The Universal Unit Converter transforms any value instantly — from length, area, volume, mass, to temperature — all in one place.
Convert cm to inches, liters to gallons, °C to °F, or even square meters to acres with one click. Every conversion updates live as you type.
⚙️ Supports both metric and imperial systems — including instant swap, smart auto-detection, and hundreds of built-in conversion formulas.
Universal Unit Converter
Universal Unit Converter — Supported Units & Instant Swap
Our Universal Unit Converter handles the major measurement categories in both metric and imperial. Convert between any two units instantly — and reverse direction with one click using Swap.
- Length: cm, m, km, inch (in), foot (ft), yard (yd), mil (thou) — perfect for design, architecture, and engineering.
- Area: mm², cm², m², km², in², ft², yd² — great for land, flooring, maps, and blueprints.
- Volume: ml, L, m³, in³, ft³, US cup, US pint (pt), US quart (qt), US gallon (gal) — kitchen, science, and construction uses.
- Mass/Weight: mg, g, kg, ounce (oz), pound (lb) — science, health, and trade measurements.
- Temperature: °C (Celsius), °F (Fahrenheit), K (Kelvin) — exact scientific conversions.
💡 Tip: You can combine freely inside each category (e.x., cm ⇄ inch, kg ⇄ lb, °C ⇄ °F). Conversions run instantly without reloading the page.
🟥 Unit Converter: Length Conversion Examples
Convert between length units such as centimeters (cm), meters (m), kilometers (km), inches (in), feet (ft), yards (yd), and mils (thou).
Use this length converter to switch instantly between metric and imperial measurements.
This section of the Universal Unit Converter is perfect for architects, designers, tailors, and engineers who need fast and accurate length conversions between metric and imperial systems.
🟨 Unit Converter: Area Conversion Examples
Easily convert between area units such as square millimeters (mm²), square centimeters (cm²),
square meters (m²), square kilometers (km²), square inches (in²), square feet (ft²), and square yards (yd²).
This area converter helps you handle land, flooring, and blueprint calculations accurately.
Use this section of the Universal Unit Converter for quick area conversions —
ideal for real estate, landscaping, architecture, and construction projects.
🟩 Unit Converter: Volume Conversion Examples
Convert between volume units like milliliters (ml), liters (L), cubic meters (m³),
cubic inches (in³), cubic feet (ft³), and US kitchen measures cup, pint (pt), quart (qt), gallon (gal).
Use this volume converter for liters to gallons, m³ to liters, and more.
This part of the Universal Unit Converter is ideal for cooking, lab work, and construction — offering fast, reliable volume conversions across metric and US customary units.
🟥 Unit Converter: Mass Conversion Examples
Convert between mass and weight units instantly — including
milligrams (mg), grams (g), kilograms (kg), ounces (oz), and pounds (lb).
This mass converter helps you move smoothly between the metric and imperial systems for cooking, science, or fitness tracking.
This mass conversion tool ensures precise results for any application —
whether you’re converting ounces to grams for a recipe, or kilograms to pounds for fitness tracking.
🌡️ Unit Converter: Temperature Conversion Examples
Instantly convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) with this
temperature converter. Perfect for science, engineering, or everyday weather use — accurate, fast, and easy to understand.
°F = (°C × 9/5) + 32 | °C = (°F − 32) × 5/9 | K = °C + 273.15
The temperature conversion tool supports all directions —
from °C to °F, °F to °C, and °C to K — ideal for weather forecasting, academic work, and lab experiments.
❓ FAQ – Universal Unit Conversion Guide
What is a unit converter and how does it work?
A unit converter is a digital tool that instantly changes values between different measurement systems —
for example, converting cm to inches, kg to pounds, or °C to °F. It uses fixed mathematical
relationships between units (like 1 inch = 2.54 cm) to deliver precise results.
What are the main types of unit conversions?
The main conversion categories include:
Length (cm, inch, ft, yard), Area (m², ft², acre),
Volume (liter, gallon, cubic feet),
Mass (gram, kilogram, pound, ounce),
and Temperature (Celsius, Fahrenheit, Kelvin).
The Universal Unit Converter supports all these modes.
What’s the difference between metric and imperial units?
The metric system (cm, m, kg, L, °C) is decimal-based and used worldwide,
while the imperial system (inch, ft, lb, °F) is primarily used in the U.S. and U.K.
This converter lets you switch instantly between both systems with accurate equivalences.
How can I convert temperature manually?
Use these standard formulas:
°F = (°C × 9/5) + 32 | °C = (°F − 32) × 5/9 | K = °C + 273.15.
The calculator automatically applies these conversions for instant accuracy.
Can I convert between mixed units (like liters to cubic feet)?
Yes — the Universal Unit Converter handles cross-category conversions such as
liters to cubic feet or ounces to milliliters automatically.
Just choose the appropriate mode and type your value.
Is this tool free to use?
Yes ✅ this unit converter is completely free to use —
you can calculate, swap, and copy results instantly without registration or hidden fees.
🔚 Conclusion – Convert Anything, Instantly
The Universal Unit Converter makes complex calculations simple — covering
length, area, volume, mass, and temperature in one place.
Whether you’re a student, engineer, or designer, this free online tool helps you
switch between metric and imperial units instantly and accurately.
💡 Explore More Tools
Try our other free converters for faster calculations:
CM to Inches Converter,
MM to Inches Converter,
and
Sector Area Calculator
.
📘 For official reference values and unit standards, visit
NIST – Weights and Measures Division.
❤️ Crafted with care for our amazing visitors — we truly love you!
Made with 💖 by the PixelsCalculator team to make your conversions easier, faster, and smarter.