Conversions
Conversions
Conversions
INFORMATION /REF
Jump to conversion:
Length
English
Metric
mils
inches
feet
yards
Miles
nautical miles
Microns (um)
millimeters (mm)
Centimeters (cm)
meters
Kilometers (km)
Furlong
rods
light years
Area
English
Metric
Sq Mils
Sq Inches (sq in)
Sq Feet
Sq Yards
Sq Miles
Acre
Sq Microns
Sq millimeters
Sq Centimeters
Sq Meters
Sq Kilometers
Hectares
Volume
English
Length
Force
from
mils
Area
Volume
Temperature Velocity
from
inches
from
feet
Dry Volume
Acceleration
Mass
Time
from
yards
from
miles
1
1000
73200
36000
63360000
0.001
1
73.2
36
63360
8.33333E-05 0.083333333
6.1
3
5280
2.77778E-05 0.027777778 2.033333333
1
1760
1.57828E-08 1.57828E-05 0.001155303
0.000568182
1
1.37152E-08 1.37152E-05
0.00100395
0.000493746
0.868992758
25.4
25400
1859280
914400
1609344000
0.0254
25.4
1859.28
914.4
1609344
0.00254
2.54
185.928
91.44
160934.4
0.0000254
0.0254
1.85928
0.9144
1609.344
2.54E-08
0.0000254
0.00185928
0.0009144
1.609344
1.26263E-07 0.000126263 0.009242424
0.004545455
8
5.05051E-06 0.005050505
0.36969697
0.181818182
320
2.68264E-21 2.68264E-18 1.96369E-16
9.65749E-17
1.69972E-13
Note: Light years uses speed of light as 299,792,458 m/s and 1 yr = 365d, 5h, 48m, 46s.
All conversions are exact, with the stated definitions.
from
Sq Mils
from
Sq Inches
from
Sq Feet
from
Sq Yards
from
Sq Miles
1
1000000
144000000
1296000000
4.01449E+15
0.000001
1
144
1296
4014489600
6.94444E-09 0.006944444
1
9
27878400
7.71605E-10 0.000771605 0.111111111
1
3097600
2.49098E-16 2.49098E-10 3.58701E-08
3.22831E-07
1
1.59422E-13 1.59422E-07 2.29567E-05
0.000206611
639.99744
645.16
645160000 92903040000
8.36127E+11
2.58999E+18
0.00064516
645.16
92903.04
836127.36
2.58999E+12
6.4516E-06
6.4516
929.0304
8361.2736
25899881103
6.4516E-10
0.00064516
0.09290304
0.83612736
2589988.11
6.4516E-16
6.4516E-10
9.2903E-08
8.36127E-07
2.58998811
6.4516E-14
6.4516E-08
9.2903E-06
8.36127E-05
258.998811
Note: all conversions are exact.
All units except the acre are in international units in which 1 inch = 25.4mm exactly. This has bee
The official definition of the acre is still based on the 'US Survey foot', which was defined as 1200/
The calculations here convert between the acre and international units. To convert acre to and fro
from
cu Inches
1
0.000578704
2.14335E-05
3.324675325
from
cu Feet
1728
1
0.037037037
5745.038961
from
cu Yards
46656
27
1
155116.0519
from
teaspoons
0.30078125
0.000174063
6.44679E-06
1
from
tablespoons
0.90234375
0.00052219
1.93404E-05
3
English Fluid
English Fluid
Metric
tablespoon (tbsp)
Fluid Ounce
cup
pint (liquid)
quart (liquid)
gallon
Barrel
acre feet
cubic millimeters
cubic centimeters (cc)
cubic meters
milliliters (ml)
liters
Dry Volume
pint (dry)
quart (dry)
peck
bushel
liter
Mass
English
Troy
Metric
Grain
Ounce (av)
Pound (av)
Ton
Troy Ounce
Troy Pound
milligram
gram
kilogram
Metric ton
Power
watt
kilowatt (KW)
Horsepower (550 ft-lb)
Horsepower (electric)
BTUs per hour
from
quart (dry)
from
peck
from
bushel
from
liter
1
2
16
64
1.816165874
0.5
1
8
32
0.908082937
0.0625
0.125
1
4
0.113510367
0.015625
0.03125
0.25
1
0.028377592
0.5506105
1.101221
8.809768
35.239072
1
Conversion to and from liters is accurate to about 6 digits. Each conversion to/from liters uses its
In the English system dry unit is 1.1636 times larger than the equivalent liquid unit
from
grain
from
Ounce
from
Pound
from
ton
from
troy ounce
1
437.5
7000
14000000
480
0.002285714
1
16
32000
1.097142857
0.000142857
0.0625
1
2000
0.068571429
7.14286E-08
0.00003125
0.0005
1
3.42857E-05
0.002083333 0.911458333 14.58333333
29166.66667
1
0.000173611 0.075954861 1.215277778
2430.555556
0.083333333
64.79891 28349.52313
453592.37
907184740
31103.4768
0.06479891 28.34952313
453.59237
907184.74
31.1034768
6.47989E-05 0.028349523
0.45359237
907.18474
0.031103477
6.47989E-08 2.83495E-05 0.000453592
0.90718474
3.11035E-05
Conversions between metric and English units are accurate to about 10 significant digits.
av = avoirdupois
from
watts
1
0.001
0.001341022
0.001340483
3.412141633
from
kilowatts
1000
1
1.34102209
1.340482574
3412.141633
from
HP (550ft-lb)
745.6998716
0.745699872
1
0.999597683
2544.433578
from
HP (elec)
746
0.746
1.000402479
1
2545.457658
from
BTU/hr
0.29307107
0.000293071
0.000393015
0.000392857
1
0.737562149 737.5621493
550
550.2213634
0.216158128
Horsepower has several definitions. The 550 ft-lb and electric are the most common, and are ver
Conversions within watt, kilowatt, and Horsepower (electric) and BTUs per hour are exact. Betwe
Conversions between two sets of units lsted above are good to 15 or more significant digits.
newton-meters per second is the same numerically as watts
from
erg
Energy
erg
joule (watt second)
watt hour
kilowatt hour (KWH)
BTU
therm (US)
foot-pounds
calorie (heat)
calorie (food)
from
joule
from
watt-hour
from
KWH
from
BTU
1
10000000 36000000000
3.6E+13
10550558526
0.0000001
1
3600
3600000
1055.055853
2.77778E-11 0.000277778
1
1000
0.29307107
2.77778E-14 2.77778E-07
0.001
1
0.000293071
9.47817E-11 0.000947817 3.412141633
3412.141633
1
9.48043E-16 9.48043E-09 3.41296E-05
0.034129563
1.00024E-05
7.37562E-08 0.737562149 2655.223737
2655223.737
778.1692623
2.38846E-08 0.238845897 859.8452279
859845.2279
251.9957611
2.38846E-11 0.000238846 0.859845228
859.8452279
0.251995761
International Table units are used in all cases. Thermochemical units are slighly different by abou
All conversions are exact, with the possible exception of conversions between foot-pounds and ot
Newton-Meters is the same numerically as joules
from
ounce
Force
ounce-force
pound-force
dyne
newton
kilogram-force
1
16
0.0625
1
27801.3851 444822.1615
0.278013851 889.6443231
0.028349523
0.45359237
All conversions are exact
Temperature
Degrees Kelvin
Degrees Celsius
Degrees Fahrenheit
from
pound
from
Kelvin
0
-273.16
-459.688
from
Celsius
273.16
0
32
from
dyne
3.59694E-05
2.24809E-06
1
0.00001
1.01972E-06
from
newton
3.59694309
0.224808943
100000
1
0.101971621
from
kilogram
35.27396195
2.204622622
980665
9.80665
1
from
Fahrenheit
273.16
0
32
Velocity
English
from
ips
1
0.083333333
1.57828E-05
0.056818182
0.049374589
152.7272727
from
fps
12
1
0.000189394
0.681818182
0.592495063
1832.727273
from
miles/sec
63360
5280
1
3600
3128.37393
9676800
from
mph
17.6
1.466666667
0.000277778
1
0.868992758
2688
from
knots
20.25333333
1.687777778
0.000319655
1.150757576
1
3093.236364
Metric
0.0254
0.0000254
0.09144
8.47253E-11
0.3048
0.0003048
1.09728
1.0167E-09
1609.344
1.609344
5793.6384
5.36819E-06
0.44704
0.00044704
1.609344
1.49116E-09
0.514434667
0.000514435
1.8519648
1.71597E-09
Acceleration
Engilsh Metric
1
0.083333333
0.056818182
0.0254
0.0000254
0.09144
0.002590079
from
f/s/s
12
1
0.681818182
0.3048
0.0003048
1.09728
0.03108095
from
mph/s
17.6
1.466666667
1
0.44704
0.00044704
1.609344
0.045585394
from
m/s/s
39.37007874
3.280839895
2.236936292
1
0.001
3.6
0.101971621
Time
from
ps
from
ns
from
microsecond
from
ms
from
seconds
picosecond (ps)
1
1,000
1,000,000 1,000,000,000
1E+12
nanosecond (ns)
0.001
1
1,000
1,000,000 1,000,000,000
microsecond (us)
0.000001
0.001
1
1,000
1,000,000
millisecond (ms)
0.000000001
0.000001
0.001
1
1,000
seconds
1E-12 0.000000001
0.000001
0.001
1
minutes
1.66667E-14 1.66667E-11 1.66667E-08
1.66667E-05
0.016666667
hours
2.77778E-16 2.77778E-13 2.77778E-10
2.77778E-07
0.000277778
days
1.15741E-17 1.15741E-14 1.15741E-11
1.15741E-08
1.15741E-05
weeks
1.65344E-18 1.65344E-15 1.65344E-12
1.65344E-09
1.65344E-06
Fortnight
8.2672E-19
8.2672E-16
8.2672E-13
8.2672E-10
8.2672E-07
months (1/12th yr (365 day,3.80518E-19
except for last3.80518E-16
2)
3.80518E-13
3.80518E-10
3.80518E-07
year (365 day)
3.17098E-20 3.17098E-17 3.17098E-14
3.17098E-11
3.17098E-08
year (leap)
3.16232E-20 3.16232E-17 3.16232E-14
3.16232E-11
3.16232E-08
year (mean)
3.16888E-20 3.16888E-17 3.16888E-14
3.16888E-11
3.16888E-08
Note: year (mean) defined here as: defined here as 365 days, 5 hours, 48 minutes, and 46 secon
All conversions are exact, with the stated definitions
Month to year conversion is defined as exactly 12, for all 3 year types.
Data
bit (b)
nibble
byte (B)
kilobyte (KB)
megabyte (MB)
gigabyte (GB)
terabyte (TB)
from
bits
1
0.25
0.125
0.00012207
1.19209E-07
1.16415E-10
1.13687E-13
Note:
from
nibbles
4
1
0.5
0.000488281
4.76837E-07
4.65661E-10
4.54747E-13
from
bytes
8
2
1
0.000976563
9.53674E-07
9.31323E-10
9.09495E-13
from
kilobytes
8,192
2,048
1,024
1
0.000976563
9.53674E-07
9.31323E-10
from
megabytes
8,388,608
2,097,152
1,048,576
1,024
1
0.000976563
9.53674E-07
System memory and flash memory are generally manufactured in power of 2 data quantities, an
Disk drives are not manufactured in power of 2 data quantities, and are generally measured in b
Power
Data
Energy
from
nautical miles
from
microns
72912000
72912
6076
2025.333333
1.150757576
1
1851964800
1851964.8
185196.48
1851.9648
1.8519648
9.206060606
368.2424242
1.95596E-13
365d, 5h, 48m, 46s.
from
Acres
6.27267E+12
6272665.091
43560.17424
4840.01936
0.001562506
1
4.04687E+15
4046872610
40468726.1
4046.87261
0.004046873
0.404687261
0.039370079
3.93701E-05
3.28084E-06
1.09361E-06
6.21371E-10
5.39967E-10
1
0.001
0.0001
0.000001
0.000000001
4.97097E-09
1.98839E-07
1.05616E-22
from
Sq Microns
0.001550003
1.55E-09
1.07639E-11
1.19599E-12
3.86102E-19
2.47104E-16
1
0.000001
0.00000001
1E-12
1E-18
1E-16
#REF!
from
millimeters
39.37007874
0.039370079
0.00328084
0.001093613
6.21371E-07
5.39967E-07
1000
1
0.1
0.001
0.000001
4.97097E-06
0.000198839
1.05616E-19
from
Sq mm
1550.0031
0.001550003
1.07639E-05
1.19599E-06
3.86102E-13
2.47104E-10
1000000
1
0.01
0.000001
1E-12
1E-10
from
centimeters
393.7007874
0.393700787
0.032808399
0.010936133
6.21371E-06
5.39967E-06
10000
10
1
0.01
0.00001
4.97097E-05
0.001988388
1.05616E-18
from
Sq cm
155000.31
0.15500031
0.001076391
0.000119599
3.86102E-11
2.47104E-08
100000000
100
1
0.0001
1E-10
0.00000001
from
meters
39370.07874
39.37007874
3.280839895
1.093613298
0.000621371
0.000539967
1000000
1000
100
1
0.001
0.00497097
0.198838782
1.05616E-16
from
Sq meters
1550003100
1550.0031
10.76391042
1.195990046
3.86102E-07
0.000247104
1E+12
1000000
10000
1
0.000001
0.0001
from
kilometers
39370078.74
39370.07874
3280.839895
1093.613298
0.621371192
0.539967066
1000000000
1000000
100000
1000
1
4.970969538
198.8387815
1.05616E-13
from
Sq Kilometers
1.55E+15
1550003100
10763910.42
1195990.046
0.386102159
247.104393
1E+18
1E+12
10000000000
1000000
1
100
4mm exactly. This has been the official definition since 1959.
which was defined as 1200/3937 meters (making the inch 25.4000508..mm). The difference is only a factor of 0.999998 linearly, or 2 parts
s. To convert acre to and from the old 'US Survey' areas, remove the (0.999998)^2 factor
from
Fluid Ounces
1.8046875
0.001044379
3.86807E-05
6
from
cups
14.4375
0.008355035
0.000309446
48
from
pints
28.875
0.016710069
0.000618891
96
from
quarts
57.75
0.033420139
0.001237783
192
from
gallons
231
0.133680556
0.004951132
768
from
barrels
9702
5.614583333
0.207947531
32256
2
1
0.125
0.0625
0.03125
0.0078125
0.000186012
2.39755E-08
29573.52956
29.57352956
2.95735E-05
29.57352956
0.02957353
cubic inches per gallon as the basis.
16
32
64
8
16
32
1
2
4
0.5
1
2
0.25
0.5
1
0.0625
0.125
0.25
0.001488095
0.00297619 0.005952381
1.91804E-07
3.83608E-07 7.67216E-07
236588.2365
473176.473
946352.946
236.5882365
473.176473
946.352946
0.000236588
0.000473176 0.000946353
236.5882365
473.176473
946.352946
0.236588237
0.473176473 0.946352946
This is accurate to about 7 or 8 significant digits.
256
128
16
8
4
1
0.023809524
3.06886E-06
3785411.784
3785.411784
0.003785412
3785.411784
3.785411784
10752
5376
672
336
168
42
1
0.000128892
158987294.9
158987.2949
0.158987295
158987.2949
158.9872949
Dry Volume
pint (dry)
quart (dry)
peck
bushel
liter
ersion to/from liters uses its own factor from the US Dept of Commerce National Institute of Standards.
alent liquid unit
from
troy pound
5760
13.16571429
0.822857143
0.000411429
12
1
373241.7216
373.2417216
0.373241722
0.000373242
10 significant digits.
from
milligram
0.015432358
3.5274E-05
2.20462E-06
1.10231E-09
3.21507E-05
2.67923E-06
1
0.001
0.000001
0.000000001
from
ft-lb/sec
Power
1.355817948
0.001355818
0.001818182
0.00181745
4.626242868
watt
kilowatt (KW)
Horsepower (550 ft-lb)
Horsepower (electric)
BTUs per hour
from
gram
15.43235835
0.035273962
0.002204623
1.10231E-06
0.032150747
0.002679229
1000
1
0.001
0.000001
from
kilogram
15432.35835
35.27396195
2.204622622
0.001102311
32.15074657
2.679228881
1000000
1000
1
0.001
from
metric ton
Mass
15432358.35
35273.96195
2204.622622
1.102311311
32150.74657
2679.228881
1000000000
1000000
1000
1
Grain
Ounce (av)
Pound (av)
Ton
Troy Ounce
Troy Pound
milligram
gram
kilogram
Metric ton
from
therms
from
foot-pounds
from
calorie (heat)
from
calorie (food)
1.0548E+15
13558179.48
41868000 41868000000
105480400
1.355817948
4.1868
4186.8
29300.11111
0.000376616
0.001163
1.163
29.30011111
3.76616E-07
0.000001163
0.001163
99976.12898
0.001285067
0.003968321 3.968320719
1
1.28537E-08
3.96927E-08 3.96927E-05
77798350.53
1
3.088025207 3088.025207
25193560.71
0.323831554
1
1000
25193.56071
0.000323832
0.001
1
are slighly different by about 0.067%)
between foot-pounds and other units, which is accurate to at least 15 significant digits.
Energy
erg
joule (watt second)
watt hour
kilowatt hour (KWH)
BTU
therm (US)
foot-pounds
calorie (heat)
calorie (food)
Force
ounce-force
pound-force
dyne
newton
kilogram-force
from
ful/fort
0.006547619
0.000545635
1.0334E-07
0.000372024
0.000323286
1
from
m/s
39.37007874
3.280839895
0.000621371
2.236936292
1.943881439
6012.884753
from
Km/s
39370.07874
3280.839895
0.621371192
2236.936292
1943.881439
6012884.753
from
Km/h
10.93613298
0.911344415
0.000172603
0.621371192
0.539967066
1670.245765
from
c
11802852677
983571056.4
186282.3971
670616629.4
582760994.6
1.80262E+12
Velocity
inches per second (ips)
feet per second
miles per second
miles per hour (mph)
knot
Furlongs per fortnight
0.00016631
1.6631E-07
0.000598714
5.54749E-13
from
Km/s/s
39370.07874
3280.839895
2236.936292
1000
1
3600
101.9716213
from
minutes
6E+13
60,000,000,000
60,000,000
60,000
60
1
0.016666667
0.000694444
9.92063E-05
4.96032E-05
2.28311E-05
1.90259E-06
1.89739E-06
1.90133E-06
, 48 minutes, and 46 seconds
from
gigabytes
8,589,934,592
2,147,483,648
1,073,741,824
1,048,576
1,024
1
0.000976563
1
0.001
3.6
3.33564E-09
1000
1
3600
3.33564E-06
from
Km/h/s
10.93613298
0.911344415
0.621371192
0.277777778
0.000277778
1
0.02832545
from
G
386.0885827
32.17404856
21.93685129
9.80665
0.00980665
35.30394
1
from
hours
3.6E+15
3.6E+12
3,600,000,000
3,600,000
3,600
60
1
0.041666667
0.005952381
0.00297619
0.001369863
0.000114155
0.000113843
0.00011408
from
terabytes
8.79609E+12
2.19902E+12
1.09951E+12
1,073,741,824
1,048,576
1,024
1
from
days
8.64E+16
8.64E+13
86,400,000,000
86,400,000
86,400
1,440
24
1
0.142857143
0.071428571
0.032876712
0.002739726
0.00273224
0.002737909
Data
bit (b)
nibble
byte (B)
kilobyte (KB)
megabyte (MB)
gigabyte (GB)
terabyte (TB)
0.277777778
0.000277778
1
9.26567E-10
299792458
299792.458
1079252849
1
Acceleration
inches per second per second
feet per second per second
miles per hour per second
meters per second per second
kilometers per second per second
kilometers per hour per second
G (gravitational pull)
from
weeks
6.048E+17
6.048E+14
6.048E+11
604800000
604800
10080
168
7
1
0.5
0.230136986
0.002739726
0.00273224
0.002737909
from
fortnights
1.2096E+18
1.2096E+15
1.2096E+12
1,209,600,000
1,209,600
20,160
336
14
2
1
0.460273973
0.038356164
0.038251366
0.03833073
from
months
2.628E+18
2.628E+15
2.628E+12
2628000000
2628000
43800
730
30.41666667
4.345238095
2.172619048
1
0.083333333
0.083333333
0.083333333
from
Furlong
7920000
7920
660
220
0.125
0.108624095
201168000
201168
20116.8
201.168
0.201168
1
40
2.12465E-14
from
rods
198000
198
16.5
5.5
0.003125
0.002715602
5029200
5029.2
502.92
5.0292
0.0050292
0.025
1
5.31162E-16
from
Hectares
Area
1.55E+13
15500031
107639.1042
11959.90046
0.003861022
2.47104393
1E+16
10000000000
100000000
10000
0.01
1
Sq Mils
Sq Inches
Sq Feet
Sq Yards
Sq Miles
Acre
Sq Microns
Sq millimeters
Sq Centimeters
Sq Meters
Sq Kilometers
Hectares
from
light years
Length
3.72768E+20
3.72768E+17
3.1064E+16
1.03547E+16
5.88333E+12
5.11257E+12
9.4683E+21
9.4683E+18
9.4683E+17
9.4683E+15
9.4683E+12
4.70666E+13
1.88267E+15
1
mils
inches
feet
yards
Miles
nautical miles
Microns (um)
millimeters (mm)
Centimeters (cm)
meters
Kilometers (km)
Furlong
rods
light years
from
acre feet
from
cubic mm
from
cubic cc
from
cubic meters
75272131.63
43560.26136
1613.343013
250255398.7
6.10237E-05
3.53147E-08
1.30795E-09
0.000202884
0.061023744
3.53147E-05
1.30795E-06
0.202884136
61023.74409
35.31466672
1.307950619
202884.1362
from
mililiters
0.061023744
3.53147E-05
1.30795E-06
0.202884136
from
liters
61.02374409
0.035314667
0.001307951
202.8841362
83418466.22
41709233.11
5213654.139
2606827.07
1303413.535
325853.3837
7758.413897
1
1.23349E+12
1233489238
1233.489238
1233489238
1233489.238
6.7628E-05
3.3814E-05
4.22675E-06
2.11338E-06
1.05669E-06
2.64172E-07
6.28981E-09
8.10708E-13
1
0.001
0.000000001
0.001
0.000001
0.067628045
0.033814023
0.004226753
0.002113376
0.001056688
0.000264172
6.28981E-06
8.10708E-10
1000
1
0.000001
1
0.001
67628.0454
33814.0227
4226.752838
2113.376419
1056.688209
264.1720524
6.28981077
0.000810708
1000000000
1000000
1
1000000
1000
0.067628045
0.033814023
0.004226753
0.002113376
0.001056688
0.000264172
6.28981E-06
8.10708E-10
1000
1
0.000001
1
0.001
67.6280454
33.8140227
4.226752838
2.113376419
1.056688209
0.264172052
0.006289811
8.10708E-07
1000000
1000
0.001
1000
1
s per second
s per hour (mph)
from
years (365)
from
leap years
from
year (mean)
Time
3.1536E+19
3.16224E+19
3.15569E+19 picosecond (ps)
3.1536E+16
3.16224E+16
3.15569E+16 nanosecond (ns)
3.1536E+13
3.16224E+13
3.15569E+13 microsecond (us)
31,536,000,000 31,622,400,000 31,556,926,000 millisecond (ms)
31,536,000
31,622,400
31,556,926 seconds
525,600
527,040
525,949 minutes
8760
8784
8765.812778 hours
365
366
365.2421991 days
52.14285714
52.28571429
52.17745701 weeks
26.07142857
26.14285714
26.08872851 Fortnight
12
12
12 Months
1
1.002739726
1.000663559 year (365 day)
0.99726776
1
0.997929506 year (leap)
0.999336881
1.00207479
1 year (mean)
Volume
Cubic Inches
Cubic Feet
Cubic Yards
teaspoon
tablespoon
Fluid Ounce
cup
pint
quart
gallon
Barrel
acre feet
cubic millimeters
cubic centimeters (cc)
cubic meters
milliliters (ml)
liters