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45 calculatorsPercentage CalculatorFind a percentage, compare values, or work out a change.Time CalculatorAdd or subtract durations. Get hours, minutes, and seconds.Square Footage CalculatorMeasure a rectangular space in square feet or meters.Tip CalculatorWork out the tip, total, and what each person pays.Aspect Ratio CalculatorSimplify dimensions or resize without changing proportions.Grade CalculatorCalculate your current grade from points or weighted scores.Fraction CalculatorAdd, subtract, multiply, divide and simplify exact fractions.GPA CalculatorFind a credit-weighted GPA on a 4.0 scale.Final Grade CalculatorFind the final exam score you need to reach your target.Age CalculatorFind calendar age and the days until your next birthday.Date CalculatorCount days between dates or add and subtract calendar days.Fuel Cost CalculatorEstimate trip fuel costs with metric, US or UK consumption units.Split Bill CalculatorSplit a bill equally with explicit tax and tip assumptions.Hours Between Times CalculatorFind the time between two clock readings, with overnight and break options.Time Card CalculatorTotal shift hours with unpaid breaks and explicit overnight settings.Overtime CalculatorEstimate gross pay with your own overtime threshold and rate multiplier.Business Days CalculatorCount working days with your own workweek, holidays and date boundaries.Food Cost CalculatorCost a recipe, convert ingredient units and scale quantities to your target servings.FOV CalculatorConvert FOV angles, match your monitor setup, or estimate camera coverage.Projectile Motion CalculatorEstimate flight time, range and maximum height for an ideal projectile.DPS CalculatorFind expected damage per second from attack rate and critical hits.Critical Hit CalculatorCalculate critical-hit damage and expected average damage per hit.XP Curve CalculatorBuild a linear or exponential XP progression with cumulative level totals.Concrete CalculatorEstimate concrete volume for a rectangular slab or footing, with extra allowance.Gravel CalculatorEstimate gravel volume and weight using an editable bulk density.Mulch CalculatorEstimate mulch in cubic yards and whole bags from area dimensions and depth.Paint CalculatorEstimate paint from wall area, openings, coats and product coverage.Binary ConverterConvert whole numbers exactly between binary, decimal, hexadecimal and octal.Download Time CalculatorEstimate transfer time with explicit byte, bit and binary file-size units.DPI / PPI CalculatorCalculate screen PPI, print dimensions, required pixels and image resolution.Audio Bitrate CalculatorCalculate audio bitrate, file size or recording time for PCM and compressed audio. Includes a video bitrate tool.Compound Interest CalculatorProject savings with monthly contributions, compare two interest rates and explore yearly growth.Paycheck CalculatorEstimate take-home pay using your own deductions and combined withholding rate.Salary CalculatorConvert hourly, daily, weekly, monthly and annual gross pay using your work schedule.Sales Tax CalculatorAdd a sales tax rate to an amount or recover the pre-tax amount from a total.Markup & Margin CalculatorCompare gross profit, markup on cost and profit margin on selling price.Triangle CalculatorSolve triangle sides, angles, area and perimeter with a diagram drawn to scale.Loan CalculatorEstimate monthly payments, total interest and the effect of extra payments, with an amortization schedule.Standard Deviation CalculatorFind sample or population standard deviation, variance and mean from a list of numbers.Subnet CalculatorCalculate an IPv4 network, subnet mask, broadcast address and usable host range from a CIDR prefix.Random Number GeneratorDraw random integers within an inclusive range, with optional unique results and a dice preset.BMI CalculatorCalculate adult body mass index from height and weight, with metric or imperial units.BMR CalculatorEstimate resting calorie expenditure with the Mifflin–St Jeor equation using age, height and weight.Calorie CalculatorEstimate daily maintenance calories from resting energy and an explicit activity assumption.Pace CalculatorConvert running pace, distance and time, with kilometer, mile and race-distance presets.