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Unit Converter

100% Free

Convert between length, weight, volume, area, and speed units — metric and imperial — instantly.

5 Categories
Instant
Client-Side
Metric & Imperial
1,000Metre (m)

1 Kilometre (km) = 1,000 Metre (m)

All Length Conversions

Millimetre (mm)10,00,000
Centimetre (cm)1,00,000
Metre (m)1,000
Kilometre (km)1
Inch (in)39,370.079
Foot (ft)3,280.8399
Yard (yd)1,093.6133
Mile (mi)0.62137

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How to Use

  1. 1 Select a unit category from the tabs — Length, Weight, Volume, Area, or Speed
  2. 2 Enter the value you want to convert
  3. 3 Choose the source unit from the From dropdown
  4. 4 Choose the target unit from the To dropdown
  5. 5 The result appears instantly, along with a full conversion table for all units in the category
  6. 6 Tap the ⇄ button to swap From and To

Features

  • Length: mm, cm, m, km, inch, foot, yard, mile
  • Weight: mg, g, kg, metric ton, oz, lb, stone
  • Volume: ml, litre, fl oz, cup, pint, quart, gallon, m³
  • Area: mm², cm², m², km², sq ft, sq yard, acre, hectare
  • Speed: m/s, km/h, mph, knot, ft/s
  • Swap button to reverse direction in one click
  • Full conversion table showing all units simultaneously
  • Smart number formatting — avoids scientific notation for common values

Why it Matters

Unit conversion is one of those tasks that sounds simple but causes endless errors — wrong scale, wrong direction, forgotten factors. Having a reliable reference that shows all conversions at once eliminates guesswork whether you are cooking, building, shipping, or studying.

★★★★★

Use Cases

Construction

Convert between sq ft, sq yards, and hectares for land and flooring

Cooking & Baking

Convert ml, cups, fl oz, and litres when following foreign recipes

Shipping & Logistics

Convert weight between kg, lb, and tonnes for shipment calculations

Science & Education

Convert SI and imperial units for physics, chemistry, and geography

Frequently Asked Questions

How does unit conversion work?
Each unit has a fixed factor relative to a base SI unit (e.g. metre for length). To convert, multiply the input by the source factor to get the base value, then divide by the target factor.
Why does my result show many decimal places?
Unit conversions often produce irrational decimal results (1 mile = 1.609344 km exactly). The calculator shows up to 8 significant figures to preserve accuracy.
Is the US gallon the same as the UK gallon?
No. This calculator uses the US gallon (3.785 L). The UK (imperial) gallon is 4.546 L — about 20% larger.
Which area unit is used for land in India?
Common land units in India include sq ft, sq yard, acre, and hectare. Guntha, bigha, and cents are regional — those aren't in this tool but may be added.

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