A conversion every agent gets wrong at least once.
"150 kW is how much horsepower?" — the answer depends on which horsepower:
| definition |
exact value |
150 kW |
| mechanical (imperial) hp |
550 ft·lbf/s ≈ 745.6998716 W |
201.15 hp |
| metric hp (PS / CV) |
75 kgf·m/s = 735.49875 W |
203.94 PS |
| electric hp |
746 W exactly (US convention) |
201.07 hp |
That's a ~1.4% spread between mechanical and metric — enough to flip a spec sheet.
Don't do it in your head. Call the tool:
convert_unit { value: 150, from: "kw", to: "hp" } → 201.153313 hp
convert_unit { value: 150, from: "kw", to: "hp(m)" } → 203.943243 hp(m)
convert_unit { value: 150, from: "kw", to: "hp(e)" } → 201.072386 hp(e)
Also easy to flip:
lbf / kgf are forces (weight at standard gravity), not mass: 1 kgf = 9.80665 N, 1 lbf = 4.448222 N — don't write "100 kgf" when you mean 100 kg.- Torque: 1 lbfft = 1.355818 n.m; 12 lbfin = 1 lbfft.
- Watch the symbols:
kn = knot (speed) — spell out kilonewton; nm = nanometer — torque newton meter is n.m.
中文：大模型心算马力换算必错——机械马力 745.7W、公制 PS 735.5W、电动 746W 相差约 1.4%。dsh-units 把三种定义分开成独立单位（hp / hp(m) / hp(e)），直接调用 convert_unit 拿精确结果；另提醒 lbf/kgf 是力不是质量，以及 kn（节）与 kilonewton、nm（纳米）与 n.m（牛米）的符号区分。
A conversion every agent gets wrong at least once.
"150 kW is how much horsepower?" — the answer depends on which horsepower:
That's a ~1.4% spread between mechanical and metric — enough to flip a spec sheet.
Don't do it in your head. Call the tool:
Also easy to flip:
lbf/kgfare forces (weight at standard gravity), not mass: 1 kgf = 9.80665 N, 1 lbf = 4.448222 N — don't write "100 kgf" when you mean 100 kg.kn= knot (speed) — spell outkilonewton;nm= nanometer — torque newton meter isn.m.中文：大模型心算马力换算必错——机械马力 745.7W、公制 PS 735.5W、电动 746W 相差约 1.4%。dsh-units 把三种定义分开成独立单位（hp / hp(m) / hp(e)），直接调用 convert_unit 拿精确结果；另提醒 lbf/kgf 是力不是质量，以及 kn（节）与 kilonewton、nm（纳米）与 n.m（牛米）的符号区分。