CALCULATOR DIRECTORY
Everyday calculators,
without the fuss.
Search by topic or name. Every tool is free, fast, and built to make the next decision easier.
51 calculators
Salary to Hourly Calculator
Convert an annual salary into an hourly pay estimate.
Open calculator →moneyHourly to Salary Calculator
See weekly, monthly, and annual pay from an hourly rate.
Open calculator →moneyOvertime Calculator
Estimate overtime pay at your agreed multiplier.
Open calculator →moneyTip Calculator
Calculate a tip and a fair per-person total.
Open calculator →moneyDiscount Calculator
Find the sale price and savings from a percentage discount.
Open calculator →moneyProfit Margin Calculator
Calculate profit and profit margin from revenue and costs.
Open calculator →moneyMarkup Calculator
Turn a cost and markup percentage into a selling price.
Open calculator →moneyCommission Calculator
Estimate commission based on sales and a percentage rate.
Open calculator →moneyLoan Payment Calculator
Estimate a fixed monthly loan payment, excluding taxes and insurance.
Open calculator →moneySimple Interest Calculator
Calculate simple interest and total value.
Open calculator →moneyCompound Interest Calculator
Estimate compounded growth with annual compounding.
Open calculator →moneySales Tax Calculator
Calculate sales tax and the final purchase price.
Open calculator →moneySavings Goal Calculator
Find the monthly amount needed to reach a savings goal.
Open calculator →moneyDebt-to-Income Calculator
Estimate your debt-to-income ratio from monthly amounts.
Open calculator →moneyAnnual Income Calculator
Estimate your yearly, monthly, and weekly income from an hourly rate.
Open calculator →percentagePercentage Calculator
Find what percentage one number is of another.
Open calculator →percentageWhat Is X% of Y?
Calculate a percentage of any number.
Open calculator →percentagePercentage Increase Calculator
Measure a percentage increase or decrease between two values.
Open calculator →percentagePercentage Difference Calculator
Compare two values using their average as the reference.
Open calculator →percentageReverse Percentage Calculator
Find the original value before a percentage reduction or increase.
Open calculator →mathTest Grade Calculator
Calculate a percentage score and an estimated letter grade from total and incorrect answers.
Open calculator →time dateBirth Year Calculator
Estimate a birth year from a person’s current age and the current year.
Open calculator →conversionsFeet to Centimeters
Convert feet to centimeters.
Open calculator →conversionsCentimeters to Feet
Convert centimeters to feet.
Open calculator →conversionsInches to Centimeters
Convert inches to centimeters.
Open calculator →conversionsPounds to Kilograms
Convert pounds to kilograms.
Open calculator →conversionsKilograms to Pounds
Convert kilograms to pounds.
Open calculator →conversionsMiles to Kilometers
Convert miles to kilometers.
Open calculator →conversionsFahrenheit to Celsius
Convert Fahrenheit to Celsius.
Open calculator →conversionsCelsius to Fahrenheit
Convert Celsius to Fahrenheit.
Open calculator →health fitnessBMI Calculator
Estimate body mass index from height and weight.
Open calculator →health fitnessCalorie Calculator
Estimate daily energy needs using a simplified Mifflin-St Jeor baseline.
Open calculator →health fitnessRunning Pace Calculator
Calculate average running pace per kilometer.
Open calculator →health fitnessWater Intake Calculator
Estimate a daily water-intake target based on weight and exercise.
Open calculator →mathAverage Calculator
Find the arithmetic mean of three numbers.
Open calculator →mathRatio Calculator
Express two numbers as a simplified ratio.
Open calculator →mathExponent Calculator
Raise a number to a power.
Open calculator →mathSquare Root Calculator
Find the principal square root of a non-negative number.
Open calculator →mathFraction Calculator
Convert a fraction to a decimal and percentage.
Open calculator →mathStandard Deviation Calculator
Calculate the population standard deviation of three values.
Open calculator →time dateDecimal Hours to Time Calculator
Convert decimal hours into hours and minutes.
Open calculator →businessBusiness Break-Even Calculator
Estimate how many sales your business needs to cover fixed costs.
Open calculator →businessROI Calculator
Calculate the return on investment as a percentage.
Open calculator →AI toolAI API Cost Calculator
Estimate API costs with centralized, clearly labelled example model pricing.
Open calculator →AI toolLLM Token Cost Calculator
Estimate the input and output cost of an LLM request.
Open calculator →AI toolAI Token Calculator
Estimate tokens from words; tokenization varies by model and language.
Open calculator →AI toolAI Chatbot Cost Calculator
Estimate monthly AI chatbot API spending.
Open calculator →AI toolAI SaaS Cost Calculator
Estimate costs, revenue, margin, and break-even for an AI product.
Open calculator →AI toolAI Product Break-Even Calculator
Find the customer count needed to cover fixed costs.
Open calculator →AI toolAI Image Generation Cost Calculator
Estimate image-generation spending; provider pricing varies.
Open calculator →AI toolAI Video Generation Cost Calculator
Estimate video-generation spending; provider pricing varies.
Open calculator →