Calculators
Quick, accurate answers to everyday maths. Every calculator shows how the result was worked out, so you can trust it.
30 free tools
Percentage CalculatorFree percentage calculator. Work out X% of a number, what percent one number is of another, and percentage increase or decrease. Shows the formula.Age CalculatorCalculate your exact age in years, months and days from your date of birth. See total days lived and the countdown to your next birthday. Free.Loan EMI CalculatorCalculate your loan EMI (monthly installment), total interest and total payment for home, car or personal loans. Includes a full amortization schedule.Unit ConverterFree unit converter for length, weight, temperature, area, volume, speed and data size. Convert between metric and imperial units instantly.BMI CalculatorCalculate your Body Mass Index (BMI) in metric or imperial units. See your BMI category, healthy weight range for your height, and Asian BMI cut-offs.GPA / CGPA CalculatorCalculate your semester GPA and cumulative CGPA on a 4.0 scale. Add courses with credit hours and letter grades, and include previous semesters.Discount CalculatorCalculate the sale price and how much you save with a percentage discount. Supports extra stacked discounts and sales tax. Free and instant.Days Between DatesCount the days between two dates, including or excluding the end date. Also shows weeks, months and years, plus working days (Monday to Friday).Compound Interest CalculatorCalculate compound interest on savings and investments with yearly, quarterly, monthly or daily compounding and optional monthly deposits. Year-by-year table.Sales Tax / GST / VAT CalculatorAdd sales tax, GST or VAT to a price, or remove it from a tax-inclusive price. See the net amount, tax amount and gross total instantly. Any tax rate.Time Zone ConverterConvert a time between time zones around the world, with daylight saving time handled automatically. Compare several cities at once for meetings and calls.Tip & Bill Split CalculatorCalculate the tip and split a restaurant bill between friends. Choose the tip percentage, number of people and round up. Free and instant.Salary ConverterConvert pay between hourly, daily, weekly, monthly and yearly. Set your hours per week and days per week for an accurate salary comparison.Calorie CalculatorCalculate how many calories you need per day to maintain, lose or gain weight. Uses the Mifflin-St Jeor equation with your activity level. Metric or imperial.Pregnancy Due Date CalculatorCalculate your baby's due date from your last period or conception date. See how many weeks pregnant you are, your trimester and key milestones.Zakat CalculatorCalculate your Zakat (2.5%) on cash, gold, silver, investments and business goods, minus debts. Checks the nisab using today's gold or silver price.Marks Percentage CalculatorCalculate your percentage from obtained and total marks for one or many subjects. See your overall percentage and grade. For school, board and university exams.Scientific CalculatorFree online scientific calculator with sin, cos, tan, logarithms, powers, roots, factorials, π and e. Degrees or radians. Type or click, with history.Average CalculatorCalculate the mean (average), median, mode, range, sum and standard deviation of a list of numbers. Paste numbers separated by commas, spaces or lines.Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers online. Results are simplified and shown as a fraction, mixed number and decimal, with steps.Aspect Ratio CalculatorCalculate aspect ratios from width and height, or find the missing width or height for a ratio like 16:9 or 9:16. For video, images, screens and social media.Time CalculatorAdd or subtract hours, minutes and seconds, and calculate the duration between two times, including overnight shifts. Great for timesheets and work hours.Mortgage CalculatorCalculate your monthly mortgage payment with down payment, rate, term, property tax, insurance and PMI. See total interest and the payoff schedule.SIP CalculatorCalculate the future value of a monthly SIP in mutual funds. Includes annual step-up, lump sum, total invested, estimated returns and a yearly table.Profit Margin CalculatorCalculate profit margin and markup from cost and selling price, or find the selling price for a target margin. Clear difference between margin and markup.Ovulation CalculatorFind your most fertile days, ovulation date and next period from your last period and cycle length. See the next 3 cycles. Private: nothing is saved or sent.Sleep CalculatorFind the best bedtime or wake-up time based on 90-minute sleep cycles, so you wake up between cycles feeling refreshed. Includes time to fall asleep.Grade CalculatorCalculate your weighted course grade from assignments, quizzes and exams, and find what score you need on the final exam to get the grade you want.Body Fat CalculatorEstimate your body fat percentage with the US Navy tape-measure method using height, neck, waist and hip measurements. Shows fat mass, lean mass and category.Date CalculatorAdd or subtract days, weeks, months or years from a date, or count business days only. Find the date 90 days from today, 6 months ago and more.