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Engineering Toolkit
91 engineering calculators, converters and references in one searchable app.
The Mixadù Engineering Toolkit is a searchable collection of 91 engineering calculators, unit converters and reference tools — from pressure, flow and velocity to beam loads, concrete volume, gravel, asphalt and rebar weight. Every tool runs entirely in your browser: no sign-up, no uploads, and your inputs never leave your device.
- 91 engineering tools in one place
- Unit converters: pressure, flow, length, area, mass, density, force, power, temperature, velocity
- Construction calculators: concrete, gravel, asphalt, rebar, tile, paint, roofing
- Works offline once loaded — private by design
Frequently asked questions
Is the Engineering Toolkit free?
Yes. All 91 tools are completely free, with no login or sign-up.
Are my inputs uploaded anywhere?
No. Every calculation runs locally in your browser; nothing is sent to a server.
Which unit conversions are supported?
Pressure, flow, length, area, volume, mass, density, force, power, temperature, velocity and more.
Does it work on mobile?
Yes. The toolkit is fully responsive and works on phones and tablets.
All 91 engineering tools
Construction (8)
- Asphalt Calculator
- Concrete Volume
- Gravel Calculator
- Mulch Calculator
- Paint Calculator
- Roof Calculator
- Tile Calculator
- Topsoil Calculator
Converters (12)
- Area Converter
- Density Converter
- Electrical Current Converter
- Flow Converter
- Force Converter
- Length Converter
- Mass Converter
- Power Converter
- Pressure Converter
- Temperature Converter
- Torque Converter
- Volume Converter
Electrical (8)
- Battery Runtime
- Conductor Resistance
- Current Draw
- Electrical Power
- Frequency
- Ohm's Law
- Voltage Drop
- Wire Gauge (AWG)
Geometry (8)
Geotechnical (8)
- Bearing Pressure
- Effective Stress
- Lateral Earth Pressure
- Pore Water Pressure
- Relative Compaction
- Relative Density
- Slope Ratio
- Soil Unit Weight
HVAC (6)
- Air Changes per Hour
- BTU / Tons / kW
- CFM from Air Changes
- Envelope Heat Loss
- Hydronic Flow
- Psychrometrics
Hydraulics (10)
- Darcy-Weisbach Head Loss
- Flow Rate
- Flow Velocity
- Manning Equation
- Open Channel Flow
- Pipe Area
- Pipe Volume
- Pressure ↔ Head
- Pump Power
- Reynolds Number
Materials (9)
- Aluminum (6061)
- Concrete (normal-weight)
- Copper
- HDPE
- PVC
- Soil (typical)
- Steel (A36/A992)
- Water (4 °C)
- Wood (Douglas Fir)
Structural (8)
- Beam Deflection
- Beam Load Summary
- Concrete Strength
- Rebar Area
- Rectangular Section
- Simple Beam Moment
- Simple Beam Shear
- Steel W-Shapes
Survey (7)
- Bearing ↔ Azimuth
- Decimal Feet ↔ Inches
- Feet-Inches ↔ Decimal
- Grade Between Points
- Inverse (Coordinates)
- Slope / Grade
- Stationing