Free online calculators

Financial calculators

Prices, discounts, tips and interest.

• MtgMortgage Payment CalculatorChoose your country first, then work out your mortgage payment with that country's rules: Canadian semi-annual compounding and CMHC insurance, US taxes and PMI, UK repayment mortgages, Australian home loans or Indian EMIs.
• AffordMortgage Affordability CalculatorChoose your country, then enter your income, debts, other housing costs, down payment and the interest rate to see the home price a typical lender would allow, using that country's usual rules, including the Canadian stress test.
• LoanLoan Payment CalculatorChoose your country, then enter the loan amount, interest rate and term to see your payment, the total interest, a balance chart and the yearly schedule. It works for car loans, personal loans and other equal-payment loans.
• −%Discount CalculatorEnter the original price and the percent off to see the sale price and how much you save. Add an extra discount or sales tax if you need to. Everything works in your browser.
• TipTip CalculatorType the bill, pick a tip and say how many people are sharing. You get the tip, the total and each person's share straight away, all in your browser.
• $%Simple Interest CalculatorEnter an amount, a yearly interest rate and a length of time to see the interest and the total. Choose years, months or days. Everything works in your browser.
• TaxSales Tax, VAT and GST CalculatorChoose your country first, then add tax to a price or work out the price before tax: Canadian GST, HST, PST and QST, US state and local sales tax, UK VAT, Australian GST or Indian GST.
• Tax$Income Tax Calculator (Canada)Enter your yearly employment income and your province to estimate your 2026 federal and provincial income tax, CPP, EI and take-home pay. It runs in your browser and nothing is stored.
• CICompound Interest CalculatorSee how savings or investments can grow when interest earns interest. Enter a starting amount, regular deposits, a yearly rate and the years, then read the final balance, a yearly chart and a year-by-year table.

Coming soon: Land transfer tax and stamp duty, Income tax for the US, UK, Australia, India and the other Canadian provinces.

Fitness & Health calculators

Body mass index and healthy weight ranges.

• BMIBMI CalculatorEnter your height and weight in metric or imperial units to see your body mass index, the category it falls in and the weight range that counts as normal for your height. Nothing you type is stored.
• kcalCalorie CalculatorEnter your age, sex, height, weight and activity level to estimate how many calories your body uses each day, and what that means for losing, keeping or gaining weight. Your numbers stay in your browser.
• IBWIdeal Weight CalculatorEnter your height to see ideal weight from the Devine, Robinson, Miller and Hamwi formulas, along with the weight range that gives a healthy BMI. Add your current weight to see how it compares.
• H2OWater Intake CalculatorEnter your weight, how much you exercise and the weather to get a general estimate of how much to drink in a day, shown in litres and glasses. Everything runs in your browser.
• BF%Body Fat CalculatorEstimate your body fat percentage from a tape measure using the US Navy method. See your category, a colour scale and, if you add your weight, your fat and lean mass. Nothing you type is stored.
• HRTarget Heart Rate CalculatorEnter your age (and your resting heart rate if you know it) to see your estimated maximum heart rate, five training zones and the moderate and vigorous ranges used by health authorities.
• DuePregnancy Due Date CalculatorEnter the first day of your last period or the date of conception to estimate your due date, see how many weeks pregnant you are today, which trimester you are in, and the dates of key milestones.
• 1RMOne-Rep Max CalculatorEnter a weight you lifted and how many reps you did to estimate the most you could lift once. See seven formulas side by side and a table of training weights at each percentage.
• PaceRunning Pace CalculatorWork out your running pace, finish time or distance from the other two, in kilometres or miles. You also get speed, split times and predicted times for 5K, 10K, half marathon and marathon.

Coming soon: Macro calculator, Calories burned.

Math calculators

Percentages, averages and everyday number work.

• sinScientific CalculatorA free calculator you can tap or type on, with a basic mode and a scientific mode. Use brackets, powers, roots, trigonometry in degrees or radians, logarithms, factorials and percent, with a history of your last calculations.
• %Percentage CalculatorFill in the blanks and get the answer instantly, with the working shown. Find a percent of a number, a percentage increase or decrease, or the original amount. Free, and nothing is uploaded.
• %ΔPercentage Difference CalculatorEnter two numbers to see how far apart they are, as a percentage of their average. The order does not matter. The working is shown, and everything runs in your browser.
• a/bFraction CalculatorAdd, subtract, multiply or divide two fractions or mixed numbers. You get the answer in lowest terms, as a mixed number, a decimal and a percentage, with the working shown.
• A:BRatio CalculatorSimplify a ratio such as 12 : 8, find the missing number in a proportion, or share an amount in a given ratio. You get the answer in lowest terms with the working shown, all in your browser.
• AvgAverage CalculatorType or paste a list of numbers and get the mean (the average), median, mode, range, sum and count straight away. Everything is worked out in your browser.

Coming soon: Scientific notation.

Other calculators

Dates, ages and time.

• AgeAge CalculatorPick a date of birth to see the exact age in years, months and days, the days until the next birthday, and the day of the week you were born. It works in your browser and nothing is uploaded.
• ΔdDate Difference CalculatorPick two dates to see how many years, months, weeks and days lie between them, and how many of those days are weekdays. It works in your browser and nothing is uploaded.
• TimeTime and Hours CalculatorFind how many hours you worked between a start and an end time, with an unpaid break and optional pay, or add and subtract lengths of time in days, hours, minutes and seconds.
• TZTime Zone ConverterPick a date and time in one place and see what the clocks show in other cities, with the day change and the difference in hours. Daylight saving time is applied for the date you choose. It runs in your browser and nothing is uploaded.
• mLength ConverterType a length, choose the unit you have and the unit you want, and read the answer straight away, together with the same length in every other unit. It runs in your browser and nothing is uploaded.
• kgWeight ConverterType a weight, choose the unit you have and the unit you want, and read the answer straight away, together with the same weight in every other unit. It runs in your browser and nothing is uploaded.
• m²Area ConverterType an area, choose the unit you have and the unit you want, and read the answer straight away, together with the same area in every other unit. It runs in your browser and nothing is uploaded.
• LVolume ConverterType a volume, choose the unit you have and the unit you want, and read the answer straight away, together with the same volume in every other unit. Cups, spoons, pints, quarts and gallons are US sizes, and the imperial gallon is listed too. It runs in your browser and nothing is uploaded.
• km/hSpeed ConverterType a speed, choose the unit you have and the unit you want, and read the answer straight away, together with the same speed in every other unit. It runs in your browser and nothing is uploaded.
• °CTemperature ConverterType a temperature, choose Celsius, Fahrenheit or Kelvin for the one you have and the one you want, and read the answer straight away. It runs in your browser and nothing is uploaded.
• XIVRoman Numeral ConverterType a number to get the Roman numeral, or type a Roman numeral to get the number. It works both ways in one box, from 1 (I) to 3,999 (MMMCMXCIX). It runs in your browser and nothing is uploaded.
• 123Number to WordsType a number and read it written out in English words. Switch to Ordinal for first, second, third, or to Cheque for amounts such as one thousand two hundred thirty-four and 56/100 dollars. It runs in your browser and nothing is uploaded.