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US Quarter diameter
Exact matchUS 25-cent coin is 24.26mm
Coins & Currency
Conversion breakdown
24 mm to inches
mmtoinches.imView decimal inches, fractional inches (1/32" precision), and feet+inches for 24 millimeters. Perfect for CNC setups, woodworking, construction documents, and any workflow where a single metric dimension needs multiple imperial formats.
Decimal inches
0.9449"
24 mm = 0.9449" (rounded to four decimals)
Fractional inches (1/32")
15/16"
Error ±0.007382"
Feet + inches
0.9449"
Total inches 0.9449"
Real-world size reference
Visualize 24 mm with familiar everyday objects and common items for better understanding.
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Watch face size
Close matchSmall wristwatch case diameter
Everyday Items
Note about measurements
Exact matches indicate precise dimensional equivalence. Close matches show similar sizes for visual reference. Always verify exact specifications for precision work, especially in engineering, manufacturing, or construction applications.
Visual size comparison
See how 24 mm compares to common reference sizes
Sizes are scaled for comparison. Click "Show 1:1 actual size" above to see the true physical size.
Tip: This visualization helps you quickly understand the relative size of 24 mm. Toggle between scaled comparison and 1:1 actual size using the button above.
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Common questions about 24 mm
Quick answers to frequently asked questions about this measurement, conversions, and practical applications.
24 mm equals 0.9449 inches. This conversion uses the international standard where 1 inch = 25.4 millimeters exactly.
24 mm is approximately 15/16". Approximately 15/16", with a 0.19mm difference. Suitable for rough measurements but verify for precision work.
24mm is very close to the diameter of a US quarter (24.26mm), making it an excellent reference point.
Use millimeters when working with metric tools, international standards, or technical specifications. Use inches for imperial-system projects, construction in the US/UK, or when collaborating with teams using imperial measurements. For precision machining, decimal inches are preferred over fractions.
Acceptable tolerance depends on your application. General woodworking: ±0.5mm is typical. Metal fabrication: ±0.1-0.3mm. Precision machining: ±0.01-0.05mm. Electronics: ±0.02mm or tighter. Always check your project specifications or industry standards.
Still have questions? Try the interactive converter for more conversion options and tools.
Related conversions
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Conversion details
All calculations rely on the international standard of 1 inch = 25.4 millimeters. Decimal values are rounded to four places, fractional results use 1/32" increments with automatic simplification, and feet+inches formatting is ideal for dimensions above 300 mm. For higher precision, URL parameters, or bulk conversion needs, head back to the main calculator or batch converter.
At 24 mm (~0.9449 in), This falls in a common fabrication / home‑improvement range. Use decimal inches for calculations; fractional inches aid field readability; consider adding tolerances on drawings.