81 Watt = 0.10862277 Horsepower

Surface tension

91 Erg per square centimeter

0.091 Newton per Meter

erg/cm² → N/m

Torque

8 Pound Force Foot

10.84656 Newton Meter

lbf·ft → N·m

Length

9 Inch

22.86 Centimeter

in → cm

Concentration

47 Parts per Billion

47 Microgram per liter

ppb → μg/L

Cooking

24 Shot

1,064.65 Milliliter

shot → ml

Area

40 Square Yard

33.44508 Square Meter

yd² → m²