Calculators & Converters
Fast, accurate calculators and unit converters for money, health, dates and measurements.
Work out percentages, increases and decreases.
Age CalculatorFind exact age in years, months and days.
BMI CalculatorCalculate body mass index in metric or imperial.
Loan / EMI CalculatorEstimate monthly payments, interest and total cost.
Mortgage CalculatorEstimate monthly mortgage payments.
Compound Interest CalculatorProject savings growth with compound interest.
Discount CalculatorSee the final price after a discount.
Tip CalculatorSplit the bill and calculate tips.
Length ConverterConvert metres, feet, inches, miles and more.
Weight ConverterConvert kilograms, pounds, ounces and stones.
Temperature ConverterConvert Celsius, Fahrenheit and Kelvin.
Time Zone ConverterCompare times across cities and time zones.
Date Difference CalculatorCount the days between two dates.
Scientific CalculatorFull scientific calculator in your browser.
GST / Tax CalculatorAdd or remove GST, VAT and sales tax.
Salary / Hourly CalculatorConvert between hourly, monthly and yearly pay.
Calorie CalculatorEstimate daily calorie needs (BMR and TDEE).
GPA CalculatorCalculate GPA from grades and credit hours.
Fuel Cost CalculatorEstimate the fuel cost of any trip.
Area CalculatorArea of rectangles, circles, triangles and more.
Speed Distance Time CalculatorSolve for speed, distance or travel time.
Roman Numeral ConverterConvert numbers to Roman numerals and back.
Number to Words ConverterSpell out numbers as English words.
Data Storage ConverterConvert KB, MB, GB, TB and more.
Work out percentages, loan repayments, BMI, ages, and conversions for length, weight, temperature and more. Every calculator runs locally in your browser and gives instant results — no sign-up, no ads-first paywall, just the answer.
Calculators & Converters guides
- How to Calculate a PercentageLearn how to calculate a percentage, a percentage increase or decrease, and what percent one number is of another — with simple formulas and examples.
- How to Calculate Loan EMI PaymentsUnderstand how loan EMI is calculated, what affects your monthly payment and total interest, and estimate any loan or mortgage instantly with a free calculator.
- How to Calculate Your Exact AgeWork out your exact age in years, months and days, or the precise time between any two dates — free and instant, right in your browser.
- How to Calculate Your BMILearn the BMI formula, how to calculate it in metric or imperial units, what the categories mean, and the limitations of BMI as a health measure.
- How to Convert Units of MeasurementConvert length, weight, temperature and data sizes between metric and imperial instantly. Learn the common conversions and the formulas behind them.
- How to Calculate a Discount and a TipWork out sale prices and restaurant tips in seconds. Learn the simple formulas for discounts and tips, and split a bill between any number of people.