Engineering Calculator Suite

Professional practical calculators for design, estimation and daily engineering work.

← All Tools

Engineering Unit Converter Pro

Hundreds of direct engineering conversion routes.

Open Engineering Converter →

HVAC

BTU/h to kW kW to BTU/h Ton Refrigeration to kW kW to Ton Refrigeration CFM to m³/h m³/h to CFM Air Velocity Calculator Airflow from Velocity & Area Fresh Air from ACH Sensible Heat from Airflow Chilled Water Flow from Load Heating Water Flow from Load Coil Capacity from Water Flow Fan Power Calculator Fan Law — New Airflow Fan Law — New Pressure Fan Law — New Power Filter Area Calculator Louver Gross Area External Static Pressure Total

Electrical

Three Phase Current Single Phase Current Three Phase Power Single Phase Power kVA to Amps — 3 Phase kVA to Amps — 1 Phase kW to kVA kVA to kW Electrical Energy Consumption Electricity Cost Calculator UPS Runtime Estimate Battery Energy Calculator Transformer Full Load Current

Plumbing

Water Velocity in Pipe Pipe Flow from Velocity Pump Hydraulic Power Pump Input Power Water Tank Sizing Circular Pipe Area

Fire Fighting

Sprinkler Flow from K-Factor Sprinkler Pressure Required Fire Water Tank Volume Nozzle Flow Estimate

Civil / Construction

Concrete Volume Slab Concrete Volume Rebar Weight Brick Quantity Estimate Concrete Block Quantity Paint Quantity Calculator Tile Quantity Calculator Excavation Volume

Mechanical

Torque from Power & RPM Power from Torque & RPM Gear Ratio Pulley Speed Calculator Hydraulic Cylinder Force Pneumatic Cylinder Force

Solar & Energy

Solar Panel Count Solar Array Size Battery Bank Sizing Solar Simple Payback

Lighting

Lumens Required Lighting Fixture Count

© 2026 Kjoumaa.com — Engineering Calculator Suite