Best Unit Converters 2024

Complete comparison of the top unit converters for all measurement types. From basic metric conversions to complex scientific calculations.

673K+ Monthly Searches10+ Converters TestedAll Units Covered

🏆 Our Top Pick

Best Free Option

TinyHub Unit Converter

Clean, ad-free interface with instant conversions across 12+ categories. Covers all common units from metric to imperial, temperature scales, and more. No registration required.

Try TinyHub Unit Converter Free →

Most Popular Conversions

📏 Length

  • • Meters ↔ Feet
  • • Kilometers ↔ Miles
  • • Inches ↔ Centimeters

⚖️ Weight

  • • Kilograms ↔ Pounds
  • • Grams ↔ Ounces
  • • Tons ↔ Tonnes

🌡️ Temperature

  • • Celsius ↔ Fahrenheit
  • • Celsius ↔ Kelvin
  • • Fahrenheit ↔ Kelvin

🥤 Volume

  • • Liters ↔ Gallons
  • • Milliliters ↔ Ounces
  • • Cups ↔ Liters

Detailed Comparison Table

ConverterRatingBest ForKey FeaturesCategoriesPriceTry It
TinyHub Unit ConverterRECOMMENDED★ 4.9Quick conversions without ads or signup
LengthWeightTemperature
12+FreeTry Now →
Google Unit Converter★ 4.8Quick searches and voice queries
Basic unitsCurrencyVoice
8FreeExternal
ConvertUnits.com★ 4.6Obscure and historical unit conversions
5000+ unitsHistoricalScientific
75+FreeExternal
Unit Converter Pro★ 4.7Professional offline use
Offline modeCustom unitsFavorites
40+PaidExternal
Wolfram Alpha★ 4.7Scientific and engineering calculations
ScientificEngineeringMathematics
100+FreeExternal
Metric Conversions★ 4.5Educational use and reference
ChartsTablesFormulas
20FreeExternal

In-Depth Reviews

1. TinyHub Unit Converter

Quick conversions without ads or signup

★ 4.9
Our Choice

✓ Pros

  • • 100% Free
  • • No Ads
  • • All Units
  • • Instant Conversion
  • • Mobile Friendly

✗ Cons

  • • No offline mode
LengthWeightTemperatureVolumeAreaSpeedTimeEnergy
Unit Categories: 12+

2. Google Unit Converter

Quick searches and voice queries

★ 4.8

✓ Pros

  • • Built into search
  • • Voice input
  • • Currency rates
  • • No app needed

✗ Cons

  • • Limited units
  • • Internet required
Basic unitsCurrencyVoiceSearch integration
Unit Categories: 8

3. ConvertUnits.com

Obscure and historical unit conversions

★ 4.6

✓ Pros

  • • Extensive database
  • • Historical units
  • • Detailed explanations

✗ Cons

  • • Many ads
  • • Cluttered interface
5000+ unitsHistoricalScientificCooking
Unit Categories: 75+

4. Unit Converter Pro

Professional offline use

★ 4.7

✓ Pros

  • • Offline capable
  • • Custom units
  • • No ads (paid)

✗ Cons

  • • Paid app
  • • iOS only
Offline modeCustom unitsFavoritesHistory
Unit Categories: 40+

5. Wolfram Alpha

Scientific and engineering calculations

★ 4.7

✓ Pros

  • • Scientific accuracy
  • • Complex calculations
  • • Step-by-step

✗ Cons

  • • Subscription for full features
  • • Complex interface
ScientificEngineeringMathematicsPhysics
Unit Categories: 100+

6. Metric Conversions

Educational use and reference

★ 4.5

✓ Pros

  • • Simple interface
  • • Conversion tables
  • • Printable charts

✗ Cons

  • • Basic features only
  • • Desktop focused
ChartsTablesFormulasEducational
Unit Categories: 20

Quick Conversion Reference

Common Metric ↔ Imperial

1 meter=3.28084 feet
1 kilometer=0.621371 miles
1 kilogram=2.20462 pounds
1 liter=0.264172 gallons

Temperature Formulas

°F = (°C × 9/5) + 32
°C = (°F - 32) × 5/9
K = °C + 273.15

Unit Conversion Tips

📱 Mobile Tips

  • • Save converter as home screen app
  • • Use voice input for hands-free
  • • Download offline converter app

🎯 Accuracy Tips

  • • Round appropriately for context
  • • Check significant figures
  • • Verify with multiple tools

⚡ Speed Tips

  • • Bookmark favorite converter
  • • Learn common conversions
  • • Use keyboard shortcuts

Start Converting Units Now

No registration required. Convert between all measurement units instantly with our free tool.

Try TinyHub Unit Converter Free