All calculators & grading scales
Every free calculator and grading-scale reference, grouped by category.
Unit Converters
View categoryArea Converter
The Area Converter converts any area value between 9 common units. Enter a number, pick the unit you have and...
Open calculator → CalculatorDigital Storage Converter
The Digital Storage Converter converts any digital storage value between 10 common units. Enter a number, pick...
Open calculator → CalculatorLength Converter
The Length Converter converts any length value between 9 common units. Enter a number, pick the unit you have...
Open calculator → CalculatorSpeed Converter
The Speed Converter converts any speed value between 5 common units. Enter a number, pick the unit you have an...
Open calculator → CalculatorTemperature Converter
The Temperature Converter converts any temperature value between 3 common units. Enter a number, pick the unit...
Open calculator → CalculatorTime Converter
The Time Converter converts any time value between 6 common units. Enter a number, pick the unit you have and...
Open calculator → CalculatorVolume Converter
The Volume Converter converts any volume value between 11 common units. Enter a number, pick the unit you have...
Open calculator → CalculatorWeight & Mass Converter
The Weight & Mass Converter converts any mass value between 7 common units. Enter a number, pick the unit you...
Open calculator →Everyday Calculators
View categoryAverage (Mean) Calculator
The average calculator finds the arithmetic mean of a list of numbers, along with the count, sum, minimum and...
Open calculator → CalculatorDiscount & Sale Price Calculator
The discount calculator turns an original price and a percentage off into the final sale price and the amount...
Open calculator → CalculatorPercentage Calculator
The percentage calculator handles the three questions people actually ask: what is A% of B, A is what percent...
Open calculator → CalculatorTip Calculator
The tip calculator works out the tip and the total from a bill and a tip percentage, and optionally splits the...
Open calculator →Business Calculators
View categoryBreak-Even Point Calculator
The break-even calculator finds how many units you must sell to cover your fixed costs, given a unit price and...
Open calculator → CalculatorMarkup Calculator
The markup calculator sets a selling price from a unit cost and a markup percentage, and shows the resulting p...
Open calculator → CalculatorProfit Margin Calculator
The profit margin calculator turns a unit cost and selling price into the profit per unit, the margin percenta...
Open calculator → CalculatorROI (Return on Investment) Calculator
The ROI calculator expresses a net profit as a percentage of the amount invested — a simple, standard way to c...
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