Ratio Calculator: Simplify, Scale, Divide and Compare Ratios
Simplify ratios, find equivalent ratios, divide totals proportionally and compare two ratios with formulas and checked examples.
Standard Deviation Calculator: Sample, Population and Variance
Standard Deviation Calculator Calculate sample or population standard deviation, variance, mean, count, sum, range, standard error and coefficient of variation from one dataset. Dataset2, 4, 4, 4, 5, 5, 7, 9 Separate values with commas, semicolons, spaces or new lines. Use a period for decimals; commas are separators, not thousands marks. Maximum: 10,000 values. Data … Read more
Hours Calculator: Time Duration, Add, Subtract and Convert
Calculate hours between clock times, add or subtract durations, and convert days, hours, minutes and seconds.
Fraction Calculator: Add, Subtract, Multiply, Divide and Simplify
Calculate and simplify fractions, mixed numbers, integers and decimals with exact reduced and mixed-number results.
Age Calculator: Exact Age, Days Lived and Next Birthday
Calculate exact age in years, months and days, total days lived, birth weekday and days until the next birthday.