Math Tools
Common arithmetic shortcuts you'd otherwise reach for a spreadsheet to compute. Percentage of a number, percentage change between two values, percentage of a whole — three modes covering tips, discounts, growth rates, and grade conversions in one place.
29 math tools
Calculate percentages, percentage change, and percentage difference.
Compute tip amount and per-person split for any bill in seconds.
Convert between common units of length, mass, temperature and volume.
Calculate your grade point average from course grades and credit hours.
A full scientific calculator with trig, logs, powers, roots and memory.
Work out the sale price and amount saved from a price and a percentage off.
Convert numbers to Roman numerals and Roman numerals back to numbers.
Add, subtract, multiply and divide fractions with a simplified result.
Find the mean, median, mode and range of a list of numbers.
Simplify ratios and solve proportions for a missing value.
Solve any quadratic equation and find its roots and vertex.
Check whether a number is prime and find its factors.
Find the least common multiple and greatest common divisor of numbers.
Calculate the factorial of a number, including very large results.
Calculate combinations (nCr) and permutations (nPr) of n and r.
Convert numbers to and from scientific (standard form) notation.
Convert numbers to written words and words back to numbers.
Add, subtract, multiply and divide binary numbers.
Estimate how much paint you need for a room or wall.
Calculate the area of rectangles, circles, triangles and more.
Calculate mean, median, mode, standard deviation, variance, and more from a list of numbers.
Calculate area, perimeter, and angles of any triangle from sides or angles.
Solve for speed, distance, or time — enter any two to find the third.
Generate the Fibonacci sequence up to N terms or up to a maximum value.
Find the prime factors of any integer and display the factorization tree.
Calculate area, circumference, diameter, and radius of a circle from any one value.
Calculate percentage error, percentage difference, and percentage change between two values.
Calculate z-score, percentile rank, and probability for any value in a normal distribution.
Solve for voltage, current, resistance, or power — enter any two to find the other two.