Free Maths Calculator

Unit Converter

Convert between units of length, mass, capacity, area, volume and time, with the link between the units stated before any multiplying happens. Area and volume conversions explain why the factor gets squared or cubed, the detail that catches out even strong GCSE students on conversion questions.

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    Worked Example

    Convert 3.5 m² into cm².

    1. 1 m = 100 cm, so 1 m² = 100 × 100 = 10,000 cm²
    2. Going from the bigger unit to the smaller one, multiply:3.5 × 10,000 = 35,000
    3. So 3.5 m² = 35,000 cm²

    Answer: 35,000 cm²

    Try These Yourself

    Convert 2,500 g to kg.Show answerHide answer

    Answer: 2.5 kg

    1 kg = 1,000 g, and grams are the smaller unit, so divide by 1,000.

    Convert 3 hours to minutes.Show answerHide answer

    Answer: 180 minutes

    1 hour = 60 minutes, so multiply: 3 × 60.

    Convert 2 m² to cm².Show answerHide answer

    Answer: 20,000 cm²

    1 m² = 10,000 cm², so 2 × 10,000.