Unit Converter

Convert between various units of length, weight, temperature, speed, area, and more

Unit Converter

Length Conversion

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Result

💼 Real-world Usage Scenarios

🌍 International Business

Convert length and weight units for accurate quotes in overseas transactions, translate product specifications to local units for better customer understanding, prevent unit mismatch errors in international shipping cost calculations

🏗️ Architecture & Interior Design

Convert overseas material specifications (feet, inches) to metric system, convert pyeong to square meters for foreign client communication, review HVAC system specifications with temperature unit conversion

🍽️ Cooking & Baking

Convert cups and ounces from international recipes to grams and milliliters, convert oven temperatures between Celsius and Fahrenheit for precise cooking, calculate ingredient costs with weight conversion

🚗 Automotive & Transportation

Convert fuel economy between liters/100km and MPG, convert speed limit signs (km/h ↔ mph), verify cargo weight by converting between tons and pounds

🎓 Professional Applications

🔬

Science & Research

Data Integration: Standardize measurements from multinational research teams

Paper Writing: Convert units to meet journal requirements (SI units)

Precise Temperature: Accurate scientific calculations between Kelvin, Celsius, Fahrenheit

💼

Business & Trade

Import/Export Documents: Auto-convert product specs to local unit systems

Pricing: Calculate accurate unit prices with weight and volume conversion

Logistics Optimization: Calculate container capacity in various units

🏃

Sports & Health

Exercise Records: Convert distance (km ↔ miles) and weight (kg ↔ pounds)

Nutrition Management: Standardize food nutrient units (g, mg, oz)

Body Composition: Track body measurements in multiple units

💡 Pro Tips

⭐ Use Favorites

Save frequently used conversion pairs (e.g., kg → lb, km → miles) to favorites for one-click quick conversion.

↔️ Bidirectional Conversion

Use the swap button to instantly reverse the conversion direction, convenient when you need reverse calculations.

📊 Quick Reference Table

View multiple values (1x, 5x, 10x, etc.) based on current conversion at a glance to understand approximate scale.

🎯 Precision Check

Results display up to 10 decimal places, making them reliable for scientific calculations and precise measurements.

🔧 Advanced Features

Temperature Conversion Algorithm

Temperature uses Celsius as base: Fahrenheit (F = C × 9/5 + 32), Kelvin (K = C + 273.15) formulas.

Example: 25°C → 77°F (25 × 9/5 + 32), 298.15K (25 + 273.15)

Base Unit Conversion

Each category converts to base unit first (length: meter, weight: kilogram) then to target unit.

Example: 1 mile → 1609.34m (base) → 1.60934km

Korean Traditional Unit

Supports 'pyeong' unit commonly used in Korean real estate for easy conversion with square meters.

Example: 30-pyeong apartment = 99.17m² (30 × 3.305785)

High Precision

Conversion factors are stored with 6+ decimal places, suitable for scientific purposes.

Example: 1 pound = 0.453592 kg (99.9999% accuracy)

Frequently Asked Questions

Why is temperature conversion different from other units?

Temperature is a difference-based unit, not a ratio. 0°C equals 32°F, requiring a formula (F = C × 9/5 + 32) instead of simple multiplication. Kelvin, an absolute temperature, is Celsius plus 273.15.

Why do conversion results show very long decimal places?

This is normal. We display up to 10 decimal places for precise calculations. In practice, use only the digits you need (e.g., 2 decimals for construction, 4+ for science).

What's the exact conversion value for pyeong to square meters?

1 pyeong = 3.305785 square meters. This is the official conversion factor used in Korean real estate, aligned with Ministry of Land, Infrastructure and Transport standards.

Where are favorites stored?

Favorites are stored in browser local storage, so they persist only on the same device and browser. You'll need to add them again on other devices, and they'll reset if browser data is cleared.

Does it support scientific notation (exponents)?

Yes, you can enter scientific notation like 1e6 (= 1,000,000) in the input field. Results display in regular decimal format, but very large values automatically convert to scientific notation.