Convert Square Centimeter to Square Thou
Convert square centimeters to square thous instantly. 1 square centimeter = 155000.31000062 square thou — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Thou to Square Centimeter converter for the reverse conversion.
Units explained
Square Centimeter
A square centimeter is a metric unit of area equal to 10⁻⁴ m² (1 cm × 1 cm). It is widely used in everyday measurement, lab work, and small-area applications.
Derived by squaring the centimeter (1/100 of a meter). The centi- prefix comes from the Latin 'centum' (hundred).
Square centimeters express the cross-sectional area of pipes and cables, the surface area of small everyday objects, biological tissue samples, and many engineering quantities. The SI unit for medical/pharmaceutical dose-per-area is often expressed in cm².
Centimeter has been part of the metric system since 1795.
Square Thou
A square thou is an imperial unit of area equal to 6.4516×10⁻¹⁰ m², identical to the square mil. The word 'thou' is short for 'thousandth' (of an inch).
Identical in value to the square mil; 'thou' is the British engineering term, 'mil' is the American term. Both refer to 1/1000 of an inch.
Square thous are used in British and Commonwealth engineering contexts where 'thou' is preferred over 'mil', particularly in mechanical engineering tolerance specifications.
Standardized via the 1959 International Yard and Pound Agreement.
Square Centimeter to Square Thou conversion formula
The relationship between square centimeters and square thous:
To convert square centimeters to square thous, multiply the value in square centimeters by 155000.31000062. To reverse, multiply square thous by 6.4516e-6.
How to use this converter
Type a value into the calculator. The result in square thous updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Thou to Square Centimeter converter for the reverse direction.
Step-by-step: convert square centimeters to square thous
- Write down the value in square centimeters (cm²).
- Multiply that value by the factor 155000.31000062.
- The product is the equivalent value in square thous (thou²).
- To reverse, multiply the square thou value by 6.4516e-6.
Worked examples
Example 1 — Convert 1 cm² to thou²:
1 × 155000.31000062 = 155000.31000062 thou²
Example 2 — Convert 100 cm² to thou²:
100 × 155000.31000062 = 1.550003e+7 thou²
Real-world example — Mid-micron to nanometer
3 square centimeters equals 3,000 square thous — useful when relating mid-infrared wavelengths (typically quoted in microns) to nanometer-scale visible-light wavelength tables.
3 cm² × 155000.31000062 = 465000.9300018601 thou²
Real-world example — From microns to sub-micron features
One square centimeter equals one thousand square thous — the conversion semiconductor designers do constantly when comparing mask feature dimensions to actual transistor gate lengths.
1 cm² × 155000.31000062 = 155000.31000062 thou²
Real-world example — Infrared to visible-spectrum mapping
A 10-square centimeter thermal infrared wavelength corresponds to a much larger number in square thous, the unit favoured for ultraviolet and visible-light specifications.
10 cm² × 155000.31000062 = 1550003.1000062004 thou²
Square Centimeter to Square Thou conversion table
Standard reference values for converting square centimeters to square thous:
| Square Centimeter [cm²] | Square Thou [thou²] |
|---|---|
| 0.01 | 1550.0031000062 |
| 0.1 | 15500.031000062 |
| 1 | 155000.31000062 |
| 2 | 310000.6200012401 |
| 3 | 465000.9300018601 |
| 4 | 620001.2400024801 |
| 5 | 775001.5500031002 |
| 10 | 1550003.1000062004 |
| 20 | 3100006.2000124007 |
| 30 | 4650009.3000186011 |
| 40 | 6200012.4000248015 |
| 50 | 7750015.5000310009 |
| 100 | 1.550003e+7 |
| 500 | 7.750016e+7 |
| 1000 | 1.550003e+8 |
Frequently asked questions
How many square thous is 1 square centimeter?
How do I convert square centimeters to square thous?
How do I convert square thous back to square centimeters?
How many square thous is 100 square centimeters?
Popular area unit conversions
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Metric / SI (15 units)
Imperial / US Customary (15 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Sources & references
Conversion factor (1 cm² = 155000.31000062 thou²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.