Calculators

16 tools

Quick answers to the sums people look up every day: what 15% of a price is, how much a loan will cost each month, how much tax is in a receipt, how to split a bill, or how many hours a shift lasted. Every calculator updates as you type and shows the formula where it helps.

The Percentage, Loan EMI, Sales Tax and Tip calculators cover money, the Calorie and Macro calculators cover food, and the Time Duration, Aspect Ratio and Electricity Cost calculators cover everyday planning. For study and work there are Standard Deviation, Decimal to Fraction, Binary, Ohm's Law and Password Entropy calculators, plus a pet age calculator and a zodiac sign finder just for fun.

Percentage Calculator

Work out X% of a number, what percent one number is of another, percentage change, increase or decrease.

Loan EMI Calculator

Find the monthly instalment (EMI), total interest and total repayment for a home, car or personal loan.

Sales Tax / GST / VAT Calculator

Add sales tax, GST or VAT to a price, remove it from a price that includes it, or find the rate used.

Binary Calculator

Add, subtract, multiply and divide binary numbers, or apply AND, OR, XOR and bit shifts, with decimal and hex results.

Password Entropy Calculator

Measure a password's entropy in bits and estimate how long it would take to crack, right in your browser.

Standard Deviation Calculator

Paste a list of numbers to get the standard deviation, variance, mean, median, range and more.

Decimal to Fraction Calculator

Convert a decimal, including a repeating decimal like 0.(3), to a simplified fraction and mixed number.

Calorie Calculator

Estimate the calories you burn each day (BMR and TDEE) and targets for losing, keeping or gaining weight.

Tip Calculator

Work out the tip and total for a bill, and split it evenly between any number of people.

Time Duration Calculator

Find the time between two clock times or two dates, minus breaks, in hours, minutes and decimal hours.

Aspect Ratio Calculator

Find the aspect ratio of any width and height, and resize to a new width or height without distortion.

Ohm's Law Calculator

Enter any two of voltage, current, resistance and power to calculate the other two.

Macro Calculator

Split your daily calories into grams of protein, carbohydrates and fat for balanced, high-protein, low-carb or keto diets.

Electricity Cost Calculator

Work out how much an appliance costs to run per day, month and year from its wattage and your electricity price.

Dog & Cat Age Calculator

Convert your dog's or cat's age into human years, taking size into account for dogs.

Zodiac Sign Finder

Find your Western zodiac sign, element and Chinese zodiac animal from your date of birth.