➗ Basic Arithmetic

➕

Basic Math

Perform common addition, subtraction, multiplication and division calculations with two numbers. Includes the selected operation and a clear worked result.

%

Percentage

Calculate a percentage of a number, find what percentage one number is of another, and find the whole when a percentage and part are known.

📈

Percentage Change

Calculate the percentage change from an original value to a new value, including the signed increase or decrease.

↔️

Percentage Difference

Compare two values using percentage difference based on the average of their magnitudes.

⚠️

Percentage Error

Calculate percentage error by comparing an experimental or measured value with a reference or accepted value.

⚖️

Ratio

Simplify a two-part ratio, calculate decimal and percentage shares, and divide a total according to the ratio.

⚖️

Proportion

Solve a direct proportion a:b = c:d by calculating the missing fourth value from three known values.

x̄

Average

Calculate the arithmetic mean of two numbers and show their sum and count.

⚖️

Weighted Average

Calculate a weighted average from two values and their weights, useful when the values contribute unequally.

↔️

Midpoint

Find the midpoint between two numbers using the arithmetic mean of the two endpoints.

|x|

Absolute Value

Find the absolute value of a number, which represents its non-negative distance from zero.

1/x

Reciprocal

Calculate the reciprocal of a number by finding its multiplicative inverse.

÷R

Remainder

Calculate the quotient and remainder when one number is divided by another.

mod

Modulo

Calculate the mathematical modulo of one number by another using the floor-based definition.

≈

Rounding

Round a number to the nearest integer and compare it with its floor and ceiling values.

10ˣ

Scientific Notation

Convert a number into scientific notation by calculating its coefficient and power of ten.

⌊x⌋

Floor

Find the floor of a number, the greatest integer less than or equal to the input.

⌈x⌉

Ceiling

Find the ceiling of a number, the smallest integer greater than or equal to the input.

0.00

Decimal Places

Determine the number of digits after the decimal point for a decimal input using a fixed numeric scaling approach.

sig

Significant Figures

Calculate a six-significant-figure display using the same significant-figure formatting rule used by the current calculator engine.