Unit Converter

A unit converter translates a measurement from one unit to another within the same physical category (you can't convert weight to length, for example). The tool uses internationally-standardised SI ratios as its reference, with precision sufficient for engineering and accounting use.

How the calculation works

Each category has a reference base unit (e.g. metre for length, kilogram for weight). Conversion goes through that base: input → base → target.

Result = (input × source factor) ÷ target factor

Worked example

Convert 5 kilograms to pounds:

1. Input: 5 kg
2. Base unit: kilogram (factor 1)
3. Pound factor = 0.45359237 kg
4. Result = 5 ÷ 0.45359237 = 11.0231 lb

Supported categories

• Length: mm, cm, m, km, in, ft, yd, mi, nautical mile.
• Weight: mg, g, kg, t, oz, lb, stone.
• Volume: mL, L, m³, US/UK gallon, fl oz, cup, tsp, tbsp.
• Temperature: Celsius (°C), Fahrenheit (°F), Kelvin (K).
• Area: mm², cm², m², ha, km², ft², yd², acre, mi².
• Speed: m/s, km/h, mph, knot, ft/s.
• Pressure: Pascal, kilopascal, bar, atmosphere, PSI, mmHg.
• Energy: Joule, kilojoule, calorie, kcal, watt-hour, kWh, BTU.

Tips for Saudi users

• Saudi Arabia officially uses the metric system (metre, kilogram, litre).
• Real estate sometimes uses 'm²' and 'feddan' (Saudi feddan ≈ 4047 m² ≈ international acre).
• Cars: use 'km/h' for speed and 'L/100 km' for fuel economy locally.
• Gold: use 'g' (grams) and 'oz' (ounce) for international price tracking.