Math & Numbers Calculators — Percentiles and Stats

Free math and numbers calculators for percentiles, percentages, averages, and rate of change. Instant results with plain-language explanations of each figure.

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  Percentile Calculatorlive

  Find the percentile rank of any value in a dataset, or the value at a given percentile.

  67th percentile · n = 24
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  Percentage Calculatorlive

  Four modes for every common percentage question — find a percentage, compare two numbers, or reverse calculate.

  20% of 150 = 30
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  Percentage Increase & Change Calculatorlive

  Calculate percentage increase, decrease, change, and difference between any two values.

  80 → 100 = +25%
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  Average Calculatorlive

  Mean, median, mode, range, and standard deviation of any list of numbers.

  Mean 19.17 · Median 18 · Mode 18
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  Weighted Average Calculatorlive

  Weighted mean with formula shown — ideal for grades, portfolios, and survey data.

  86 = (80×40 + 90×60) ÷ 100
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  Average Rate of Change Calculatorlive

  Calculate the average rate of change between two coordinate points — formula, interpretation, and graph.

  (20−4)÷(5−1) = 4
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  Standard Deviation Calculatorcoming soon

  Population and sample standard deviation with variance.
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  Z-Score Calculatorcoming soon

  Standardised score from value, mean, and standard deviation.
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  Fraction Calculatorcoming soon

  Add, subtract, multiply, and divide fractions with steps.
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  Ratio Calculatorcoming soon

  Simplify, scale, and compare ratios.