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Amazing truths about the world shown with calculators.
Featured in
An example - BMI Calculator
Height
ft
in
Weight
lb
BMI
BMI Prime
Advanced features
Are you an athlete?
No
Sex
Female
Age
Percentile
About us
In a surprisingly large part, our reality consists of calculable problems. Should I buy or rent? What's my ideal calorie intake? Can I afford to take this loan? How many lemonades do I need to sell in order to break even? Often we don't solve these problems, because we lack knowledge, skills, time or willingness to calculate. And then we make bad, uninformed decisions.
Omni Calculator is here to change all that - we are working on a technology that will turn every* calculation-based problem trivial to solve for anyone.
*within reason
The most popular calculators
p-value
The p-value calculator can help you find the p-value and evaluate how compatible your data is with the null hypothesis.
Confidence interval
The confidence interval calculator finds the confidence level for your data sample.
Test grade
With this test grade calculator, you'll quickly determine the test percentage score and grade.
Log
The log calculator (logarithm) calculates the value of a logarithm with an arbitrary base.
Sales tax
Sales tax calculator works out the tax imposed on the sale of goods and services.
Significant figures
The significant figures calculator performs operations on sig figs and shows you a step-by-step solution!
Scientific notation
The scientific notation calculator converts any decimal to scientific notation.
Square footage
Square footage calculator turns length and width into an area and converts to/from multiple units.
Percentage increase
Percentage increase calculator calculates the increase of one value to the next in terms of percent.
Exponent
Exponent calculator helps you find the result of any base raised to a positive or negative exponent.
Percentage
Simple percentage calculator is a generic percentage-based problem solver.
Square root
Square root calculator helps you find the square root of any positive number.
Circumference
Use this free circumference calculator to find the area, circumference and diameter of a circle.
Slope
The slope calculator helps find the slope of any line through two given points.
Salary to hourly
Salary to hourly converter does a quick paycheck recalculation.
Pythagorean theorem
Pythagorean theorem calculator helps you find out the length of a missing leg or hypotenuse of a right triangle.