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 OptionTinyHub 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
| Converter | Rating | Best For | Key Features | Categories | Price | Try It |
|---|---|---|---|---|---|---|
| TinyHub Unit ConverterRECOMMENDED | ★ 4.9 | Quick conversions without ads or signup | LengthWeightTemperature | 12+ | Free | Try Now → |
| Google Unit Converter | ★ 4.8 | Quick searches and voice queries | Basic unitsCurrencyVoice | 8 | Free | External |
| ConvertUnits.com | ★ 4.6 | Obscure and historical unit conversions | 5000+ unitsHistoricalScientific | 75+ | Free | External |
| Unit Converter Pro | ★ 4.7 | Professional offline use | Offline modeCustom unitsFavorites | 40+ | Paid | External |
| Wolfram Alpha | ★ 4.7 | Scientific and engineering calculations | ScientificEngineeringMathematics | 100+ | Free | External |
| Metric Conversions | ★ 4.5 | Educational use and reference | ChartsTablesFormulas | 20 | Free | External |
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