Math

Percentage decrease calculator to find the drop between two values or solve the missing initial, final, or decrease percentage fast.

Exponent Calculator helps you solve powers, positive and negative exponents, and exponential values quickly with clear, accurate results.

Log Calculator helps you solve logarithms with base 10, base e, base 2, or any custom base. Get fast and accurate log results online.

Pythagorean Theorem Calculator solves missing sides of a right triangle fast. Use it to find the hypotenuse or any unknown side easily.

Use our Slope Calculator to find slope, angle, percent grade, line equation, y-intercept, rise/run, and distance using two points or other methods.

Use our Square Root Calculator to find the principal square root of a number or reverse-calculate x from a square root value.

Use our Significant Figures Calculator to count sig figs, round numbers or expressions, and show decimal, scientific, and E notation.

Find the percentage increase between two numbers. Enter original and new values to get % increase, change amount, and final value. Reverse solve from % too. Instant steps & PDF.

Use our Circumference Calculator to find circle radius, diameter, circumference, and area from any one known value with unit conversions.