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Conversion Tables

Imperial/American to Metric (Fahrenheit to Celsius/centigrade) conversions for length and area, air, body and oven temperatures, and US to UK to Euro clothing conversion tables...

Officially Thailand uses the metric system of measurement for units and weights. However, distance, size, area and weight are frequently quoted in either Imperial (pounds, yards, feet and inches) or metric (kilogrammes, metres and centimetres).

Area - with reference to property, land and building - is frequently measured in Rai, Ngan and Wah.

Temperature is measured in degrees Celsius.

Conversions Tables
Length, Area, Weight, Volume Conversion
Imperial/US to Metric: Length
1 inch
2.54 centimetres (cm)
1 foot (ft) 12 inches (in) 0.3048 metre (m)
1 yard (yd) 3 ft 0.9144 m
1 mile 1,760 yd 1.60934 kilometres (km)
1 int nautical mile 2025.4 yd 1852 m
Metric to Imperial/US: Length
1 centimetre (cm) 10 millimetres (mm) 0.3937 in
1 m 100 cm 1.0936 yd / 3.38 ft / 39.37 in
1 kilometre (km) 1000 m 0.62137 mile / 5/8ths of a mile
Imperial/US to Metric: Area
1 in2
645.16 mm2
1 yd2 9 ft2 0.8361 m2
1 acre 4,840 yd2 4046.86 m2 / 0.405 hectare
1 mile2 640 acres 2.590  km2
Metric to Imperial/US: Area
1 cm2 100 mm2 0.1550  in2
1 metre2 square 10,000 cm2 1.1960 yd2
1 hectare (ha) 10,000 m2 2.471 acres
1 km2 100 ha 0.3861 mile2
Imperial/US to Metric: Weight Metric to Imperial: Weight
1 ounce 28.35 gram 1 gram 0.035 ounce
1 pound 453.59 gram 1 kilogram 2.2 pounds
Imperial/US to Metric: Volume Metric to Imperial: Volume
1 US pint 0.473 litres 1 litre 33.2 US / 35.2 Imperial fl ounces
1 Imperial pint 0.568 litres 1 litre 2.11 US / 1.76 Imperial pints
1 cup 0.237 litres 1 litre 4.228 cups
Area: Rai, Ngan, Wah/Hectares, Acres, Square feet
1 Hectare = 6.25 Rai = 2.47 Acres 1 Rai = 1600 square metres = 17,222 square feet
1 Acre = 0.4 hectare = 2.53 Rai 1 Ngan = 400 square metres = 4,306 square feet

1 Wah = 4 square metres = 43 square feet
Temperature and Energy Conversion
Temperature
Convert Fahrenheit to Celsius (degrees F - 32) x 0.555 degrees C
Convert Celsius to Fahrenheit (degrees C x 1.8) + 32 degrees F
Water Boils at 212° F 100° C
Normal body temperature 98.6° F 37° C
Water Freezes at 32° F 0° C
Room temperature 68° F 20° C
Air Temperatures: degrees Celsius (C) to degrees Fahrenheit (F)
0° C = 32° F 5° C = 41° F 10° C = 50° F 15° C = 59° F
20° C = 68° F 25° C = 77° F 30° C = 86° F 35° C = 95° F
Oven Temperatures
Gas Mark Celsius (C) Fahrenheit (F) Description
1/2 130 ° C 250 ° F Very Slow
1 140 ° C 275 ° F Very Slow
2 150 ° C 300 ° F Slow
3 170 ° C 325 ° F Slow
4 177 ° C 350 ° F Moderate
5 190 ° C 375 ° F Moderate
6 200 ° C 400 ° F Moderately Hot
7 220 ° C 425 ° F Hot
8 230 ° C 450 ° F Hot
9 245 ° C 475 ° F Hot
10 260 ° C 500 ° F Extremely Hot
Simple conversion formula: to convert Celsius to Fahrenheit minus 2, times 2, plus 32.
  • Example 16C: 16-2=14 x2=28 +32=60F
  • Online temperature conversion from CalculateMe: Click here
Energy Units
KWh (Kilowatt-hours) BTU ( British Thermal Unit)
1,000 kWh 3.41 million BTU
0.000293071 kWh 1 BTU
Several online converters help with complex energy conversions:
  • CalculateMe for energy conversions: Click here
  • For KWh/BTU conversions see unit conversion: Click here
Clothing and Shoe Conversion
Women's suits and dresses
USA/American UK/British European Thai
6 8 36 / Small Small
8 10 38 / Small Medium
10 12 40 / Med Large
12 14 42 / Med X Large
14 16 44 / Large XX Large
16 18 46 / Xtra-Large XXX Large
  • Website 85B provides an easy-to-use International Dress Size Calculator that accommodates US, UK, Euro, Italian, Japanese, Australian, New Zealand and other: Click here
Women's Shoes
6 4.5 37
6.5 5 38
7.5 6 39
8 6.5 40
8.5 7 41
  • For an online women's shoe size converter: Click here
Bras
  • Website 85B provides an easy-to-use International Bra Size Calculator that accommodates US, UK, Euro, Italian, Japanese, Australian, New Zealand and other: Click here
  • Website Breast Talk has clear, international bra size conversions: Click here
Men's Suits and Overcoats
USA/American UK/British Euro Thai
36 36 46
38 38 48
40 40 50
42 42 52
44 44 54
Men's Trousers
28 28 71 Small
30 30 76 Medium
32 32 81 Medium
34 34 87 Large
36 36 92 X Large
38 38 97 X Large
40 40 102 XX Large
42 42 107 XXX Large
44 44 112 XXXX Large
Men's Shoes
8 7.5 41
8.5 8 42
9.5 9 43
10 9.5 44
  • For an online men's shoe size converter: Click here
Children's Clothes
USA/American
(in years)
UK/British (height in inches) European (height in cm) Thai
3 38 98
4-5 43 104 6
6 45 110
7-8 47 116 8
9 50 122 10
10 60 128 12
11 52 134-140 14
  • For conversions of infant and child clothes and shoes from US to European standard sizes see website Kidstock: Click here

Euro children's shoe sizes are measured in centimetres; 1cm=1 size.

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