Conversor de unidades

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A fórmula

Convert the source value to the category’s base unit, then divide by the target unit’s factor. Each category (length, data rate, energy, pressure, …) uses its own SI base so units never mix across dimensions.

target = value × (base_per_from ÷ base_per_to)

Exemplo resolvido

100 cm → metres
100 × 0.01 m/cm = 1 m
1 m → feet: 1 ÷ 0.3048 ≈ 3.28084 ft

Resultado: 100 cm = 1 m ≈ 3.28084 ft

How unit conversion works

Each category converts through one base unit. Switching category resets the unit lists so you never mix metres with litres or Mbit/s with MB.

Length, area, volume, mass

Length factors are exact international definitions (1 in = 0.0254 m, 1 ft = 0.3048 m). Area uses square metres. Volume uses litres (1 m³ = 1000 L) with US customary liquid measures. Mass uses kilograms (1 lb = 0.45359237 kg).

Digital storage vs internet speed

Digital storage uses bytes (kB/MB SI decimal; KiB/MiB IEC binary). Internet / data rate uses bits per second — ISP plans quote Mbit/s, while download managers often show MB/s (bytes). 8 Mbit/s ≈ 1 MB/s.

Energy, power, pressure, force

Energy converts through joules (including Wh, kWh, kcal, BTU). Power through watts (including mechanical horsepower). Pressure through pascals (bar, atm, psi, mmHg). Force through newtons (lbf, kgf).

Angle, frequency, speed, time

Angles convert through radians. Frequency through hertz (rpm = revolutions per minute). Travel speed through metres per second. Time through seconds.

Related tools

Temperature needs an offset, not a pure factor — use the temperature converter. Cooking volumes with ingredient densities use the cooking converter. Shape area from length × width uses the area calculator.

Factos interessantes

Bits vs bytes on your connection

A “100 Mbps” plan is megabits per second. Divide by 8 for a rough megabyte-per-second download rate (~12.5 MB/s) before protocol overhead.

SI vs binary prefixes

Hard-drive makers usually advertise GB as 10⁹ bytes, while operating systems often report GiB as 2³⁰ bytes — that gap is why free space looks smaller than the box promised.

Exact vs survey feet

Since 1959 the international foot is exactly 0.3048 m. Older US survey definitions can differ by tiny amounts in GIS work.

US liquid gallon

This converter uses the US liquid gallon (exactly 3.785411784 L), not the imperial gallon used in the UK.

Dimensional check

Writing units through a calculation catches errors: you cannot add metres to seconds without a conversion factor that makes sense.

Perguntas frequentes

Como converter Mbps em MB/s?

Escolha Velocidade da Internet, depois Mbit/s → MB/s. 8 bits = 1 byte: 80 Mbit/s ≈ 10 MB/s (sem overhead).

Como converter polegadas em centímetros?

Escolha Comprimento, depois in → cm. Multiplique por 2,54 (exato). Exemplo: 10 in × 2,54 = 25,4 cm.

Qual a diferença entre MB e MiB?

MB = 1.000.000 bytes (SI). MiB = 1.048.576 bytes (1024², IEC). Use Armazenamento digital.

Posso converter litros e galões?

Sim — categoria Volume. Medidas líquidas US junto com ml, L e m³.

Converte temperatura?

Não. Celsius ↔ Fahrenheit ↔ Kelvin precisa de offset. Use o conversor de temperatura.

Referências

SI units — National Institute of Standards and Technology (NIST) Official U.S. metrology guidance for SI units.
NIST SP 811 — Guide to the SI — National Institute of Standards and Technology Conversion factors and proper unit notation.
BIPM SI Brochure — Bureau International des Poids et Mesures International definitions of the metre and related units.
IEC 80000-13 — Binary prefixes — International Electrotechnical Commission KiB, MiB, GiB definitions (powers of 1024).

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