UnitDeck

UnitDeck is a clean, fast, offline unit converter built for engineers, students, makers, and anyone who works with numbers every day.

Type a value once and see it converted to every related unit at the same time. No ads, no accounts, no tracking, no permissions required.

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WHAT YOU CAN CONVERT
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• Length — mm, cm, m, km, in, ft, yd, mi, nmi, µm, nm
• Area — mm², cm², m², ha, km², in², ft², yd², acre, mi²
• Volume — mL, L, m³, cm³, in³, ft³, US/UK gallons, quarts, pints, fl oz, cups, tbsp, tsp, oil barrel
• Mass — µg, mg, g, kg, tonne, oz, lb, stone, US/UK ton
• Time — ns, µs, ms, s, min, h, day, week, month, year
• Temperature — Celsius, Fahrenheit, Kelvin, Rankine
• Speed — m/s, km/h, mph, ft/s, knot, Mach
• Force — mN, N, kN, dyne, kgf, lbf, ozf
• Pressure — Pa, kPa, MPa, bar, mbar, atm, psi, Torr, mmHg, inHg
• Energy — J, kJ, cal, kcal, Wh, kWh, eV, BTU, ft·lbf
• Power — mW, W, kW, MW, metric hp, mechanical hp, BTU/h
• Angle — degree, radian, gradian, arc-min, arc-sec, turn
• Data — bit, byte, kB, KiB, MB, MiB, GB, GiB, TB, TiB, PB
• Frequency — Hz, kHz, MHz, GHz, THz, rpm

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DESIGNED FOR SPEED
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• Type once, read everywhere. Every target unit updates as you type.
• One-tap copy. Tap any result to copy it to the clipboard.
• Paste supported. Grab a number from anywhere and drop it in.
• Remembers your last used category and source unit per category.
• Material 3 interface with automatic light and dark theme.

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PRIVACY FIRST
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• 100% offline. Zero network calls.
• No permissions requested. Nothing to grant, nothing to revoke.
• No analytics, no ads, no third-party SDKs.
• No account, no sign-in.
• Your data never leaves your device.

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WHO IT'S FOR
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• Mechanical, civil, electrical, and software engineers
• Students and teachers of science and math
• Makers, hobbyists, DIY builders, and 3D printing enthusiasts
• Anyone tired of ad-filled converter apps that fight for attention

Small, fast, and to the point. That's UnitDeck.

If you find a unit missing or spot a value you want us to double-check, get in touch — we're glad to iterate.