Conversion Charts & Formulas

LENGTH — Basic unit is meter (m)

Metric
Unit
Meters
Inches
Feet
Yards
Miles
Millimeter (mm)
Centimeter (cm)
Decimeter (dm)
Meter (m)
Decameter (dkm)
Hectometer (hm)
Kilometer (km)
001
.01
.1
1
10
100
1000

.3937
3.937
39.37
393.7
3937


.3281
3.281
32.81
328.1
3281


.1094
1.094
10.94
109.4
1094






.6214
To Convert
Inch to mm
Multiply by 25.4
mm to Inch
Multiply by .03937
Feet to Inch
Multiply by .3048
Meters to Feet
Multiply by 3.281
Yards to Meters
Multiply by .9144
Meters to Yards
Multiply By 1.094
Miles to Km
Multiply by 1.609
Km to Miles
Multiply by .6214

VOLUME — Basic unit is stere (s) which is 1 cubic meter

Metric
Unit
Steres
Cubic
Inch
Cubic
Feet
Cubic
Yards
Cu. Millimeter (cu mm).
Cu. Centimeter (cu cm)
Cu. Decimeter (cu dm)
Desistere (ds)
Stere/Cu Meter (s/cu m)
Decastere (dks)
.000000001
.000001
.001
.1
1
10

.3937
3.937
39.37
393.7
3937


.3281
3.281
32.81
328.1


.1094
1.094
10.94
109.4
To Convert
Cu.In. to Cu.mm
multiply by 1639
Cu.mm to Cu.In
multiply by.000061
Cu.In. to Cu.cm
multiply by 16.39
Cu.cm to Cu.In.
multiply by .06102
Cu.Ft. to Cu.m
multiply by .0283
Cu.m to Cu.Ft.
multiply by 35.31
Cu.Yds. to Cu.m
multiply by .7646
Cu.m to Cu.yds.
multiply by 1.308


AREA
— Basic unit is Centare (CA) which is 1 square meter

Metric
Unit
Centares
Square Inches
Square Feet
Square
Yards
Acres
Sq. Millimeter (sq.cm.)
Sq. Centimeter (sq.cm.)
Sq. Decemeter (sq.dm.)
Centare/Sq.meter
(ca/sq m)
Area (a)
Hectare (ha)
Sq. Kilometer (sq.km)

.00001
.0001
.01
1

100
10,000
1,000,000


.1550
15.50
1550





.1076
10.76

1076




1.196


119.6







2.471
247.1
To Convert
Sq. in. to sq. cm
multiply by 6.452
Sq. cm to sq. in.
multiply by .1550
Sq. Ft. to sq. m.
multiply by .0929
Sq. m. to sq. ft.
multiply by 10.76
Sq. yds to sq. m.
multiply by.8361
Sq. m. to sq. yds.
multiply by 1.196
Acres to Hectares
multiply by .4047
Hectares to Acres
multiply by 2.471
Acres to sq. km.
multiply by .004047
Sq. km to Acres
multiply by 247.1
Sq. miles to sq. km
multiply by 2.590
Sq. km to sq. miles
multiply by .3861


WEIGHT
— Basic unit is gram (g)

Metric
Unit
Grams
Grains
Ounces
Pounds
Milligram (mg)
Centigram (cg)
Decigram (dg)
Gram
Decagram (dkg)
Hectogram (hg)
Kilogram (kg)
Quintal (q)
Metric Ton (MT)
.001
.01
.1
1
10
100
1000
100,000
1,000,000
.01543
.1543
1.543
15.43
154.3
1543





.03527
.3527
3.527
35.27
3527





.22046
2.2046
220.46
2204.6
To Convert

G to CG
multiply by 6.48
CG to G
multiply by .1543
Ounces to G
multiply by–31.103

G to Ounces
multiply by .03527
Pounds to KG
multiply by .4536
KG to Pounds
multiply by 2.2046
Tons (2000#) to Metric Tons - multiply by .9078
Metric Tons to Tons (2000#) - multiply by 1.1023

Specific Gravity of Liquids

LIQUID
TEMP °F
SPECIFIC
GRAVITY
Water (1 cu. ft. weighs 62.41 lb)
50
1.00
Brine (Sodium Chloride 25%)
32
1.20
Pennsylvania Crude Oil
80
0.85
Fuel Oil No. 1 and 2
85
0.95
Gasoline
80
0.74
Kerosene
85
0.82
Lubricating Oil SAE 10-20-30
115
0.94
LIQUID
TEMP °F
SPECIFIC
GRAVITY
30% Acetic Acid
68
1.04
50% Acetic Acid
68
1.05
20% Chromic Acid
68
1.16
20% Hydrogen Peroxide
68
1.07
25% Methyl Alcohol
68
0.96
10% Nitric Acid
68
1.05
20% Nitric Acid
68
1.11

LIQUID
TEMP °F
SPECIFIC
GRAVITY
20% Phosphoric Acid
68
1.11
20% Sodium Hydroxide
68
1.21
50% Sodium Hydroxide
68
1.52
20% Sulphuric Acid
68
1.14
50% Sulphuric Acid
68
1.40
98% Sulphuric Acid
68
1.83

Conversion Constants

To Change
To
Multiply By
Inches ........................
Inches ........................
Feet............................
Feet............................
Yards .........................
Square inches .............
Square feet..................
Square feet..................
Square yards...............
Cubic inches ...............
Cubic feet....................
Cubic feet....................
Cubic yards.................
Cubic inches ...............
Cubic feet....................
Gallons.......................
Gallons.......................
Gallons.......................
Pounds of water ..........
Ounces.......................
Pounds.......................
Inches of water ............
Feet ...............................
Millimeters......................
Inches............................
Yards.............................
Feet ...............................
Square feet .....................
Square inches.................
Square yards ..................
Square feet .....................
Cubic feet .......................
Cubic inches...................
Cubic yards ....................
Cubic feet .......................
Gallons ..........................
Gallons ..........................
Cubic inches...................
Cubic feet .......................
Pounds of water..............
Gallons ..........................
Pounds ..........................
Ounces ..........................
Pounds per sq.inch .........
0.0833
25.4
12
0.3333
3
0.00694
144
0.11111
9
0.00058
1728
0.03703
27
0.00433
7.48
231
0.1337
8.33
0.12004
0.0625
16
0.0361
To Change
To
Multiply By
Inches of water ............
Inches of water ............
Inches of water ............
Inches of mercury ........
Inches of mercury ........
Inches of mercury ........
Ounces per sq. inch .....
Ounces per sq. inch .....
Pounds per sq. inch.....
Pounds per sq. inch.....
Pounds per sq. inch.....
Pounds per sq. inch.....
Feet of water................
Feet of water................
Feet of water................
Atmospheres ...............
Atmospheres ...............
Atmospheres ...............
Long Tons...................
Short Tons ..................
Short Tons ..................
Inches of mercury............
Ounces per sq. inch ........
Pounds per sq. foot .........
Inches of water ...............
Feet of water ...................
Pounds per sq. inch ........
Inches of mercury............
Inches of water ...............
Inches of water ...............
Feet of water ...................
Inches of mercury............
Atmospheres...................
Pounds per sq. inch ........
Pounds per sq. foot .........
Inches of mercury............
Pounds per sq. inch ........
Inches of mercury............
Feet of water ...................
Pounds ..........................
Pounds ..........................
Long Tons ......................
0.0
0.5
5.2
13.
1.1
0.4
0.1
1.7
27.
2.3
2.0
0.0
0.4
62.
0.8
14.
29.
34
224
200
0.89

Volume
1 gal. (U.S.)
1 cu. ft.
= 128 fl. oz. (U.S.)
= 231 cu. in.
= 0.833 gal. (Brit.)
= 7.48 gal. (U.S.)

Pressure
1 lb. per sq. in.

1 ft. water at 60°F

1 in. Hg at 60°F

1 lb. per sq. in.
= 2.31 ft. water at 60°F.
= 2.04 in. hg at 60°F.
= 0.4333 lb. per sq. in.
= 0.884 in. hg at 60°F.
= 0.49 lb. per sq. in.
= 1.13 ft. water at 60°F.
= lb. per sq. in. gauge (psig) +
14.7Absolute (psia)
Temperature
°C
°F
= (°F —32) X .556
= C(1.8) + 32

Mass
1 lb. (avoir)
1 ton (short)
1 ton (long)
= 16 oz. (avoir.)
= 7000 grain
= 2000 lb.
= 2240 lb.

Flow
1 gpm

500 lb. per hr.
1 cu. ft. per min. (cfm)
= 0.134 cu. ft. per min.
= 500 lb. per hr. x sp. gr.
= 1 gpm ÷ sp. gr.
= 448.8 gal. per hr. (gph)

Formulas

Where
A = Area ; A1 = Surface area of solids;
V = Volume; C = Circumference

Rectangle
A = W x L
Rectangle Formulas

Parallelogram

A = H x L
Parallelogram Formulas

Trapezoid

Trapezoid Formulas
Triangle
Triangle Formulas

Circle

Circle Formulas

Sector of Circle

Sector of Circle Formulas

Ellipse

Ellipse Formulas

Rectangular Solid

Rectangular Solid Formulas

Cone

Cone Formulas

Cylinder

Cylinder Formulas

Elliptical Tanks

Elliptical Tanks Formulas

Sphere

Sphere Formulas