单位族 | UnitCloud

单位族

UnitCloud 是面向日常、工程、IT、能源、交通和设计的本地测量实验室。

长度

Inch, foot and mile use fixed factors. Errors usually come from early rounding or from mixing land miles and nautical miles.

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基准单位: m
目标值: 11
Unit: nm, µm, mm, cm, m, km

面积

Area scales quadratically. A length factor is not automatically an area factor.

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基准单位: m²
目标值: 8
Unit: mm², cm², m², km², ha, acre

体积

Volume is robust for liquids. For dry ingredients it does not replace weighing because density and packing vary.

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基准单位: l
目标值: 11
Unit: ml, cl, dl, l, m³, tsp

质量

Pound is not always the same local unit. UnitCloud uses international avoirdupois values.

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基准单位: g
目标值: 8
Unit: µg, mg, g, kg, t, oz

温度

Temperature uses an offset. Fahrenheit and Kelvin are not pure factor units.

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基准单位: °C
目标值: 4
Unit: °C, °F, K, °R

数据

KB, MB and GB are decimal. KiB, MiB and GiB are binary. This distinction explains many apparent storage gaps.

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基准单位: Byte
目标值: 10
Unit: bit, B, KB, MB, GB, TB

速度

Knots are nautical miles per hour. mph and knots are not interchangeable imperial speeds.

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基准单位: m/s
目标值: 5
Unit: m/s, km/h, mph, kn, ft/s

能量

Food calories are kilocalories. Utility bills use kilowatt-hours. Both are energy units, but in different contexts.

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基准单位: J
目标值: 8
Unit: J, kJ, Wh, kWh, cal, kcal

功率

PS and hp are not identical. Vehicle data often uses metric horsepower, while US/UK contexts often use mechanical horsepower.

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基准单位: W
目标值: 6
Unit: W, kW, MW, PS, hp, BTU/h

压力

bar, psi and atm appear in different fields. Tyre, weather and lab values need context.

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基准单位: Pa
目标值: 8
Unit: Pa, kPa, MPa, bar, mbar, psi

密度

Density depends on temperature, material state and measurement conditions. Unit conversion does not replace material data.

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基准单位: kg/m³
目标值: 4
Unit: kg/m³, g/cm³, g/l, lb/ft³

时间

Calendar months and years vary. This family uses fixed seconds for technical durations, not legal deadlines.

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基准单位: s
目标值: 7
Unit: ms, s, min, h, d, week

角度

Degrees and radians are often mixed in software, geometry and trigonometry. Formulas usually expect a specific angle unit.

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基准单位: rad
目标值: 6
Unit: rad, °, gon, turn, ′, ″

力

Force and mass are not the same. Kilogram is mass, newton is force.

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基准单位: N
目标值: 5
Unit: N, kN, MN, lbf, kgf

扭矩

Torque is not power. Newton metre and hp/kW answer different questions.

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基准单位: N·m
目标值: 4
Unit: N·m, lb·ft, lb·in, kgf·m

油耗

mpg and l/100 km move in opposite directions. Higher mpg means lower consumption; higher l/100 km means higher consumption.

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基准单位: l/100 km
目标值: 4
Unit: l/100 km, km/l, mpg US, mpg imp

排版

px depends on output context. UnitCloud uses the CSS reference of 96 px per inch.

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基准单位: pt
目标值: 6
Unit: pt, pc, in, mm, cm, px

图像分辨率

Pixel count and print density are different. Print sizes also need width, height and ppi.

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基准单位: px
目标值: 4
Unit: px, kpx, MP, GP

频率

rpm and bpm are events per minute. Hz is events per second.

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基准单位: Hz
目标值: 6
Unit: Hz, kHz, MHz, GHz, rpm, bpm