Section N Technical Guide

Technical Guidance Reference: SI Unit Conversion List

■ Basic SI Units ● Quantity as a reference of SI Quantity

● Basic unit provided with unique name and symbol (extracted) Quantity Material Symbol Frequency Hertz Hz Force Newton N Pressure and stress Pascal Pa Energy, work, and heat quantity Joule J Power and efficiency Watt W Voltage Bolt V Electrical resistance Ohm Ω

Material

Symbol

Length

Metre

m

Mass Time

Kilogram Second Ampere

kg

s

Current

A K

Temperature

Kelvin

Quantity of substance Luminous intensity

Mol

mol

Candela

cd

■ SI Prefixes ● Prefix showing integral powers of 10 combined with SI units Coefficient Material Symbol Coefficient Material Symbol Coefficient Material Symbol 10 24 Yotta Y 10 3 Kilo k 10 -9 Nano n 10 21 Zeta Z 10 2 Hecto h 10 -12 Pico p 10 18 Exa E 10 1 Deca da 10 -15 Femto f 10 15 Peta P 10 -1 Deci d 10 -18 Atto a 10 12 Tera T 10 -2 Centi c 10 -21 Zepto z 10 9 Giga G 10 -3 Milli m 10 -24 Yocto y 10 6 Mega M 10 -6 Micro μ

N

■ Principal SI Unit Conversion List (

portions are SI units)

● Force

● Stress

N

kgf

Pa(N/m 2 )

MPa(N/mm 2 )

kgf/mm 2

kgf/cm 2

kgf/m 2

1.01972 × 10 -1

1 × 10 -6

1.01972 × 10 -7 1.01972 × 10 -1

1.01972 × 10 -5 1.01972 × 10

1.01972 × 10 -1 1.01972 × 10 5

1

1

1 × 10 6

9.80665

1

1

9.80665 × 10 6 9.80665 × 10 4

1 × 10 2

1 × 10 6 1 × 10 4

9.80665

1

9.80665 × 10 -2 9.80665 × 10 -6

1 × 10 -2 1 × 10 -6

1

1 × 10 - 4

9.80665

1 1Pa = 1N/m 2 , 1MPa = 1N/mm 2

● Pressure

Pa(N/m 2 )

kPa

MPa

GPa

bar

kgf/cm 2

mmHg or Torr 7.50062 × 10 -3

1 × 10 -3

1 × 10 -6 1 × 10 -3

1 × 10 -9 1 × 10 -6 1 × 10 -3

1 × 10 -5 1 × 10 -2 1 × 10 1 × 10 4

1.01972 × 10 -5 1.01972 × 10 -2 1.01972 × 10 1.01972 × 10 4

1

1 × 10 3 1 × 10 6 1 × 10 9 1 × 10 5

1

7.50062

1 × 10 3 1 × 10 6 1 × 10 2

7.50062 × 10 3 7.50062 × 10 6 7.50062 × 10 2 7.35559 × 10 2

1

1 × 10 3 1 × 10 -1

1

1 × 10 -4

1

1.01972

9.80665 × 10 4 1.33322 × 10 2

9.80665 × 10 1.33322 × 10 -1

9.80665 × 10 -2 1.33322 × 10 -4

9.80665 × 10 -5 1.33322 × 10 -7

9.80665 × 10 -1 1.33322 × 10 -3

1

1.35951 × 10 -3

1 1Pa = 1N/m 2

● Work / Energy / Heat Quantity J kW·h

kgf·m

kcal

2.77778 × 10 -7

1.01972 × 10 -1 3.67098 × 10 5

2.38889 × 10 -4 8.60000 × 10 2 2.34270 × 10 -3

1

3.60000 × 10 6

1

2.72407 × 10 -6 1.16279 × 10 -3

9.80665

1

4.18605 × 10 3

4.26858 × 10 2

1 1J=1W/s,1J=1N/m

● Power (efficiency and motive energy) / Thermal flow W kgf·m/s PS

kcal/h

1.01972 × 10 -1 1.01972 × 10 2

1.35962 × 10 -3

8.60000 × 10 -1 8.60000 × 10 2

1

1 × 10 3

1.35962

1.33333 × 10 -2

9.80665

1

8.43371

7.355 × 10 2

7.5 × 10

6.32529 × 10 2

1

1.18572 × 10 -1

1.58095 × 10 -3

1.16279

1 1W = 1J/s, PS: Horsepower

● Specific Heat

● Thermal Conductivity

● Spindle Speed

1kcal (kg/°C) cal/ (g/°C)

J/(kg·K)

W/(m/K)

kcal/(h·m·°C)

min -1

rpm

2.38889 × 10 -4

8.60000 × 10 -1

1

1 1min -1 =1rpm

1

1

N69

4.18605 × 10 3

1

1.16279

1

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