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A handy unit conversion tool and a solid record of units in our era, showing 79 units, 6 equations and 20 metric prefixes.

The Unit Conversion Card

    • 3 tables and 54 units on the front side: units of length, area and volume
    • 4 tables, 25 units, 6 equations and 20 metric prefixes on the back side: units of mass, pressure, temperature conversions and metric (SI) prefixes
    • All italic figures on the card are exact, as indicated in the bottom-right corner on each side
    • The engravings are golden in colour and reflective under light
    • Laser-engraved words, symbols and numbers will never fade nor wear off
    • Thickness is enhanced to 0.6 mm to ensure the card is highly rigid and durable
    • Same size as a credit card (85.5 mm x 54 mm)
    • 608% funded on Kickstarter:
    • All images are for reference only. The photos may be slightly different from the actual item in terms of colour due to the lighting during photo shooting or the monitor's display.
    • The card sleeve shown in the product images is not included. It can be purchased here:
    • Dimensions: 85.5 mm x 54 mm (with rounded corners)
    • Thickness: 0.6 mm ± 0.03 mm
    • Material: brass (black-plated)
    • Colour: black
    • Colour of the engraved information: gold
    • Place of origin: Taiwan
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