Simplify Your Workflow: Search MiniWebtool.
Add Extension
Home Page > Miscellaneous > Unit Converters > File Size Converter

File Size Converter

Convert file sizes between all units (Bits, Bytes, KB, MB, GB, TB, PB) with binary (1024) and decimal (1000) standards. Includes visual size comparisons and instant all-unit conversion.

File Size Converter
⚡ Quick Presets

Embed File Size Converter Widget

About File Size Converter

The File Size Converter instantly converts file storage sizes between all common units including Bits, Bytes, Kilobytes (KB), Megabytes (MB), Gigabytes (GB), Terabytes (TB), and beyond. This tool supports both Binary (1024-based, IEC) and Decimal (1000-based, SI) standards, helping you understand why your hard drive shows less space than advertised and making accurate conversions for computing, storage, and networking applications.

Understanding File Size Units

File sizes are measured in units based on bytes. Each byte contains 8 bits and represents a single character or small piece of data. Larger units are multiples of bytes, but there are two different standards for these multiples:

Binary vs Decimal Standards
Binary (1024-based)
  • Used by operating systems
  • Based on powers of 2
  • 1 KiB = 1,024 bytes
  • 1 MiB = 1,048,576 bytes
  • IEC standard (KiB, MiB, GiB)
Decimal (1000-based)
  • Used by storage manufacturers
  • Based on powers of 10
  • 1 KB = 1,000 bytes
  • 1 MB = 1,000,000 bytes
  • SI standard (KB, MB, GB)

File Size Unit Reference Table

Unit Abbreviation Binary (Bytes) Decimal (Bytes)
Bitb1/81/8
ByteB11
KilobyteKB / KiB1,0241,000
MegabyteMB / MiB1,048,5761,000,000
GigabyteGB / GiB1,073,741,8241,000,000,000
TerabyteTB / TiB1,099,511,627,7761,000,000,000,000
PetabytePB / PiB~1.125 quadrillion1 quadrillion
ExabyteEB / EiB~1.152 quintillion1 quintillion

How to Use the File Size Converter

  1. Enter a value: Type the file size number you want to convert in the input field. Use the quick presets for common file sizes.
  2. Select the source unit: Choose the unit of your input value (Bits, Bytes, KB, MB, GB, TB, PB, or EB).
  3. Choose the standard: Select Binary (1024) for OS/computing or Decimal (1000) for storage/networking.
  4. Click Convert: View all conversions instantly. Click any result to copy it to your clipboard.

Why Does My Hard Drive Show Less Space?

This is one of the most common questions about file sizes. When you buy a "500 GB" hard drive, it contains 500,000,000,000 bytes (decimal). However, your operating system displays sizes in binary, so it shows approximately 465 GiB. This 7% difference becomes more noticeable with larger drives - a "1 TB" drive shows as about 931 GiB.

Common File Size Reference

Bits vs Bytes in Internet Speed

Internet speeds are usually measured in bits (Mbps - megabits per second), while file sizes are in bytes. To convert your download speed to file transfer rate, divide by 8. A 100 Mbps connection downloads at approximately 12.5 MB/s maximum speed.

Frequently Asked Questions

What is the difference between KB and KiB?

KB (Kilobyte) uses the decimal standard where 1 KB = 1,000 bytes. KiB (Kibibyte) uses the binary standard where 1 KiB = 1,024 bytes. Storage manufacturers typically use decimal (KB, MB, GB) while operating systems often use binary (KiB, MiB, GiB). This difference explains why a "500 GB" hard drive shows as "465 GB" in your computer.

Why does my hard drive show less space than advertised?

Hard drive manufacturers use decimal measurements (1 GB = 1,000,000,000 bytes) while operating systems use binary measurements (1 GiB = 1,073,741,824 bytes). A 1 TB drive (1,000,000,000,000 bytes) displays as approximately 931 GiB in your operating system. This 7% difference increases with larger drives.

How many bytes are in a megabyte?

In decimal (SI) standard: 1 MB = 1,000,000 bytes (used by storage manufacturers). In binary (IEC) standard: 1 MiB = 1,048,576 bytes (used by operating systems). Most people casually use "megabyte" to mean either, but for precise conversions, knowing which standard matters.

What is the largest file size unit?

Common large units include Exabytes (EB), Zettabytes (ZB), and Yottabytes (YB). 1 Exabyte = 1,000 Petabytes = 1 billion Gigabytes. As of 2024, global internet traffic is measured in Exabytes per month, and total world data is estimated at around 120 Zettabytes.

How do I convert bits to bytes?

Divide by 8. There are 8 bits in 1 byte. For example, 100 Mbps (megabits per second) internet equals 12.5 MB/s (megabytes per second) download speed. This is why your 100 Mbps connection downloads at around 12.5 MB per second maximum.

Additional Resources

Reference this content, page, or tool as:

"File Size Converter" at https://MiniWebtool.com/file-size-converter/ from MiniWebtool, https://MiniWebtool.com/

by miniwebtool team. Updated: Jan 27, 2026

Related MiniWebtools:

Is JavaScript Enabled?

Unit Converters:

Top & Updated:

Random PickerRandom Name PickerRelative Standard Deviation CalculatorLine CounterSort NumbersMAC Address GeneratorFPS ConverterBatting Average CalculatorMAC Address LookupERA CalculatorSum CalculatorWord to Phone Number ConverterFeet and Inches to Cm ConverterRemove SpacesPercent Off CalculatorFacebook User ID LookupRandom Truth or Dare GeneratorInstagram User ID LookupBitwise CalculatorRandom Quote GeneratorLog Base 10 CalculatorRandom IMEI GeneratorSHA256 Hash GeneratorOutlier CalculatorNumber of Digits CalculatorCm to Feet and Inches ConverterSalary Conversion CalculatorOn Base Percentage CalculatorFirst n Digits of PiSquare Root (√) CalculatorAI ParaphraserRoman Numerals ConverterMP3 LooperVideo to Image ExtractorQuotient and Remainder CalculatorText FormatterPhone Number ExtractorStandard Error CalculatorLeap Years ListBinary to Gray Code ConverterSlugging Percentage CalculatorSaturn Return CalculatorDecimal to BCD ConverterCompound Growth CalculatorSun, Moon & Rising Sign Calculator 🌞🌙✨One Rep Max (1RM) CalculatorNumber to Word ConverterMedian CalculatorRemove Lines Containing...Day of Year CalendarRandom Birthday GeneratorRemove AccentBCD to Decimal ConverterAI Punctuation AdderOPS CalculatorSHA512 Hash GeneratorAudio SplitterModulo CalculatorBonus CalculatorMerge VideosPercent Growth Rate CalculatorPER CalculatorCM to Inches ConverterRandom Superpower GeneratorReverse VideoTime Duration CalculatorExponential Decay CalculatorDay of the Year Calculator - What Day of the Year Is It Today?Compare Two StringsRemove Audio from VideoNumber ExtractorGray Code to Binary ConverterLove Compatibility CalculatorRandom Group GeneratorRandom Time GeneratorRatio to Percentage CalculatorScientific Notation to Decimal ConverterBinary to BCD ConverterMaster Number CalculatorLog Base 2 CalculatorCrossword Puzzle MakerFirst n Digits of eAverage Deviation CalculatorInvisible Text GeneratorList of Prime NumbersConvolution CalculatorIP Address to Hex ConverterURL ExtractorRandom Activity GeneratorRandom Movie PickerWhat is my Lucky Number?Random Meal GeneratorVideo CompressorProportion CalculatorAntilog CalculatorNatural Log CalculatorRandom Credit Card GeneratorSort Text By LengthVideo CropperRandom Poker Hand GeneratorOctal CalculatorEmail ExtractorAdd Prefix and Suffix to TextWHIP CalculatorSort Lines AlphabeticallyHex to BCD ConverterBCD to Binary ConverterLottery Number GeneratorBCD to Hex ConverterList RandomizerBreak Line by CharactersAverage CalculatorPVIFA CalculatorWAR CalculatorHypotenuse CalculatorActual Cash Value CalculatorAngel Number CalculatorRoot Mean Square CalculatorSum of Positive Integers CalculatorSHA3-256 Hash GeneratorAI Sentence Expander📅 Date CalculatorLbs to Kg ConverterHex to Decimal ConverterMAC Address AnalyzerRandom String GeneratorRemove Leading Trailing SpacesAmortization CalculatorMarkup CalculatorPVIF CalculatorName Number CalculatorDecimal to Hex ConverterDaily Time Savings CalculatorLorem Ipsum GeneratorReadability Score CalculatorKeyword Density CheckerBionic Reading ConverterText to Speech ReaderFancy Text GeneratorZalgo Text GeneratorUpside Down Text GeneratorASCII Art GeneratorList Difference CalculatorText Column ExtractorText to SQL List ConverterInvisible Character RemoverStock Average CalculatorPosition Size CalculatorMargin Call CalculatorShort Selling Profit CalculatorFutoshiki GeneratorHashi (Bridges) Puzzle GeneratorSlitherlink Puzzle GeneratorWord Search Puzzle GeneratorCryptogram GeneratorWord Scramble GeneratorWord Ladder GeneratorBingo Card GeneratorConnect the Dots GeneratorTip CalculatorCurrency Converter401(k) CalculatorRoth IRA CalculatorRetirement CalculatorSocial Security Benefits CalculatorPension CalculatorRMD CalculatorSIP CalculatorMutual Fund CalculatorStock Profit Loss CalculatorDividend Reinvestment CalculatorDollar Cost Averaging CalculatorBusiness Loan CalculatorPersonal Loan CalculatorDebt Payoff CalculatorDebt Consolidation CalculatorNet Worth CalculatorBudget CalculatorSavings Goal CalculatorEmergency Fund CalculatorMortgage Payoff CalculatorDown Payment CalculatorFHA Loan CalculatorHELOC CalculatorBreak-Even CalculatorBusiness Valuation CalculatorEmployee Cost CalculatorCrypto Profit/Loss CalculatorBitcoin Investment CalculatorIncome Tax CalculatorTax Bracket CalculatorTax Refund EstimatorCapital Gains Tax CalculatorSelf-Employment Tax Calculator1099 Tax CalculatorW-4 Withholding CalculatorProperty Tax CalculatorEstate Tax CalculatorChild Support CalculatorAlimony CalculatorTax-Equivalent Yield CalculatorRent vs Buy CalculatorRental Property CalculatorClosing Costs CalculatorReal Estate Commission CalculatorHouse Flipping Profit CalculatorHome Equity CalculatorIdeal Weight CalculatorBAC CalculatorProtein Intake CalculatorKeto CalculatorIntermittent Fasting CalculatorWeight Loss CalculatorGFR CalculatorCreatinine Clearance CalculatorBlood Pressure InterpreterHeight Percentile CalculatorLife Expectancy CalculatorBiological Age CalculatorBlood Type CalculatorBody Type CalculatorLean Body Mass CalculatorCarbohydrate CalculatorNet Carbs CalculatorHeart Disease Risk CalculatorCycling Speed CalculatorSwimming Pace CalculatorSteps to Distance CalculatorArmy Body Fat CalculatorStrength Standards CalculatorMarathon Pace CalculatorTriathlon Pace CalculatorBowling Score CalculatorGolf Handicap CalculatorVertical Jump CalculatorPace Zone CalculatorPregnancy Weight Gain CalculatorBaby Growth Percentile CalculatorBreastfeeding Calorie CalculatorGestational Age CalculatorPregnancy Calorie CalculatorRecipe ScalerCooking Unit ConverterRecipe Nutrition CalculatorCups to Grams ConverterMeat Smoking CalculatorTurkey Cooking Time CalculatorPizza Dough CalculatorSourdough CalculatorSous Vide CalculatorAir Fryer ConverterButter to Oil ConverterFresh to Dried Herb ConverterDog Food CalculatorMultiple Fraction Calculator

}, 300); })();