The importance of recent National Metric Day for 2025 on Monday, October 13th leads me to the showing of a conversion table and some resources for your viewing, with both metric and customary conversions. Enjoy!
metric system courtesy of Openverse
🥳 Metric Conversion Chart
ID 177245754 @ Juliedeshaies | Dreamstime.com
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🤞 Synopsis:
Here is a metric conversion chart which also shows popular U.S. used customary (“English system”) conversions and some insight as to what mathematical formulas are needed in order to convert from old style customary over to metric and insight of some odd measurements.
| Metric & English Conversion | |||
| Length (Distance) | |||
| Metric | Unit | Customary | Conversion |
| Kilometer | 1 | Mile (mi) | 0.621371192237334 mile |
| — | — | Nautical Mile (NM) | 1.1507794480235425 mi |
| — |
— |
Yard = 3 × Feet | — |
| Meter (m) | 1 | Foot (ft | ‘) | 3.2808398950131233 |
| Centimeter (cm) | 1 | Inch (in | “) | 0.3937007874015748 |
| Astronomic Distance | |||
| Distance | Unit |
Measure | Customary Conversion |
| Light year | 63241.07708426628 | AU | — |
| Astronomical Unit | 149,597,870.7 | km | 92,955,807.273 mi |
| Area | |||
| Metric | Unit | Customary | Conversion |
| Sq. Kilometer (km2) | 1 | Square Mile (sq mi) | 0.38610215854244585 |
| Sq. Kilometer (km2) | 1 | Acre (ac) | 247.10538146716533 |
| — | — | Acre (ac) | 640 ac = 1 sq mi |
| Sq. Meter (m2) | 1 | Sq. Yard (sq yd) | 1.195990046301080300672 |
| — | — | Sq. Foot (sq ft) | 9 sq ft = 1 sq yd |
| Mass (Weight) |
|||
| Metric | Unit | Customary | Conversion |
| Tonne (t) 1000 kg | 1 metric ton | Ton (T) 2000 lbs | 1.1023113109243878 |
| Kilogram (kg) | 1 | Pound (lb) | 2.2046226218487755 |
| Gram (g) | 1 | Ounces (oz) 1/16 lb |
0.0352739619495804150 |
| Milligram (mg) | 1/1000 g | — | — |
| Time |
|||
| Time was tried a conversion to metric but left remainders with every attempt. Current earth time is so precise, that it only has to have a leap second determined every so many years on a June 30th. As is, the leap year is every 4 years, except one skip every hundred years on the century marker. Then skip the skip every 400 year (last such skip was in 2000 AD) On March 1, 2000, the time was within 1 microsecond of where the calendar and clock were on March 1, 1600 & where it will be on March 1, 2400. | |||
| Unit | Conversion | — | — |
| microsecond (μs) | millionth of second | — | — |
| Temperature |
|||
| Metric | Unit | Customary | Conversion |
| -273.15°C (Celsius) | Absolute Zero | -460.0°F | Fahrenheit (°F) |
| 0°C (Celsius) | Freezing Point | 32°F | Fahrenheit (°F) |
| 100°C (Celsius) | Boiling Point | 212°F | Fahrenheit (°F) |
| 10-15 million°C | Fusion Point Sun | — | — |
| Speed |
|||
| Metric | Unit | Customary | Conversion |
| Kilometers per hour | 1 kph | Miles per hour | 0.6213711922373837 mph |
| Kilometers per hour | 16.09344 kph | Miles per hour | 10 mph |
National Bureau of Standards publication 304 courtesy of National Bureau of Standards – archives
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The conversion of the United States has been attempted several times in the past, with the most vigorous attempt in 1975. The United States uses the metric system a lot, but there really is no exact adoption, just a percentage. The metric system remains not completely adopted as of present. The metric system is estimated to be used worldwide by at or near 95% of the world at large.
Day 252: Metric System courtesy of Openverse
National Metric Day
