Learn unit conversions through fun games! Practice length, weight, volume, temperature, area, and speed conversions.
100 base points per correct answer plus time bonus (5 points per remaining second). Every 3 consecutive correct answers earn an additional 50 point bonus.
When you answer 3+ questions correctly in a row. One wrong answer resets the streak.
Easy: 15s, Normal: 10s, Hard: 7s per question. Number complexity also increases.
Highest score per category and difficulty is saved in your browser.
Unanswered questions are counted as wrong and reset the streak. The correct answer is shown.
Yes, fully optimized for mobile devices.
Units are essential foundational knowledge in every field — science, engineering, cooking, sports, and everyday life. The ability to accurately understand and convert units is useful across daily life: understanding distances and temperatures while traveling abroad, converting cooking recipes, and communicating in international business. In a global environment, understanding both the metric and imperial systems is especially important.
The International System of Units (SI, Système International) is the standard unit system used in science and industry worldwide. It consists of 7 base units: length (meter, m), mass (kilogram, kg), time (second, s), temperature (kelvin, K), and others. Understanding the prefix system (milli-, centi-, kilo-, mega-, etc.) makes unit conversion much easier. For example, kilo- always means 1,000, so 1 kilometer = 1,000 meters and 1 kilogram = 1,000 grams.
There are fun ways to remember units. One inch is derived from the length of the first joint of the thumb, and one foot was based on the size of an adult foot. To convert Fahrenheit (°F) to Celsius (°C), remember the rule: "subtract 32 and divide by 1.8". The mile originated from the distance a Roman soldier walked in a thousand paces (mille passus). Understanding this historical background makes the meaning of units more vivid and memorable.