The 10 Categories This Converter Handles
ToolLance's Unit Converter covers length, weight and mass, temperature, speed, area, volume, time, data storage, pressure, and energy — over 80 units in total, converted instantly as you type, with a reference table showing every equivalent unit at once so you don't have to keep changing dropdowns.
Common Conversions People Search For
| Conversion | Formula | Example |
|---|---|---|
| kg → lbs | × 2.20462 | 70 kg = 154.32 lbs |
| lbs → kg | × 0.453592 | 150 lbs = 68.04 kg |
| km → miles | × 0.621371 | 10 km = 6.21 miles |
| miles → km | × 1.60934 | 10 miles = 16.09 km |
| m → feet | × 3.28084 | 5 m = 16.40 ft |
| cm → inches | × 0.393701 | 30 cm = 11.81 in |
| mph → km/h | × 1.60934 | 60 mph = 96.56 km/h |
| liters → gallons (US) | × 0.264172 | 20 L = 5.28 gal |
For a specific temperature lookup — like Celsius to Fahrenheit or Fahrenheit to Celsius — those dedicated guides include full reference charts and worked examples for common values like body temperature and boiling point.
Why Temperature Conversion Works Differently
Most unit conversions are a single multiplication — multiply by a fixed factor and you're done. Temperature is the exception: Celsius, Fahrenheit, Kelvin, and Rankine all use different zero points, so converting between them requires an offset formula, not just a multiplier. °F = (°C × 9/5) + 32 is the classic example — the ×9/5 scales the degree size, and the +32 shifts the zero point. The converter handles all four scales with the full formula, not a linear approximation.
Metric vs Imperial — Quick Reference
- Length: 1 meter ≈ 3.28 feet · 1 km ≈ 0.62 miles · 1 inch = 2.54 cm
- Weight: 1 kg ≈ 2.20 lbs · 1 stone = 14 lbs = 6.35 kg
- Volume: 1 liter ≈ 0.26 US gallons · 1 US gallon ≈ 3.79 liters
- Speed: 1 km/h ≈ 0.62 mph · 1 knot ≈ 1.15 mph
KB vs KiB — Why Data Storage Conversion Confuses People
A drive labeled "1 TB" almost always shows less than 1,000 GB of usable space in your operating system. That's not a scam — it's two different definitions of the same prefix. Storage manufacturers use the decimal system, where 1 KB = 1,000 bytes. Operating systems use the binary system, where 1 KiB (kibibyte) = 1,024 bytes. The gap compounds at larger sizes: by the terabyte level, the decimal and binary values differ by roughly 10%. The converter includes both KB/MB/GB/TB and KiB/MiB/GiB so you can see exactly which one you're looking at.
Frequently Asked Questions
What unit categories does this converter support?
Length, weight/mass, temperature, speed, area, volume, time, data storage, pressure, and energy — over 80 units total.
How do I convert kg to lbs?
Multiply kilograms by 2.20462. For example, 70 kg = 154.324 lbs.
How many feet are in a meter?
1 meter = 3.28084 feet. For example, 5 meters = 16.4042 feet.
What is the difference between KB and KiB?
KB is 1,000 bytes (decimal, used by manufacturers). KiB is 1,024 bytes (binary, used by operating systems) — the reason a "1TB" drive shows less than 1,000 GB in Windows.
Is this converter accurate enough for engineering or scientific work?
Conversions use exact or widely-accepted factors accurate to at least 6 significant figures, with correct offset formulas for temperature. For high-precision engineering, verify against your field's authoritative standard.