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:

0–60 / Quarter Mile CalculatorNew
24 Game Solver & Trainer
Air Conditioner BTU Calculator
Air Fryer Converter
Angle Converter
Beer Chill Time Calculator
BMI Calculator
Boiling Point CalculatorNew
Clothing Size ConverterNew
💧 Dew Point CalculatorNew

Unit Converters:

Top & Updated:

Random PickerRandom Name PickerInstagram User ID LookupLine CounterFPS ConverterRelative Standard Deviation CalculatorSort NumbersMAC Address GeneratorBatting Average CalculatorRemove SpacesERA CalculatorFacebook User ID LookupImage ResizerFeet and Inches to Cm ConverterWord to Phone Number ConverterRandom Truth or Dare GeneratorMAC Address LookupSum CalculatorBitwise CalculatorRandom Quote GeneratorSun, Moon & Rising Sign Calculator 🌞🌙✨Square Root (√) CalculatorSlope and Grade CalculatorPercent Off CalculatorMP3 LooperRandom Credit Card GeneratorNumber of Digits CalculatorOPS CalculatorAudio SplitterSHA256 Hash GeneratorLog Base 10 CalculatorWord Ladder GeneratorMaster Number CalculatorInvisible Text GeneratorRandom Superpower GeneratorHalfway Date CalculatorAI Text HumanizerRoman Numerals ConverterRandom IMEI Generator⬛ Aspect Ratio CalculatorMerge VideosPhone Number ExtractorCm to Feet and Inches Converter📷 OCR / Image to TextVertical Jump CalculatorOn Base Percentage CalculatorSlugging Percentage CalculatorSalary Conversion CalculatorRandom Activity GeneratorFile Size ConverterSaturn Return CalculatorRandom Fake Address GeneratorRandom Poker Hand GeneratorText FormatterNumber to Word ConverterCaffeine Overdose CalculatorRandom Meal GeneratorRandom Movie PickerRandom Birthday GeneratorCompound Growth CalculatorOctal CalculatorBCD to Decimal ConverterRandom Loadout GeneratorBinary to Gray Code ConverterVideo to Image ExtractorCompare Two StringsAdd Prefix and Suffix to TextDecimal to BCD ConverterName Number CalculatorLove Compatibility CalculatorRandom Writing Prompt Generator📅 Date CalculatorCM to Inches ConverterLeap Years ListConnect the Dots GeneratorArc Length CalculatorImage SplitterAcreage CalculatorPercent Growth Rate CalculatorRandom Object GeneratorYouTube Channel StatisticsStair CalculatorQuotient and Remainder CalculatorWAR CalculatorIP Subnet CalculatorAdd Text to ImageFirst n Digits of PiTime Duration CalculatorBattery Life CalculatorImage CompressorBingo Card GeneratorURL ExtractorWHIP CalculatorGray Code to Binary ConverterAstrological Element Balance CalculatorProportion CalculatorDay of the Year Calculator - What Day of the Year Is It Today?Small Text Generator ⁽ᶜᵒᵖʸ ⁿ ᵖᵃˢᵗᵉ⁾What is my Lucky Number?Remove AccentSteel Weight CalculatorVideo CompressorRemove Leading Trailing Spaces🖱️ Click CounterSHA512 Hash GeneratorMercury Retrograde CalendarRatio to Percentage CalculatorMartingale Strategy CalculatorRandom User-Agent GeneratorLong Division CalculatorList of Prime NumbersOutlier CalculatorLottery Number GeneratorSocial Media Username CheckerNumber ExtractorDay of Year CalendarPER CalculatorAI Punctuation AdderBinary to BCD ConverterRandom Time Generator🔍 Plagiarism Checker🎰 Gacha Pity CalculatorAngel Number CalculatorRandom Chess Opening GeneratorBonus CalculatorHeight Percentile CalculatorIP Address to Hex ConverterGrade CalculatorBreak Line by CharactersWhat is my Zodiac Sign?AI Language DetectorMAC Address AnalyzerRandom Emoji GeneratorRandom Group GeneratorBolt Torque CalculatorHypotenuse CalculatorTaco Bar CalculatorTrigonometric Equation SolverFlip VideoBroken Link CheckerRandom Chord GeneratorWeight Loss CalculatorEmail ExtractorBoiling Point CalculatorMorse Code GeneratorP/E Ratio CalculatorCone Flat Pattern (Template) GeneratorRandom Number PickerVideo SplitterMandelbrot Set ExplorerSquare Numbers ListList RandomizerBcrypt Hash Generator / CheckerShort Selling Profit CalculatorWord Scramble GeneratorModulo CalculatorRock Paper Scissors GeneratorAI ParaphraserPercent to PPM ConverterYouTube Comment PickerAdjust Video SpeedMiter Angle CalculatorFraction CalculatorRandom PIN GeneratorAntilog CalculatorFence CalculatorRandomize NumbersYouTube Tag ExtractorMultiple Fraction CalculatorPVIF CalculatorRandom Tournament Bracket GeneratorConvolution CalculatorDMS to Decimal Degrees ConverterMolarity CalculatorExponential Decay CalculatorRadical Simplifier🔊 Tone GeneratorDecking CalculatorBCD to Binary ConverterHow Long Ago CalculatorNumber RandomizerRemove Audio from VideoEstimation CalculatorPVIFA CalculatorSort Lines AlphabeticallyColor InverterRounding CalculatorDice Roll Probability CalculatorSum of Positive Integers CalculatorAmortization CalculatorGamma Function CalculatorLife Path Number CalculatorRandom Name GeneratorReverse VideoAverage Deviation CalculatorFirst n Digits of ekg to lbs ConverterRemove Lines Containing...Hex to BCD ConverterBCD to Hex ConverterMedian CalculatorStandard Error CalculatorAverage CalculatorActual Cash Value CalculatorScientific Notation to Decimal ConverterLog Base 2 CalculatorRoot Mean Square CalculatorSHA3-256 Hash GeneratorAI Sentence ExpanderLbs to Kg ConverterHex to Decimal ConverterRandom String GeneratorMarkup CalculatorDecimal to Hex ConverterInstagram Font GeneratorSocial Media Image Size GuideTikTok Money CalculatorTwitter/X Character CounterTwitter/X Timestamp ConverterYouTube 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 CalculatorTitration CalculatorMole/Gram/Particle ConverterIrregular Polygon Area CalculatorFrustum CalculatorTorus Calculator3D Distance CalculatorGreat Circle Distance CalculatorCircumscribed Circle (Circumcircle) CalculatorInscribed Circle (Incircle) CalculatorAngle Bisector CalculatorTangent Line to Circle CalculatorHeron's Formula CalculatorCoordinate Geometry Distance CalculatorVolume of Revolution CalculatorSurface of Revolution CalculatorParametric Curve GrapherRiemann Sum CalculatorTrapezoidal Rule CalculatorSimpson's Rule CalculatorImproper Integral CalculatorL'Hôpital's Rule CalculatorMaclaurin Series CalculatorPower Series CalculatorSeries Convergence Test CalculatorInfinite Series Sum CalculatorAverage Rate of Change CalculatorInstantaneous Rate of Change CalculatorRelated Rates SolverOptimization Calculator (Calculus)Gradient Calculator (Multivariable)Divergence CalculatorCurl CalculatorLine Integral CalculatorSurface Integral CalculatorJacobian Matrix CalculatorNewton's Method CalculatorRREF Calculator (Row Echelon Form)Matrix Inverse CalculatorMatrix Multiplication CalculatorDot Product CalculatorCross Product CalculatorVector Magnitude CalculatorUnit Vector CalculatorAngle Between Vectors CalculatorNull Space CalculatorColumn Space CalculatorCramer's Rule CalculatorMatrix Diagonalization CalculatorQR Decomposition CalculatorCholesky Decomposition CalculatorMatrix Power CalculatorCharacteristic Polynomial CalculatorBayes' Theorem CalculatorF-Test / F-Distribution CalculatorHypergeometric Distribution CalculatorNegative Binomial Distribution CalculatorGeometric Distribution CalculatorExponential Distribution CalculatorWeibull Distribution CalculatorBeta Distribution CalculatorSpearman Rank Correlation CalculatorFisher's Exact Test CalculatorContingency Table CalculatorOdds Ratio CalculatorTip Splitter (Advanced)Lease vs Buy CalculatorHourly Rate Calculator (Freelancer)Invoice Late Fee CalculatorESPP CalculatorStock Split CalculatorOptions Probability CalculatorDollar to Gold ConverterBeam Load CalculatorPipe Flow CalculatorGravel, Sand & Topsoil CalculatorRandom Sentence GeneratorRandom Paragraph GeneratorRandom Math Problem GeneratorRandom Bible Verse GeneratorRandom Cat/Dog Name GeneratorRandom Debate Topic GeneratorBody Recomposition CalculatorAlcohol Calorie CalculatorMedication Dosage CalculatorPace to Calories CalculatorHydration CalculatorTrain Meeting Problem SolverAge Word Problem SolverMixture Problem SolverWork Rate Problem SolverDistance-Speed-Time Triangle CalculatorCoin Word Problem SolverNumber Bonds GeneratorCarry and Borrow VisualizerTimes Tables QuizMental Math TrainerRoman Numeral Math SolverEgyptian Multiplication CalculatorVedic Math Tricks CalculatorRussian Peasant MultiplicationSoroban Abacus SimulatorAnnuity Payout CalculatorReverse Mortgage CalculatorVariable Annuity CalculatorFixed Indexed Annuity CalculatorBond Convexity CalculatorBond Duration Calculator (Macaulay & Modified)Forward Rate CalculatorMortgage Recast CalculatorTreasury Inflation-Protected Securities (TIPS) CalculatorStock Beta CalculatorTreynor Ratio CalculatorSortino Ratio CalculatorDoppler Effect CalculatorSpring Constant CalculatorPendulum Period CalculatorCentripetal Force CalculatorAngular Velocity CalculatorMoment of Inertia CalculatorSnell's Law CalculatorCoulomb's Law CalculatorElectric Field CalculatorMagnetic Field of Wire CalculatorLens Equation CalculatorA/B Test Significance CalculatorA/B Test Sample Size CalculatorConversion Rate CalculatorCustomer Lifetime Value (CLV) CalculatorCustomer Acquisition Cost (CAC) CalculatorChurn Rate CalculatorRetention Rate Cohort CalculatorNPS (Net Promoter Score) CalculatorPareto Chart GeneratorSix Sigma Process Capability CalculatorTessellation GeneratorSpirograph GeneratorVoronoi Diagram GeneratorDelaunay Triangulation GeneratorL-System Fractal GeneratorJulia Set GeneratorPolar Equation Plotter3D Surface PlotterSierpinski Triangle GeneratorcURL Command BuilderHTTP Status Code ReferenceUUID Validator/DecoderURL ParserQuery String BuilderSVG to React/JSX ConverterSCSS to CSS CompilerLess to CSS CompilerTypeScript PlaygroundJSON Schema GeneratorImage to ASCII Art ConverterImage to SVG TracerLipogram CheckerPangram CheckerAcronym GeneratorBackronym GeneratorPig Latin TranslatorEXIF Data Viewer/RemoverROT13 Encoder/DecoderAtbash Cipher ToolVigenère Cipher ToolPronunciation IPA ConverterHemingway-Style Readability EditorSentence Length Variance AnalyzerWord Frequency AnalyzerBusiness Days CalculatorAdd Business Days to DateDate Pattern GeneratorHow Long Until CalculatorBirthday Across Cultures CalculatorLunar Calendar ConverterHijri Calendar ConverterHebrew Calendar ConverterInsulin Sensitivity Factor CalculatorCarb-to-Insulin Ratio CalculatorLean Body Mass to Strength CalculatorOne-Mile Walk Test (Rockport) CalculatorCooper 12-Minute Run CalculatorFFMI CalculatorAPGAR Score CalculatorGlasgow Coma Scale CalculatorWells Score Calculator (DVT/PE)Tennis Score TrackerSoccer xG (Expected Goals) CalculatorCricket Run Rate CalculatorRugby Points CalculatorBoxing Punch Power CalculatorRace Time PredictorSwimming SWOLF CalculatorYoga Pose Hold TimerFishing Knot Strength CalculatorBike Gear Ratio CalculatorClimbing Grade ConverterWine Pairing SuggesterStandard Drink CalculatorCaffeine Half-Life TrackerSpice Substitution FinderDietary Restriction Recipe FilterMarinade Time CalculatorFermentation Time CalculatorSmoking Wood Pairing GuideFreelance Project Pricing CalculatorSaaS Pricing CalculatorSubscription Cost TrackerSide Hustle ROI CalculatorRemote Work Savings CalculatorCoffee Habit Cost CalculatorGym vs Home Workout Cost CalculatorLunch Cost CalculatorWealth Growth Visualizer1031 Exchange CalculatorRental Yield CalculatorCash-on-Cash Return CalculatorBRRRR Method CalculatorSection 8 Rent CalculatorRoommate Rent SplitterAirbnb Pricing OptimizerStatute of Limitations CalculatorSentence Reduction CalculatorSales Tax Nexus CheckerPatent Filing Fee CalculatorTrademark Class FinderWill Asset Distribution CalculatorWorkers' Compensation CalculatorStopping Distance CalculatorTrip Cost SplitterVehicle Weight Distribution CalculatorTrailer Tongue Weight CalculatorTire Tread Wear CalculatorEngine Compression Ratio CalculatorHeadlight Beam Distance CalculatorCat Litter Box CalculatorAquarium Heater Wattage CalculatorBird Cage Size CalculatorReptile Habitat UVB CalculatorPet Travel Crate Size FinderHorse Hay Calculator