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

Temperature Converter

Convert temperature between Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), and Réaumur (°Ré) with visual thermometer display, reference points, and detailed conversion formulas.

Temperature Converter
⚡ Quick Presets

Embed Temperature Converter Widget

About Temperature Converter

Welcome to the Temperature Converter, a comprehensive tool for converting temperatures between Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), and Réaumur (°Ré). Whether you are cooking, studying science, checking weather in different countries, or working on engineering projects, this converter provides instant, accurate results with visual feedback and helpful reference points.

Temperature Scales Explained

Celsius (°C) - The Scientific Standard

Celsius, also known as centigrade, is the most widely used temperature scale globally. It was developed by Anders Celsius in 1742 and is based on the freezing point (0°C) and boiling point (100°C) of water at standard atmospheric pressure. Celsius is used in everyday life in most countries and is the standard in scientific research.

Fahrenheit (°F) - The American Standard

Fahrenheit was developed by Daniel Gabriel Fahrenheit in 1724. On this scale, water freezes at 32°F and boils at 212°F. It is primarily used in the United States, the Bahamas, Belize, the Cayman Islands, and Palau. The Fahrenheit scale provides more granularity for everyday temperatures, with 180 degrees between freezing and boiling.

Kelvin (K) - The Absolute Scale

Kelvin is the SI (International System of Units) base unit of temperature. It starts at absolute zero (-273.15°C), the theoretical point where all molecular motion stops. Kelvin uses the same increment size as Celsius (1K = 1°C) but has no negative values. It is essential in physics, chemistry, and astronomy.

Rankine (°R) - The Engineering Scale

Rankine is an absolute temperature scale like Kelvin but uses Fahrenheit-sized degrees. It starts at absolute zero (0°R = -459.67°F). Rankine is primarily used in American engineering for thermodynamic calculations, particularly in the aerospace and chemical engineering industries.

Réaumur (°Ré) - The Historical Scale

Réaumur was introduced by René Antoine Ferchault de Réaumur in 1730. On this scale, water freezes at 0°Ré and boils at 80°Ré. While largely obsolete today, it was once widely used in Europe and is still referenced in some historical contexts and cheesemaking.

Conversion Formulas

Celsius to Other Units

Celsius Conversions
$$°F = (°C \times \frac{9}{5}) + 32$$ $$K = °C + 273.15$$ $$°R = (°C + 273.15) \times \frac{9}{5}$$ $$°Ré = °C \times 0.8$$

Fahrenheit to Other Units

Fahrenheit Conversions
$$°C = (°F - 32) \times \frac{5}{9}$$ $$K = (°F - 32) \times \frac{5}{9} + 273.15$$ $$°R = °F + 459.67$$ $$°Ré = (°F - 32) \times \frac{4}{9}$$

Kelvin to Other Units

Kelvin Conversions
$$°C = K - 273.15$$ $$°F = (K - 273.15) \times \frac{9}{5} + 32$$ $$°R = K \times \frac{9}{5}$$ $$°Ré = (K - 273.15) \times 0.8$$

Common Temperature Reference Points

Reference Point Celsius Fahrenheit Kelvin Rankine
Absolute Zero -273.15°C -459.67°F 0 K 0°R
Water Freezing 0°C 32°F 273.15 K 491.67°R
Room Temperature 20°C 68°F 293.15 K 527.67°R
Human Body 37°C 98.6°F 310.15 K 558.27°R
Water Boiling 100°C 212°F 373.15 K 671.67°R

How to Use This Converter

  1. Enter the temperature: Type your temperature value in the input field. Decimals and negative numbers are supported.
  2. Select the source unit: Choose the unit of your input temperature from the dropdown menu.
  3. Click Convert: Press the button to instantly convert to all five temperature scales.
  4. View results: See the visual thermometer, temperature category, conversions to all units, and comparisons with common reference points.

Quick Reference: Temperature Ranges

Interesting Temperature Facts

Frequently Asked Questions

How do I convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8) and add 32. The formula is: °F = (°C × 9/5) + 32. For example, 25°C = (25 × 1.8) + 32 = 77°F.

What is the difference between Celsius and Kelvin?

Kelvin and Celsius have the same scale increment (1K = 1°C), but different zero points. Kelvin starts at absolute zero (-273.15°C), while Celsius uses water's freezing point as 0°C. To convert: K = °C + 273.15. Kelvin is used in scientific contexts because it has no negative values.

What is absolute zero?

Absolute zero is the lowest possible temperature where all molecular motion theoretically stops. It equals -273.15°C, -459.67°F, 0 K, and 0°R. No physical system can reach absolute zero, though scientists have achieved temperatures within billionths of a degree of it.

Why does the US use Fahrenheit instead of Celsius?

The US uses Fahrenheit for historical reasons. Daniel Fahrenheit created his scale in 1724, before Celsius (1742). While most countries adopted the metric system including Celsius, the US retained Fahrenheit for everyday use. Fahrenheit offers more granularity for weather temperatures (0-100°F covers typical weather), while Celsius is standard in science worldwide.

What temperature is the same in Celsius and Fahrenheit?

-40 degrees is the same in both Celsius and Fahrenheit (-40°C = -40°F). This is the only point where the two scales intersect. You can verify this using the conversion formula: (-40 × 9/5) + 32 = -72 + 32 = -40.

What is the Rankine temperature scale?

Rankine is an absolute temperature scale like Kelvin, but uses Fahrenheit-sized degrees instead of Celsius-sized degrees. It starts at absolute zero (0°R = -459.67°F). Rankine is primarily used in American engineering for thermodynamic calculations. To convert: °R = °F + 459.67 or °R = K × 9/5.

Related Resources

Reference this content, page, or tool as:

"Temperature Converter" at https://MiniWebtool.com/temperature-converter/ from MiniWebtool, https://MiniWebtool.com/

by miniwebtool team. Updated: Jan 30, 2026

Related MiniWebtools:

Air Conditioner BTU Calculator
Power Converter

Unit Converters:

Top & Updated:

Random Name PickerRandom PickerRelative Standard Deviation CalculatorSort NumbersFPS ConverterLine CounterBatting Average CalculatorMAC Address GeneratorRemove SpacesSaturn Return CalculatorInstagram User ID LookupMAC Address LookupFirst n Digits of PiFeet and Inches to Cm ConverterWord to Phone Number ConverterERA CalculatorPercent Off CalculatorSum CalculatorFacebook User ID LookupRandom Quote GeneratorSHA256 Hash GeneratorLog Base 10 CalculatorRandom Group GeneratorRandom Truth or Dare GeneratorBitwise CalculatorPhone Number ExtractorNumber of Digits CalculatorSquare Root (√) CalculatorYouTube Thumbnail DownloaderCm to Feet and Inches ConverterRoman Numerals ConverterTwitter/X Timestamp ConverterRandom Superpower GeneratorSlugging Percentage CalculatorSalary Conversion CalculatorOn Base Percentage CalculatorQuotient and Remainder CalculatorRandom IMEI GeneratorMP3 LooperMaster Number CalculatorAI ParaphraserOutlier CalculatorLove Compatibility CalculatorImage SplitterVideo to Image ExtractorBinary to Gray Code ConverterRandom Poker Hand GeneratorDecimal to BCD ConverterOPS CalculatorYouTube Earnings EstimatorSun, Moon & Rising Sign Calculator 🌞🌙✨Vertical Jump CalculatorAI Text HumanizerNumber to Word ConverterAI Punctuation AdderStandard Error CalculatorBCD to Decimal ConverterCompare Two StringsTime Duration CalculatorRemove AccentOne Rep Max (1RM) CalculatorAudio SplitterCompound Growth CalculatorPER CalculatorRandom Activity GeneratorOctal CalculatorModulo CalculatorNumber ExtractorDay of Year CalendarIP Address to Hex ConverterMerge VideosRandom Birthday GeneratorVideo CompressorGray Code to Binary ConverterExponential Decay CalculatorRandom Number PickerMartingale Strategy CalculatorReverse VideoShort Selling Profit CalculatorSocial Media Username CheckerRandom Movie PickerPercent Growth Rate CalculatorBinary to BCD ConverterDay of the Year Calculator - What Day of the Year Is It Today?CM to Inches ConverterRandom Time GeneratorAdd Prefix and Suffix to TextRandom Emoji GeneratorFirst n Digits of eRandom Fake Address GeneratorMAC Address AnalyzerRandom Coordinate GeneratorSHA512 Hash GeneratorLog Base 2 CalculatorConvolution CalculatorName Number CalculatorMercury Retrograde CalendarRandom Object GeneratorInvisible Text GeneratorList of Prime NumbersText FormatterEmail ExtractorURL ExtractorWHIP CalculatorSort Lines AlphabeticallyHex to BCD ConverterBCD to Binary ConverterLottery Number GeneratorBCD to Hex ConverterMedian CalculatorLeap Years ListList RandomizerBreak Line by CharactersAverage CalculatorPVIFA CalculatorWAR CalculatorHypotenuse CalculatorRemove Audio from VideoActual Cash Value CalculatorScientific Notation to Decimal ConverterAngel Number CalculatorRoot Mean Square CalculatorSum of Positive Integers CalculatorSHA3-256 Hash GeneratorAI Sentence Expander📅 Date CalculatorLbs to Kg ConverterHex to Decimal ConverterRandom String GeneratorRemove Leading Trailing SpacesAmortization CalculatorMarkup CalculatorPVIF 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 CalculatorFutoshiki GeneratorHashi (Bridges) Puzzle GeneratorSlitherlink Puzzle GeneratorWord Search Puzzle GeneratorCrossword Puzzle MakerCryptogram 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 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 CalculatorPuppy Weight PredictorChocolate Toxicity CalculatorDog Pregnancy CalculatorRaw Feeding CalculatorPet Insurance CalculatorDog Life Expectancy CalculatorJSON Formatter/ValidatorRegex TesterDiff CheckerJavaScript Minifier/BeautifierCSS BeautifierHTML BeautifierYAML Formatter/ValidatorCSV to JSON ConverterMarkdown EditorHTML to Markdown ConverterImage to Base64 ConverterCSS Box Shadow GeneratorIP Subnet CalculatorAPI TesterASCII Table ReferenceWebhook TesterSchema Markup GeneratorRobots.txt GeneratorXML Sitemap GeneratorOpen Graph CheckerDomain Age CheckerWHOIS LookupDNS LookupHeadline AnalyzerPage Speed CheckerRedirect CheckerHreflang Tag GeneratorDomain Trust CheckerBroken Link CheckerAI Content DetectorAI Blog Title GeneratorAI Email WriterAI Hashtag GeneratorAI Slogan GeneratorAI Article Outline GeneratorAI Token CounterInstagram Engagement Rate CalculatorTikTok Engagement Rate CalculatorYouTube Tag ExtractorYouTube Comment PickerInstagram Font GeneratorSocial Media Image Size GuideTikTok Money CalculatorYouTube Channel StatisticsTwitter/X Character CounterYouTube Watch Time CalculatorTwitch Earnings CalculatorYouTube Shorts Monetization CalculatorFacebook Ad Cost CalculatorSocial Media ROI CalculatorSocial Media Post Time OptimizerCTR CalculatorROAS CalculatorInfluencer ROI CalculatorForce CalculatorAcceleration CalculatorVelocity CalculatorMomentum CalculatorProjectile Motion CalculatorKinetic Energy CalculatorPotential Energy CalculatorWork and Power CalculatorDensity CalculatorPressure CalculatorIdeal Gas Law CalculatorFree Fall CalculatorTorque CalculatorHorsepower CalculatorDilution CalculatorChemical Equation BalancerStoichiometry CalculatorPercent Yield CalculatorEmpirical Formula CalculatorBoiling Point CalculatorTitration CalculatorMole/Gram/Particle ConverterLED Resistor CalculatorVoltage Divider CalculatorParallel Resistor CalculatorCapacitor Calculator555 Timer CalculatorWire Gauge CalculatorTransformer CalculatorRC Time Constant CalculatorPower Factor CalculatorDecibel (dB) CalculatorImpedance CalculatorResonant Frequency CalculatorGrade CalculatorFinal Grade CalculatorWeighted Grade CalculatorTest Score CalculatorSignificant Figures CalculatorStudy Timer (Pomodoro)Long Division CalculatorRounding CalculatorCompleting the Square CalculatorRatio Calculatorp-Value Calculator