Free Online Calculators
Quick calculators that run right in your browser. Type your numbers, get the answer with the working shown, and see the matching Excel formula.
Date and Time Calculators
Jan 1 to Mar 15 = 73 days
Days Between Dates Calculator
Calculate the exact duration between two dates in days, weeks, months, and years.
Open calculatorBorn 1990 = 36 years old
Age Calculator
Find your exact age in years, months, and days from your birthdate.
Open calculatorSep 1 to Sep 30 = 22 workdays
Business Days Calculator
Count working days between two dates, excluding weekends and optional holidays.
Open calculatorMath and Statistics Calculators
80 to 100 = +25%
Percentage Change Calculator
Find X% of Y, percentage change, and percentage increase or decrease.
Open calculatorWeighted average = 84.2
Weighted Average Calculator
Enter values and their weights to calculate the weighted average instantly.
Open calculators = 4.31, mean = 72
Standard Deviation Calculator
Paste or enter a dataset to get the standard deviation, variance, and mean.
Open calculatorNothing in this category yet.
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