convertX - Unit Converter

ConvertX gives engineers, students, and everyday users the most complete
unit converter in their pocket. 44 categories. 400+ units. Offline.

EVERYDAY — FREE FOREVER
Length · Weight · Temperature · Area · Volume · Speed · Time
Data Storage · Pressure · Energy · Power · Angle · Fuel · Frequency

LIVE CURRENCY
30 currencies updated in real-time. Works offline with cached rates.
No account. No sign-up. Just convert.

ENGINEERING SUITE — PRO
The only converter with a complete professional engineering toolkit:

Mechanical: Force · Torque · Stress · Density · Dynamic Viscosity
Kinematic Viscosity · Acceleration · Angular Velocity
Civil: Flow Rate · Stress Intensity · Illuminance · Concentration
Water Hardness
Electrical: Voltage · Resistance · Capacitance · Inductance
Current Density
Thermal / HVAC: Thermal Conductivity · Heat Flux · Cooling Load
Specific Heat
Science: Radiation Dose · Radioactivity · Molar Amount
Acoustics: Sound Level · Luminous Intensity
Material Science: Hardness (HRC / HV / HB / Shore) · Elastic Modulus

DESIGNED FOR REAL USE
• 48-point bold numbers — your result fills the screen
• Dark neon UI — no eye strain in the field or lab
• Tap any unit row to set it as your conversion target
• Swap units with one tap — no fumbling
• Copy result to clipboard instantly
• Favorites — pin your most-used converters to the top
• History — last 50 conversions saved automatically
• 100% offline — no internet needed for any unit conversion

PRIVACY FIRST
No account. No tracking. No personal data collected.

PRO — $4.99 ONCE, YOURS FOREVER
Unlock all 29 engineering categories with a single one-time purchase.
No subscription. No monthly fee. Lifetime access including all future
engineering categories added to the app.

ConvertX is the converter engineers reach for on-site, students use in
the lab, and travellers rely on for currency — all in one place.