Free Unit Converters

Convert between 160+ world currencies using live mid-market exchange rates. Pick any two currencies, swap them with one click, and save conversions to compare them side by side.

Convert centimeters to inches and back. One inch is exactly 2.54 cm, so the conversion is precise — type in either box for an instant result.

Convert feet to inches for expressing heights as a single inch value, lumber and construction dimensions, furniture assembly, and DIY projects requiring precise measurements.

Convert feet to meters for heights of people and buildings, room heights, and when you need to translate US or UK measurements into the metric system.

Convert inches to centimeters for screen and TV sizes, clothing and body measurements, paper dimensions, and practical DIY home-improvement tasks.

Convert kilometers to miles for running races and cycling distances (5K, 10K, marathons), long-distance road trips, and translating car odometer readings between metric and imperial.

Convert meters to feet and back. Type in either box for an instant result, and use the table for common heights and distances.

Convert meters to yards for swimming pool lengths and diving distances, athletics track dimensions, and translating metric sports measurements into imperial units for US audiences.

Convert miles to feet for hiking and walking distances, elevation gain calculations, aviation altitudes, and counting track laps in athletic training.

Convert miles to kilometers and back. Type in either box for an instant result, and check the table for common running and driving distances.

Convert millimeters to inches and back. One inch is exactly 25.4 mm, so the result is precise — type in either box for an instant answer.

Convert nautical miles to kilometers for marine and air navigation, ship and aircraft distances, and understanding maritime speed (knots), a unit tied to nautical miles.

Convert yards to meters for American football fields and field sports, fabric and textile yardage, athletics and track events, and outdoor construction projects.

Convert grams to ounces and back — handy for cooking, baking, and parcels. Type in either box for an instant result.

When food packaging or product specifications list weight only in grams, converting to pounds helps you understand quantity at a glance. One gram equals 0.0022 pounds—a small multiplier that's essential for comparing nutrition labels, ordering bulk ingredients, or tracking parcel weight.

Convert kilograms to pounds and back. Type in either box for an instant result, and use the table for common values at a glance.

Kilograms and grams are metric units separated by a factor of exactly 1000—making this the most straightforward mass conversion. Whether you're following a recipe in a nutrition database, weighing lab samples, or reading international food packaging, converting kilograms to grams is fundamental to metric cooking and science.

In the United Kingdom and Ireland, body weight is traditionally expressed in stones and pounds rather than kilograms alone. Converting kilograms to stones is essential for anyone moving between countries or comparing health metrics with British and Irish populations. One kilogram equals 0.157 stones.

Baking and cooking recipes often demand precision, especially when following instructions written for different measurement systems. One ounce equals 28.35 grams—a critical conversion for anyone scaling recipes or verifying ingredient weights on food packages.

Converting pounds to kilograms is essential whether you're tracking your fitness progress, checking gym plate weights, or understanding international shipping restrictions. One pound equals 0.4536 kilograms—a conversion that bridges everyday US measurements with the metric standard.

Convert body weight between stones and kilograms. One stone is 14 pounds, or about 6.35 kg. Type in either box for an instant result.

Convert temperatures between Celsius and Fahrenheit. Type in either box for an instant result, and check the table for everyday reference points.

The Kelvin scale is the SI standard for absolute temperature in science and engineering. Convert any Celsius value to Kelvin instantly—whether you're working in a lab, studying thermodynamics, or analyzing astronomical data.

Convert Fahrenheit to Celsius with this simple, accurate converter. Whether you're checking the weather, adjusting an oven, or understanding a fever, our tool gives you the exact Celsius equivalent in seconds.

Converting between the everyday Fahrenheit scale and the absolute Kelvin scale requires two steps, but our converter does it instantly. Essential when scientific research or international collaboration requires translating US temperatures into SI units.

Need to translate absolute temperature readings from Kelvin into familiar Celsius values? This converter handles the conversion instantly—perfect for astronomy, physics research, and understanding scientific data.

Convert cubic meters (m³) to liters (L) — for water tanks, construction and concrete volumes, and container capacity.

A US legal cup is exactly 236.5882365 milliliters—crucial when translating American recipes for cooks using metric measuring jugs and scales worldwide.

One US fluid ounce is 29.5735296 milliliters—essential for understanding bottle sizes, dosing cosmetics and perfume, measuring drinks, and following recipes with precision.

The US gallon is 3.785411784 liters. This converter is essential for fuel economy, aquarium sizing, and understanding water consumption across metric and imperial systems.

Convert liters to US gallons and back. Type in either box for an instant result. This tool uses US gallons — imperial gallons are larger.

Converting 236.5882365 milliliters back to one US cup—essential for bakers and cooks adapting metric recipes or measurement jugs to traditional American measuring cups.

A US liquid pint is 0.473176473 liters—vital for beer consumption, milk purchases, cream in recipes, and understanding portion sizes across continents.

A US quart is 0.946352946 liters—fundamental for sizing cookware, measuring motor oil, buying milk, and scaling recipes that span imperial and metric kitchens.

One US tablespoon is 14.78676478 milliliters—critical for drizzling oils, measuring condiments, and scaling small-batch recipes across imperial and metric kitchens.

A US teaspoon is 4.92892159 milliliters—essential for measuring spices, vanilla extract, baking soda, and accurately dosing liquid medications worldwide.

Convert food calories (kcal) to kilojoules (kJ) — useful when a recipe or US/UK label lists Calories but you need the kilojoules shown on many international labels.

Convert kilojoules (kJ) to food calories (kcal) — handy for reading nutrition labels in countries that print energy in kilojoules, such as Australia, New Zealand, and across the EU.

Convert bar to pounds per square inch (psi) — useful for tyre and tube pressures, diving gear, and any equipment rated in bar when you need the US/UK unit.

Convert kilopascals (kPa) to pounds per square inch (psi). Many cars show tyre pressure in kPa, while gauges and US specs use psi.

Convert megapascals (MPa) to pounds per square inch (psi) — the high-pressure unit used for material strength, hydraulics, and equipment ratings.

Convert pounds per square inch (psi) to bar — the pressure units you meet on tyres, air compressors, and hydraulic equipment when moving between US and metric specs.

Convert kilometers per hour (km/h) to miles per hour (mph) instantly. Essential for drivers crossing metric and imperial countries—whether you're reading a European speedometer, checking distance/speed limits abroad, or planning an international road trip.

Convert knots (nautical miles per hour) to miles per hour (mph) with precision. Knots are the standard speed measurement in maritime, aviation, and meteorology—this tool bridges the gap when you need to express that speed in familiar land-based mph.

Convert meters per second (m/s) to kilometers per hour (km/h) instantly. This is the go-to conversion for physics problems, scientific measurements, wind speed analysis, and sports performance tracking where velocities are expressed in SI units.

Convert miles per hour (mph) to meters per second (m/s) for physics, engineering, and scientific work. If you have a speed in US or UK units (mph) but need SI-standard meters per second, this converter delivers the instant result.

Convert speed between miles per hour and kilometers per hour. Type in either box for an instant result, and scan the table for common speed limits.

An acre is a traditional US unit of land measurement equal to 43,560 square feet. This converter helps you translate acreage into total square footage for real-estate valuations, property surveys, and lot size comparisons.

A hectare is the metric standard for land area, widely used by farmers, environmental agencies, and governments worldwide. This converter bridges metric hectares and US/UK acres, essential when comparing international property or agricultural statistics.

Square feet measure floor area in the US, while square meters are the global metric standard. This converter is indispensable for real-estate agents, contractors, and interior designers comparing property sizes across borders or adapting international design plans.

Square kilometers and square miles both measure large geographic regions—cities, lakes, forests, and countries. This converter helps you compare land masses and understand regional statistics when crossing metric-versus-customary borders in cartography, climatology, and geopolitical analysis.

Convert area between square meters and square feet — useful for floor plans, rooms, and real estate. Type in either box for an instant result.