General Calculators

Find useful calculators for everyday dates, time, measurements, percentages and practical arithmetic.

Online Alarm Clock with SoundSet multiple browser alarms with sound, snooze, quick reminders, repeat schedules, labels and optional notifications.Battery Backup CalculatorEstimate battery backup time from battery capacity, voltage, electrical load, usable depth of discharge and system efficiency.Battery Charge Time CalculatorEstimate battery charge time from amp-hour capacity, charger current and charging efficiency, with optional energy and electricity cost figures.Days CounterUse our free Days Counter Online to calculate the exact number of days, weeks, months, years, hours, minutes, and seconds between two dates. Count weekdays,…Battery Charge Voltage and Amp CalculatorCalculate charging power, charging C-rate and an estimated idealized charge time from a battery capacity and charge voltage/current that you enter.Solar Battery Capacity CalculatorEstimate the battery amp-hour capacity needed for a solar or off-grid system from daily energy use, autonomy days, system voltage, depth of discharge and efficiency.Date Difference CalculatorThis date difference calculator is a tool used to calculate the difference between two given dates in terms of days, months, and years. It takes two dates…Dice RollerThis online dice roller is a tool to role one or two dices. It can be used for games, teaching probability, statistics, students or for other purposes that…Reverse Counting ToolPractice backward counting from 100 to 1, 50 to 1, 20 to 1, 10 to 1 or custom ranges with sound, spoken numbers, questions and printable worksheets.Digital Counter / Tally CounterCount animals, bags, boxes, pieces, people or inventory with large buttons, keyboard shortcuts, target progress and local auto-save.Easy CalculatorThis is a simple calculator where you can apply all the functions on same values at a time.Home Budget CalculatorThis calculator that helps you plan and manage your personal or household budget by estimating your income and expenses and showing you the difference…Hours CalculatorThis calculator that helps you convert between different units of time such as minutes, hours, days, weeks, and months, and also allows you to add or…Length Unit ConverterThis calculator that helps you convert between different units of length such as inches, feet, yards, meters, kilometers, and more.Leave Encashment CalculatorLeave Encashment Calculators streamline compensation for accrued but unused leave days. Learn how they work, who benefits, and when to use them for…Love Calculator with Name and Date of BirthCreate a repeatable positive love score using two names and dates of birth, with compliments and a downloadable result card.Photo Love Calculator with PicturesUpload two photos locally, enter names and create a positive love result card with photo previews, compliments and image download.Mother and Daughter Love CalculatorCelebrate a mother-and-daughter bond with a positive family score, warm compliment and downloadable result card.Marriage Love CalculatorA positive marriage compatibility calculator for entertainment with scores, thoughtful compliments and downloadable result cards.Love Calculator for Your CrushEnter your name and your crush’s name for a positive entertainment score, playful compliment and downloadable result image.Friendship Calculator for KidsA kid-friendly friendship calculator that gives only positive friendship scores and encouraging messages, with no romantic scoring.Love Calculator for Names, Friends and CouplesA positive-only love calculator for fun that creates a repeatable match score from the names entered, with compliments and a downloadable result card.Lucky Number CalculatorBest lucky number calculator to calculate your lucky number according to AaroofeAbjad.Random Number GeneratorThis random number generator, which is a tool that generates a random number or a set of random numbers within a specified range.Random Password GeneratorThis random password generator, which is a tool that generates a random and secure password, based on user-specified criteria such as length, complexity,…Food Recipe Scale CalculatorScale recipe ingredient quantities by changing the number of servings. Enter ingredients as one item per line to get proportional new amounts.Stop WatchThis stopwatch online timer is a handheld timepiece designed to measure the amount of time elapsed from a particular time when activated to when the piece…Sum CalculatorAuto Sum Calculator Online for All Kind of Sum Calculations with large and small amounts. You can use this auto sum calculator online for free.Online Timer with SoundSimple Online Web Timer That can be used as stop watch, time counter, and time calculator also available.Child Support Increase CalculatorChild Support Increase Calculator (Court Ordered).Math Equation Solving CalculatorOpen this calculator for a fast, private and easy calculation experience.Unit Conversion CalculatorEngineering conversion calculator for all types of conversions like weight, air, speed, lenght etc Fitrana Calculator for MuslimsFitrana Calculator for Muslims OfficeCalculator.Net Production Calculator for KnittingProduction calculator for knitting by OfficeCalculator.Net Production Calculator for WeavingThe Weaving Production Calculator is a valuable tool designed to assist weavers in estimating the width of their woven pieces accurately by OfficeCalculator.Net Carding Production Calculator for TextileCarding Production Calculator – a practical tool designed to assist in predicting the production output based on key parameters Construction Material CalculatorsOfficeCalculator.Net Stair Planning CalculatorThe Stairs Planning Calculator is a tool designed to help you plan and design a straight staircase with uniform riser height and tread depth.Electricity Consumption CalculatorCalculate daily and monthly electricity consumption in kWh from appliance wattage, quantity and use time, with an optional electricity-rate cost estimate.Positive Love Calculator PrankCreate a harmless high love-match prank result from two names, always between 70% and 99%, with a playful compliment and downloadable card.Husband and Wife Love CalculatorA positive husband-and-wife love calculator for entertainment, with repeatable scores, warm compliments and downloadable result cards.How Lovely Are You? Compliment CalculatorCreate a positive lovely score from a name and receive a cheerful compliment with a shareable, downloadable result card.Mosque Income CalculatorOfficeCalculator.Net Concrete Slab Material CalculatorBest calculator to calculate the quantity of concrete slab materials, rcc slab material calculator, roof slab, paving slab material calculator, slab casting…Concrete Material CalculatorBest calculator to calculate concrete quanitity/requirement/use for column, slab, beam, bars, garden, floor, etc Paint CalculatorPaint Calculator to calculation the paint required for your needs, domestic and commercial needs Guage to MM, Inches, Sooter CalculatorQuicly convert steel guage to mm, cm, microns, inches, and soot etc. Its a free tool to convert guage to other measurements.Dimension Calculator for Scalling PixelsScale width and height proportionally or non-proportionally in pixels with ease. Free online pixel dimension calculator.Dimension Surface Tension CalculatorSurface Tension Calculator, Dimension surface tension calculator, formula, units, dimension of tension etc by OfficeCalculator.Net Time Duration CalculatorCalculate hours between times or full date-times, including overnight intervals, seconds and decimal-hour totals.Wall Bricks CalculatorCalculate the number of bricks required to build a wall with accurate dimensions, including wall thickness and cement thickness. Perfect for construction…Tiles CalculatorFree tile calculator for floors and walls. Calculate the exact number of tiles needed in square feet or meters, including grout gaps and waste. Get cost…Truck Material/Load CalculatorFree online truck volume calculator for construction materials, raw goods & bulk items. Calculate cubic feet & meters for square & sloped trucks. Optimize…Liquid Volume CalculatorFree online calculator to measure liquid volume in tanks of all shapes - rectangular, cylindrical, spherical, cube. Perfect for calculating petrol, diesel,…Meeting Cost CalculatorFree Meeting Cost Calculator – Estimate how much your meetings cost based on attendee salaries and duration. Optimize time management and reduce unnecessary…Text Calculator Online for FreeFree online text analyzer tool - count words, characters, sentences, paragraphs, analyze links and get readability stats. Perfect for writers and SEO…Business Date CalculatorAdd or subtract business days from a date while excluding configured weekends and optional holiday dates.Working Hours Between Dates CalculatorCalculate working hours between two date-times using a daily work schedule, optional break, weekends, and holiday exclusions.GPA CalculatorCalculate credit-weighted GPA from course grade points and course credit values.Grade CalculatorCalculate grade percentage, common letter grade, and pass status from earned points, total points, and a passing target.Add or Subtract Working Days CalculatorAdd or subtract business days from a date while excluding selected weekends and optional holidays.Decimal Hours to Hours and Minutes CalculatorConvert decimal hours into hours, minutes, and seconds for timesheets, payroll, billing, and scheduling.Hours and Minutes to Decimal Hours CalculatorConvert hours, minutes, and seconds into decimal hours for payroll, billing, spreadsheets, and time reports.Week Number CalculatorFind the ISO week number, ISO week-year, weekday, and day of year for any date.Weekday Finder CalculatorFind the day of the week for any valid date and see its day number within the year.Countdown Calculator Between Two Dates and TimesCalculate the exact duration between a starting date-time and a target date-time in days, hours, minutes, and seconds.Time Zone ConverterConvert a local date and time between major world time zones using browser time-zone rules.International Meeting Time CalculatorCompare one meeting instant across multiple world time zones for remote teams, clients, and international calls.SLA Business Hours Deadline CalculatorCalculate an SLA deadline from business hours while respecting workday hours, weekends, and optional holidays.Project Duration CalculatorCalculate calendar span and working days between project start and end dates with weekend and holiday exclusions.◫Dimension Scaling CalculatorScale three dimensions by a common factor and calculate the resulting dimensions, area factor and volume factor.→◫Engineering Unit Conversion CalculatorConvert one value between common engineering measurement units using explicit conversion factors and temperature equations.→◫Length Conversion CalculatorConvert a length entered in inches, millimeters, centimeters, feet, yards, meters, kilometers or miles and see several equivalent units together.→◫Marathon Pace CalculatorCalculate pace per mile, pace per kilometer and average speed from a race distance and elapsed time, with a marathon preset available.→◫Running Pace CalculatorCalculate pace per kilometer and per mile, average speed, and simple projected 5K/10K times from distance and elapsed time.→Mileage & Travel Distance CalculatorCalculate trip distance from odometer readings, fuel economy from fuel used and average speed from travel time.Golf Handicap CalculatorCalculate a WHS score differential and estimate a Handicap Index from 3–20 score differentials using current USGA rules.

Complete category directory

Additional Office & Property Tools

These tools are included here so every public calculator can be discovered from a relevant category page.

Floor Coating CalculatorFree floor coating calculator for epoxy, polyurea, polyaspartic & concrete sealers. Calculate exact coating gallons/liters needed,…Floor Covering CalculatorFree floor covering calculator for hardwood, laminate, vinyl, tile & carpet. Calculate exact material needed, waste percentage, and…Password Checker OnlineAnalyzie the strength, strongness, length, and other factores of your password. Whether its safe to use or not.

Calculator Games

Practice arithmetic, number logic, money math, memory and numeric keypad speed with eight free browser games.

Play Calculator Games →

School & Workday Planning Calculators

New focused calculators added in the final roadmap batch.

School Days CalculatorCount estimated school days between two dates after excluding the selected weekend pattern and entered school holidays or closure dates.Workday Deadline CalculatorAdd a chosen number of working days to a start date while excluding weekends and optional holiday dates.

Trending & Newly Added Calculators

Added or improved from the supplied Google Trends search data, with transparent formulas and editable assumptions where rates can change.

Birthday CalculatorNext birthday and exact age.IELTS Band CalculatorOverall band score rounding.

More calculators

Tip CalculatorCalculate tip, total bill, group split and rounding.Fuel Cost CalculatorEstimate trip fuel, tolls, parking and per-person cost.Tire Size CalculatorCompare two metric tire sizes and calculate sidewall height, overall diameter, circumference, revolutions per mile and estimated speedometer difference.

Kids Calculator & Math Practice

Open the dedicated Kids section for a big-button calculator, addition, subtraction, multiplication, division, counting, times tables, fractions, money, time, number patterns and math games.

Uses of General Category Calculators

General category calculators can be used for a wide range of purposes, including:

Mathematics: General category calculators can be used to perform basic arithmetic operations such as addition, subtraction, multiplication, and division, as well as more advanced mathematical operations such as square roots, logarithms, and trigonometric functions.

Finance: General category calculators can be used to perform financial calculations, such as calculating loan payments, determining the future value of an investment, or determining the return on investment for a given period of time.

Science: General category calculators can be used to perform scientific calculations, such as converting between different units of measurement, calculating the density of a substance, or determining the velocity of an object.

Engineering: General category calculators can be used to perform engineering calculations, such as calculating the force required to lift a given object, determining the strength of a beam, or calculating the torque required to rotate a shaft.

Cooking: General category calculators can be used to convert recipes from one serving size to another, calculate the nutritional content of a recipe, or determine the cooking time for a particular food.

Other: General category calculators can be used for a wide range of other purposes, including calculating the volume of an object, determining the fuel efficiency of a vehicle, or calculating the cost of a project.

Start with the quantity you need

Everyday questions can involve dates, units, percentages, dimensions or counts. The age calculator works with calendar dates, while the time duration calculator works with elapsed time. The percentage calculator handles relative amounts and changes.

A percentage and a fixed amount

Adding 10% to 200 gives 220 because the added amount is 200 × 0.10 = 20. Adding a fixed amount of 10 instead gives 210. Keep that distinction in mind when interpreting a discount, increase or allowance described as a percentage.

Prepare inputs for a repeatable answer

Check the unit and time period printed beside each field. A monthly value, an annual value and an amount per item describe different bases. For dates, decide whether the question concerns full elapsed days or an inclusive count of dates. For physical measurements, use the same measurement system for all dimensions unless the tool explicitly provides separate unit selectors.

Review the method and supporting values before saving a result. If an answer looks unexpectedly large or small, test a simple input that you can calculate manually. The main Office Calculator is available for ordinary arithmetic when a dedicated tool is unnecessary.