All free online calculators
Browse 36 calculators for personal finance, gaming, technology and math. Search by task to find formulas, examples and instant results.
36 calculators · instant answers
Featured calculators
A handpicked starting point for everyday calculations.
Gaming & Tech Calculators ↗
Calculate download times, PC power costs, storage, streaming data use and frame times.
Download Time Calculator
Estimate file download time from its size and your connection speed. Compare the theoretical minimum with an adjustable real-world transfer estimate.
↗TransfersGame Download Time Calculator
Plan a game download using size presets or the download size shown in your launcher. The estimate covers the network transfer, not unpacking or installation.
↗TransfersUpload Time Calculator
Estimate how long a video, file or backup takes to upload. Use your upload speed and adjust the usable bandwidth for a realistic planning scenario.
↗TransfersMbps to MB/s Converter
Understand the difference between connection speed and transfer speed.
↗PowerPC Electricity Cost Calculator
Estimate your computer’s daily, monthly and annual electricity cost from average wall power, hours of use and your energy tariff. See both kWh and cost.
↗PowerGaming PC Electricity Cost Calculator
Calculate the cost of running a gaming PC with separate gaming and idle power levels. Add the energy used in each state to estimate daily, monthly and yearly cost.
↗PowerPSU Wattage Calculator
Add estimated component loads to see a power-supply planning range. Wattage and headroom alone do not establish hardware compatibility.
↗PowerUPS Runtime Calculator
Estimate ideal battery-backup time from stored energy and connected load. Compare this approximation with your UPS manufacturer’s runtime curve.
↗StorageVideo File Size Calculator
Estimate video storage from duration and combined video and audio bitrate. Resolution and frame rate provide context; bitrate determines the size.
↗StorageStreaming Data Usage Calculator
Estimate how much data streaming uses per hour and over your viewing schedule. Compare a sustained bitrate with your monthly data allowance.
↗StorageStorage Calculator
How many games or files fit on your drive?
↗DisplayFrame Time Calculator
Convert frames per second to milliseconds per frame. Compare frame durations at common rates without confusing frame time with total input latency.
↗Finance Calculators ↗
Calculate loan payments, savings growth, debt payoff and gross income. Compare the numbers behind everyday money questions.
Mortgage Calculator
Estimate monthly principal and interest, total interest and repayment on a fixed-rate mortgage. Add property tax, insurance and HOA charges only if you want them included.
↗LoansLoan Calculator
Calculate monthly payments and total interest for a fixed-rate loan. Compare extra principal payments and inspect the repayment schedule.
↗LoansCar Loan Calculator
Estimate monthly car payments after a down payment, net trade-in credit and financed fees. See the amount financed and total interest separately.
↗SavingsCompound Interest Calculator
Project a future balance from an initial investment, monthly contributions and an assumed interest rate. Compare compounding frequencies and separate your deposits from interest earned.
↗SavingsSavings Goal Calculator
Find the monthly saving needed to reach your target.
↗DebtDebt Payoff Calculator
Find how many monthly payments clear a balance at a fixed rate. Compare paying more and see total interest without adding new borrowing.
↗DebtCredit Card Payoff Calculator
Estimate when a credit card balance reaches zero with a fixed monthly payment and no new purchases. Compare larger payments using a simplified monthly-interest model.
↗IncomeHourly to Salary Calculator
Convert an hourly wage to weekly, monthly and annual gross income. Adjust paid hours and weeks to account for part-time work or unpaid time off.
↗IncomeSalary to Hourly Calculator
Find the hourly equivalent of your annual salary.
↗IncomePay Raise Calculator
See what your new salary means each month.
↗IncomeOvertime Calculator
Calculate regular and overtime pay together.
↗EverydayTip Calculator
Calculate a tip and each person’s share of the bill. Choose your percentage, optionally exclude included tax from the tip basis, and see any rounding remainder.
↗Math Calculators ↗
Work out percentages, simplify fractions and ratios, summarize data and measure shapes.
Percentage Calculator
Find a percentage of a number, express one value as a percentage of another, apply an increase or decrease, or calculate the change between two values.
↗PercentagesPercentage Change Calculator
Measure the increase or decrease between two values.
↗FractionsFraction Calculator
Add, subtract, multiply or divide two fractions and reduce the answer to simplest form. Enter whole-number numerators and nonzero denominators.
↗FractionsDecimal to Fraction Calculator
Express a finite decimal as a simplified fraction.
↗FractionsFraction to Decimal Calculator
Convert a fraction into decimal notation.
↗RatiosRatio Calculator
Reduce a ratio to its simplest form.
↗RatiosProportion Calculator
Find the missing value in a proportion.
↗StatisticsAverage Calculator
Find the mean, median, mode and range of your numbers. Compare the centre of a dataset with its smallest and largest values.
↗StatisticsStandard Deviation Calculator
Measure the spread of a dataset using population or sample standard deviation. See variance and the mean alongside the result.
↗GeometryArea Calculator
Calculate the area of common shapes.
↗GeometryVolume Calculator
Find the volume of solids, from boxes to spheres.
↗GeometryPythagorean Theorem Calculator
Find the hypotenuse of a right triangle.
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