Calculators

Calculate exact age in years, months and days between a date of birth and any date — handy for exam eligibility.

Convert a Unix timestamp to a human-readable date and time, or a date back to epoch seconds and milliseconds, with the current timestamp live.

Find the exact number of years, months, weeks and days between any two dates.

Estimate your due date and current week of pregnancy from your last period or conception date.

Add or subtract hours, minutes and seconds across multiple rows to get a running total.

Calculate hours worked between a start and end time, minus a break.

See the current live time in multiple time zones side by side, and add or remove cities.

Convert any date and time between time zones, with your zone detected automatically and your choices remembered.

A simple countdown timer and stopwatch, right in your browser.

A focus timer using the Pomodoro technique — 25 minutes of focus, 5 minutes of break.

Count business days between two dates, excluding weekends.

Find the ISO 8601 week number for any date.

Count the days, weeks and working days left until any date — a trip, a deadline or a festival.

Find out how many days, months and years have passed since any date.

Find how many days are left until your next birthday and the age you will turn.

Count the days, weeks and working days left until your wedding.

Count down to any event — a launch, a trip or a party — in days, weeks, working days and hours.

Count the days left to your exam, with weeks and working days, so you can plan your revision.

Add or subtract years, months and days to any date and see the resulting date and weekday.

Find the best bedtime or wake-up time using 90-minute sleep cycles.

Find your last working day and the buyout amount from your resignation date and notice period.

Work out your leave balance from your yearly entitlement, months worked, leaves taken and carry-forward.

Add up working hours across days from start and end times and breaks, with overtime and pay.

Calculate your Body Mass Index from height and weight, and see which category it falls into.

Calculate your Basal Metabolic Rate and daily calorie needs based on your activity level.

Free body fat calculator: enter age, height, weight, neck and waist (and hip for women) to see your body fat percentage, category, fat mass and lean mass on a meter.

Estimate a healthy ideal weight range for your height and sex using the Devine formula.

Calculate your running or walking pace per kilometre and speed from distance and time.

Estimate the likely conception date from your last period or from an already-known due date.

Estimate the calories you burn per day (TDEE) from your age, height, weight and activity level.

Find how many calories to eat each day to maintain, lose or gain weight at a safe pace.

Estimate how much water you need each day from your weight, exercise and the weather.

Turn your daily calories into grams of protein, carbohydrates and fat using a balanced, high-protein or lower-carb split.

Find your daily protein need in grams based on your weight and activity.

Convert steps into kilometres and estimated calories burned using your height and weight.

Estimate calories burned during walking, running, cycling, yoga, gym and other activities from your weight and time.

Calculate your CGPA from semester SGPAs and credits, and convert it to an approximate percentage.

Add up marks across subjects and get your total, percentage and result band.

Check your attendance percentage, how many classes you can still miss, or how many you must attend to reach the required level.

Turn the number of chapters, hours per chapter and days left into a daily study plan with revision time.

Paste any text and find out how long it takes to read and to speak aloud, with word and character counts.

Create APA 7 or MLA 9 citations for a website, book or journal article from the details you enter.

Calculate the current run rate and projected score from runs scored and overs bowled.

Find the required run rate, runs needed and balls left to chase a target in a T20, ODI or any match.

Calculate a team's net run rate (NRR) from runs scored, overs faced, runs conceded and overs bowled.

Calculate a batter's strike rate, runs per over and balls per run.

Calculate a bowler's economy rate, bowling average and strike rate.

Calculate a batting average from runs, innings and not outs.

Create a full round-robin schedule where every team plays every other team, single or home-and-away.

Build a knockout tournament bracket with seeding and byes for any number of teams.

Split your wedding budget across venue, catering, clothes, photography and more, with the cost per guest.

Divide an event budget across venue, catering, decor, entertainment and more, with the cost per guest.

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

Calculate voltage from current and resistance, or from power and current.

Calculate electric current (amps) from voltage and resistance, or from power and voltage.

Calculate resistance in ohms from voltage and current, or from power and current.

Calculate real, apparent and reactive power from voltage, current and power factor, single or three phase.

Calculate energy used in kWh (units) and its cost from power, hours and the rate per unit.

Find how long a battery will power your load from its Ah, voltage, usable charge and efficiency.

Find the turns ratio, secondary turns and primary and secondary currents of a transformer.

Calculate the area of a rectangle, square, triangle, circle, trapezoid, parallelogram or ellipse.

Calculate the volume of a cuboid, cube, cylinder, sphere, cone or pyramid in litres and cubic metres.

Estimate roof area and the number of sheets or tiles from the building size, pitch and overhang.

Calculate how much sand you need for an area and thickness, in cubic feet, cubic metres, tonnes and brass.

Convert between Celsius, Fahrenheit, Kelvin and Rankine.

Convert wind speed between km/h, m/s, mph and knots, with the Beaufort scale description.

Find sunrise, sunset, solar noon and twilight times for Indian cities or any coordinates.

See how long daylight lasts in any city on any date, and how it changed since yesterday.

Find the golden hour and blue hour times for photography in any Indian city.

Find the moon's phase, illumination and age for any date, and the next full and new moon.