Free Maths Calculator

Rounding Calculator

Round any number to the nearest 10, 100 or 1,000, to a set number of decimal places, or to significant figures. The steps name the digit being kept and the decider digit next to it, exactly the way it is taught in class, so the answer never feels like a mystery.

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Answer

Method, Step by Step

    Worked Example

    Round 47.62 to 1 decimal place.

    1. Count one decimal place and draw the cut: 47.6 | 2
    2. The decider digit is 2
    3. 2 is less than 5, so the kept digits stay as they are: 47.6

    Answer: 47.6

    Try These Yourself

    Round 6,384 to the nearest 100.Show answerHide answer

    Answer: 6,400

    The hundreds digit is 3; the decider is 8, so round up.

    Round 0.04751 to 2 significant figures.Show answerHide answer

    Answer: 0.048

    First two significant figures are 4 and 7; the decider is 5, so the 7 rounds up.

    Round 9.97 to 1 decimal place.Show answerHide answer

    Answer: 10.0

    The decider is 7, so 9.9 rounds up to 10.0, keep the zero.