Hydraulic Engineer

HYDRAULIC ENGINEER is the most comprehensive hydraulic engineering calculator available on the App Store, featuring over 1,000 formulas across 13 specialized calculator categories, 8 temperature scale converters, and 8 professional reference tables.

CALCULATOR CATEGORIES

• Actuator Formulas — cylinder force, stroke, speed, and rod calculations
• Fluid Power — pressure, flow, horsepower, and torque calculations
• Pump Laws — affinity laws for speed, flow, pressure, and power
• Vehicle Drive — drive speed, tractive effort, gradeability, and drawbar pull
• Hydraulic Tubing — wall thickness, burst pressure, and working pressure
• Cylinder Calculations — extend/retract speed, rod end area, and cycle times
• Thermal Hydraulics — heat generation, reservoir cooling, heat exchangers, and energy to heat fluid
• Oil Velocity & Pressure Loss — pipe velocity, pressure drop per foot, and total system losses
• Pipe Flow — Reynolds number, Darcy-Weisbach head loss, laminar friction, and orifice flow
• Accumulator Sizing — discharge volume, precharge pressure, adiabatic and isothermal gas volumes
• Reservoir Sizing — open/closed circuit sizing, cylinder-based sizing, and oil weight calculations
• AC/DC Electrical — Ohm's law, power, resistance, inductance, and motor selection
• Area Formulas — 60 geometric area calculations for every common shape

700+ CONVERSION FORMULAS Pressure, horsepower, BTU, flow rates, linear measure, square measure, cubic measure, liquid measure, weights, watts, power, HVAC, metric, sand-to-volume, and fraction conversions.

8 TEMPERATURE SCALES Convert between Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, Newton, Delisle, and Romer — 56 conversion formulas covering every combination.

8 PROFESSIONAL REFERENCE TABLES

• Pipe Schedule (Schedule 40 & 80)
• ISO Viscosity Grades
• Recommended Flow Velocities
• Hydraulic Hose Sizing (SAE)
• JIC Thread Sizes
• Pipe Roughness Values
• O-Ring Sizes (AS568)
• Wire Rope Working Load Limits

KEY FEATURES

• Save and share any calculation result
• Share reference tables
• Calculation history
• Favorites for quick access to your most-used formulas
• Switch between US Customary and SI Metric units
• Dual-unit display shows both US and metric values simultaneously
• Dark mode optimized interface
• Works offline — no internet connection required

PREMIUM UPGRADE Unlock sharing, advanced calculator sections, and unlimited history with a one-time lifetime purchase — no subscriptions.

HYDRAULIC ENGINEER is designed for working hydraulic engineers, technicians, maintenance professionals, and engineering students. If there are formulas or reference tables you'd like to see added, just use the built-in feedback feature to let us know.