Other Calculators
Age, date, time, and other everyday calculators that don't fit the main categories.
- Age CalculatorCalculate age or the interval between two dates in years, months, and days — and as total months, weeks, days, hours, minutes, and seconds.
- Date CalculatorFind the days between two dates — in years, months, days, total weeks, and business days — or add and subtract years, months, weeks, and days from a date.
- Time CalculatorAdd or subtract time in days, hours, minutes, and seconds — between two time values, from a starting date and time, or from a free-text time expression.
- Hours CalculatorFind hours and minutes between two clock times or two dates — clock in and clock out, including overnight shifts.
- Tip CalculatorCalculate a tip and total for a bill at common percentages, or split the tip and total among a group.
- Discount CalculatorFind the sale price, amount saved, or original price from a percent-off or fixed-amount discount. Enter any two values to solve the rest.
- GPA CalculatorCalculate a credit-weighted GPA from letter, percentage, or point grades — plus the GPA you need on upcoming credits to hit a target.
- Grade CalculatorFind a weighted course grade from numbered or letter scores, and the grade you need on remaining work or the final exam.
- Sleep CalculatorFind when to go to bed or wake up using complete sleep cycles, or from a chosen sleep length — including time to fall asleep.
- Fuel Cost CalculatorEstimate the fuel a trip will use and what it will cost, from distance, fuel efficiency, and the pump price — in miles or kilometers, mpg, L/100 km, km/L, or liters per mile.
- Square Footage CalculatorFind the square footage of a rectangle, circle, triangle, trapezoid, sector, or parallelogram — plus borders and rings — and optionally price the area.
- Conversion CalculatorConvert length, temperature, area, volume, and weight between metric, US customary, and imperial units. See the result and the same amount in every unit of that category.
- Volume CalculatorFind the volume of a sphere, cone, cube, cylinder, tank, capsule, spherical cap, frustum, ellipsoid, pyramid, or tube. Mixed length units print a cubic result in each unit.
- Area CalculatorFind the area of a rectangle, triangle, trapezoid, circle, sector, ellipse, or parallelogram. Mixed length units print a square result in each unit.
- Concrete CalculatorEstimate concrete volume, weight, and 60/80 lb bags for slabs, walls, holes, columns, tubes, curbs, and stairs.
- Password GeneratorGenerate a strong random password on this device. Nothing is sent to a server — length, character sets, entropy, and strength stay in your browser.