Unit Converter: Length, Weight, Volume, Area, Temperature and Speed

Choose a category, enter a value and pick the units. The result updates instantly and also shows the conversion factor both ways, including Indian land units such as cent, ground and acre.

FreeNo sign-upRuns in your browserUpdated 2 Nov 2026
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Estimates only. Check important results before you rely on them.

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How to use this calculator

  1. Choose a category such as length or area.
  2. Enter the value you want to convert.
  3. Pick the unit to convert from and the unit to convert to.
  4. Read the result and the conversion factor.

The formula

Result = Value × (Factor of the From unit ÷ Factor of the To unit), where each factor is the size of the unit in a base unit (metre, kilogram, litre, square metre or metre per second). Temperature uses °F = °C × 9/5 + 32 and K = °C + 273.15.

Worked example

10 km = 10 × 1,000 ÷ 1,609.344 = 6.2137 miles. 70 kg = 154.32 pounds. 100 °C = 212 °F. 1 acre = 100 cent = 43,560 sq ft.

Understanding your result

The "1 unit =" lines give the exact factor in both directions, so you can reuse them in your own working. Results show up to six decimal places.

When to use it

  • Convert recipe, travel and shopping units.
  • Move between metric and imperial in study or work.
  • Convert land area in cent, ground and acre for property.

Assumptions and limits

US customary volume units are used for cup, gallon, tsp and tbsp. One ground is taken as 2,400 sq ft and one cent as 1/100 acre, which are the commonly used values in South India. Check local land records for legal use.

Frequently asked questions

How do I convert km to miles?

Multiply kilometres by 0.621371. 10 km is about 6.21 miles.

How many sq ft are in a cent and an acre?

One cent is about 435.6 sq ft and one acre is 43,560 sq ft, or 100 cent.

How is temperature converted?

°F = °C × 9/5 + 32, and K = °C + 273.15. The calculator converts through kelvin.

What is a ground in area measurement?

A ground is a South Indian land unit, commonly 2,400 sq ft.

Are US and UK gallons the same?

No. This tool uses the US gallon of 3.785 litres. The UK gallon is about 4.546 litres.