Here are the everyday conversions with their formulas, so you can check any result.
Length
1 inch = 2.54 cm. To convert cm to inches, divide by 2.54. Example: 170 cm is about 66.9 inches.
Weight
1 kg = about 2.2046 lb. To convert kg to pounds, multiply by 2.2046. Example: 70 kg is about 154.3 lb.
Temperature
Fahrenheit = Celsius x 9/5 + 32. Example: 30 C is 86 F.
Area
1 square foot = 0.0929 square metres.
Land units in Bangladesh
Units such as katha and bigha differ between regions and districts, so check the local definition in your land documents before relying on any figure.
For any of these, the Unit Converter does the maths instantly. For walking distance, see the Km to Steps Calculator.