Converting units by hand is one of those tasks that breeds mistakes: mixing up kilometers and nautical miles, megabytes and megabits, or remembering that 1 cubic meter is 1000 liters (true!) while forgetting that 1 kilo is 1000 grams.
The most common mistake: SI prefixes
The International System defines a kilobyte as 1000 bytes. The classic error is using 1024 instead (that's a KiB, kibibyte, used in older storage systems). Our storage converter lets you pick base 1000 or base 1024 so you don't have to remember which is which.
Tips for quick conversions
- Length: everything anchors to the meter. Kilometer = 1000 m, mile = 1609.34 m.
- Temperature: memorize the two formulas:
C = (F - 32) / 1.8,K = C + 273.15. - Speed: 1 km/h = 0.2778 m/s; converting knots to km/h is multiplying by 1.852.
- Volume: 1 liter = 0.001 m³. The only real "gotcha" is with imperial liquid units (gallon, pint).
How we handle precision at Toolbrik
All our converters work at the highest precision JavaScript allows (IEEE 754 double) and round to the displayed hundredth. If you need the exact result with many decimals, use the precision option available in each tool.
No data ever leaves your browser: every conversion is calculated locally.
Beyond the metric system
Not every conversion is about physical units. If you work in low-level programming or electronics, the number base converter switches between binary, octal, decimal and hexadecimal without a scientific calculator. And if you've ever had to typeset a book cover, an analog clock face or an exam question, the Roman numeral converter saves you from miscounting the Xs and Cs.
Conclusion
Mental shortcuts are fine, but for anything that matters — a recipe, a budget, a technical file — always use a tool. The unit converter covers over 100 units across 15 categories, free and with no sign-up.