Wartsila ?31DF Series, Product Manual, Page: 213 / 216

21. ANNEX
21.1 Unit conversion tables
The tables below will help you to convert units used in this product guide to other units. Where
the conversion factor is not accurate a suitable number of decimals have been used.
Mass conversion factors Length conversion factors
Multiply by To Convert from Multiply by To Convert from
2.205 lb kg 0.0394 in mm
35.274 oz kg 0.00328 ft mm
Volume conversion factors Pressure conversion factors
Multiply by To Convert from Multiply by To Convert from
61023.744 in 3 m 3 0.145 psi (lbf/in 2 ) kPa
35.315 ft 3 m 3 20.885 lbf/ft 2 kPa
219.969 Imperial gallon m 3 4.015 inch H
2
O kPa
264.172 US gallon m 3 0.335 foot H
2
O kPa
1000 l (litre) m 3 101.972 mm H
2
O kPa
0.01 bar kPa
Moment of inertia and torque conversion factors Power conversion
Multiply by To Convert from Multiply by To Convert from
23.730 lbft 2 kgm 2 1.360 hp (metric) kW
737.562 lbf ft kNm 1.341 US hp kW
Flow conversion factors Fuel consumption conversion factors
Multiply by To Convert from Multiply by To Convert from
4.403 US gallon/min m 3 /h (liquid) 0.736 g/hph g/kWh
0.586 ft 3 /min m 3 /h (gas) 0.00162 lb/hph g/kWh
Density conversion factors Temperature conversion factors
Multiply by To Convert from Multiply by To Convert from
0.00834 lb/US gallon kg/m
3
F = 9/5 *C + 32 F °C
0.01002 lb/Imperial gallon kg/m
3
K = C + 273.15 K °C
0.0624 lb/ft
3
kg/m
3
21.1.1 Prefix
Table 21-1 The most common prefix multipliers
Factor Symbol Name Factor Symbol Name Factor Symbol Name
10 -9 n nano 10 3 k kilo 10 12 T tera
10 -3 m milli 10 9 G giga
10 -6
μ
micro 10 6 M mega
DBAE248994 21-1
21. ANNEX Wärtsilä 31DF Product Guide