — which is why a 1 TB drive shows as ~931 GiB in Windows.

Temperature uses formulas, not simple multiplication: °F = (°C × 9/5) + 32, °C = (°F − 32) × 5/9, K = °C + 273.15. The converter handles all three directions correctly, including Kelvin to Fahrenheit.

Some units have definitions that vary by country or historical period (e.g. the US fluid ounce ≠ the UK fluid ounce, and the UK ton ≠ the US ton). This converter uses the most common international definitions. For scientific or legal accuracy, always verify the specific definition required.

The converter includes 9 categories with a combined 80+ unit options: Length (12), Weight (10), Volume (12), Temperature (3), Area (10), Speed (8), Pressure (8), Data (10), Data Transfer (10). The all-units panel shows all available units in the selected category simultaneously.

People Also Search For

Length converter Temperature converter Area converter Volume converter Pressure converter Data converter All converters Percentage calculator

Unit converter

Unit Converter

Quick Reference: Common Conversions

Metric vs Imperial: A Brief Guide

Frequently Asked Questions

People Also Search For

Unit Converters

Unit Converter

Dedicated Converters in This Cluster

Frequently Used Together