Calculators for students, teachers, and lifelong learners.
Browse hand‑picked tools in this category to quickly solve everyday problems, explore ideas, and make informed decisions.
Calculate the simple arithmetic average of a series of percentages.
Calculate the percentage difference between two values relative to their average.
Calculate how a value grows over time with compound interest or periodic increases.
Calculate how long it takes for a value to double at a constant growth rate.
Convert any fraction into its equivalent percentage form instantly.
Estimate total fuel expenses for a trip based on distance, efficiency, and price.
Calculate the percentage change (increase or decrease) from an original value to a new value.
Calculate the total percentage growth and net profit of an investment.
Calculate the percentage error between an experimental or observed value and a theoretical or accepted value.
Calculate how close you are to reaching a numerical goal based on your current progress.
Calculate the final percentage result when taking a percentage of another percentage.
Calculate the arithmetic difference between two percentages, expressed in percentage points.
Calculate the relative change (percentage increase or decrease) between two values.
Calculate the steepness of a slope as a percentage (grade).
Calculate what percentage a smaller duration of time is of a larger total duration.
Calculate the actual numerical value of a given percentage of a total.