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Everyday Calculators
Dates, time, school, travel and tech tools for daily life.
Quick tools for the small calculations that come up every week: date gaps, working days, time zones, grades, tips, fuel costs and more. Everything runs in your browser.
Date CalculatorAdd or subtract years, months, weeks and days from a date and see the weekday.Days Between Dates CalculatorDays, weeks, months and years between two dates, with an include-end-date option.Day of the Week CalculatorWeekday, day of year, ISO week number and leap year check for any date.Business Days CalculatorWorking days between dates or after adding working days, with custom weekends and holidays.Time CalculatorAdd or subtract two durations in days, hours, minutes and seconds.Hours CalculatorWeekly timesheet: start and end times, breaks and overnight shifts, total hours and optional pay.Time Zone ConverterConvert a date and time between 36 zones with daylight saving handled for the exact date.GPA CalculatorTerm and cumulative GPA from letter grades and credit hours on the 4.0 scale.Grade CalculatorWeighted course grade from scores and weights, with the best and worst case still possible.Final Grade CalculatorScore needed on the final exam to reach a target course grade, with a table of common targets.CGPA to Percentage CalculatorConvert CGPA to percentage and back with a selectable multiplier or ratio rule.Tip CalculatorTip, total and per-person share, with pre-tax tipping, rounding and a comparison table.Gas Mileage CalculatorFuel economy from distance and fuel used: US and UK mpg, L/100 km, km/L and cost per distance.Fuel Cost CalculatorTrip fuel needed and cost from distance, fuel economy and price, with round trip and cost split.Speed Distance Time CalculatorSolve for speed, distance or time with km, miles, knots and m/s, plus pace per km and per mile.Password GeneratorRandom passwords from your browser's crypto source, with length, character sets and entropy shown.Subnet CalculatorIPv4 CIDR subnet details: network, broadcast, mask, usable host range, and optional subnet split.Download Time CalculatorEstimate download or upload time from file size and connection speed, with an efficiency setting.Aspect Ratio CalculatorReduce width and height to a ratio, or scale an image or video to a new size without distortion.Screen PPI CalculatorPixels per inch, dot pitch, physical screen size and viewing distance from resolution and diagonal.Word CounterCount words, characters, sentences and paragraphs, estimate reading time, and see top words.Electricity Cost CalculatorAppliance energy use in kWh and running cost per day, month and year from watts, hours and tariff.Unit Price CalculatorCompare up to four products by price per kg, litre, ounce or item, with sizes in mixed units.
Accuracy note: Results are calculated in your browser from the values you enter. Check anything that matters for legal, academic or financial purposes against the official source.