Unit converter

Convert length, weight, temperature, area, Thai units, internet speed and 140+ units, with formulas and tables

Formula and table →

Categories

Length converter mm · cm · m · km · in · ft Area converter cm² · m² · km² · ha · rai · ngan Volume converter ml · cm³ · L · m³ · tsp · tbsp Weight converter mg · g · kg · t · oz · lb Temperature converter °C · °F · K Speed converter m/s · km/h · mph · kn · ft/s · Ma Time converter ms · s · min · h · d · wk Data storage converter b · B · KB · MB · GB · TB Internet speed converter bps · kbps · Mbps · Gbps · B/s · KB/s Pressure converter Pa · kPa · bar · psi · atm · mmHg Energy converter J · kJ · cal · kcal · Wh · kWh Power converter W · kW · hp · PS · BTU/h Angle converter ° · rad · grad · ′ · ″ · tr Fuel economy converter km/L · L/100km · mpg · mpg (UK) Flow rate converter L/s · L/min · L/h · m³/h · m³/s · GPM Illuminance converter lx · fc · klx

Popular conversions

centimetre → inchinch → centimetrekilometre → milemile → kilometremetre → footfoot → metrekilogram → poundpound → kilogramCelsius → FahrenheitFahrenheit → Celsiussquare metre → square wa (Thai)rai (Thai) → square metrelitre → gallon (US)millilitre → fluid ounce (US)kilometres per hour → miles per hourmiles per hour → kilometres per hourgigabyte → megabytemegabits per second → megabytes per secondpounds per square inch → barhorsepower (hp) → kilowattkilocalorie → kilojoulebaht of gold (bullion) → gramwa (Thai) → metrekilometres per litre → litres per 100 km

About Unit converter

Pick a category, type a number and choose the units — the result appears instantly with the formula used. Set 1 to 12 significant figures and swap units with one click. Every unit pair has its own page with a conversion table you can keep or print.

As well as metric and imperial units there are traditional Thai units — wa, sok, khuep, rai, ngan, square wa, thang, kwian, baht of gold and tamlueng — plus everyday conversions such as internet speed (Mbps vs MB/s), tyre pressure (psi vs bar) and fuel economy (km/L vs L/100 km).

Convert a whole list by pasting one value per line. Free members can pin the pairs they use most; supporters can convert thousands of rows and download the result as Excel.

FAQ

How accurate is it?

It uses the standard definitions, e.g. 1 inch = exactly 2.54 cm, and shows up to 12 significant figures.

Does it have Thai units?

Yes: wa, sok, khuep, sen, rai, ngan, square wa, thang, kwian, thanan, baht, salueng, tamlueng, chang and hap.

Is it free?

Yes, every unit is free with no sign-up. A free account lets you pin favourite pairs.

Why does a 1 TB drive show 931 GB in Windows?

Makers count 1 TB as 10¹² bytes, while Windows shows binary units (GiB), where 1 GiB = 1,073,741,824 bytes.

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