Tools - KEE Engineering

Conversions

Area & Volume Calculator

Calculate area and rectangular volume.

Length (ft) Width (ft) Height / Depth (ft)

Formula used

Area = length × width
Volume = length × width × height

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Ohm's Law Calculator

Enter any two values to calculate the others.

Volts (V) Amps (A) Ohms (Ω) Watts (W)

Formula used

V = I × R
P = V × I
P = I² × R
P = V² ÷ R

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Temperature Converter

Convert between Fahrenheit and Celsius.

Fahrenheit (°F) Celsius (°C)

Formula used

°C = (°F − 32) × 5 ÷ 9
°F = (°C × 9 ÷ 5) + 32

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Unit Converter

Quick common field conversions.

Feet Inches Gallons PSI

Formula used

ft × 0.3048 = m
in × 25.4 = mm
gal × 3.78541 = L
psi × 0.0689476 = bar

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Electrical

Battery Runtime Calculator

Estimate runtime from battery capacity, load, usable capacity, and efficiency.

Battery Voltage (V) Battery Capacity (Ah) Load (W) Usable Battery % Efficiency %

Formula used

Usable Wh = volts × Ah × usable %
Runtime = usable Wh × efficiency % ÷ load watts

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Ohm's Law Calculator

Enter any two values to calculate the others.

Volts (V) Amps (A) Ohms (Ω) Watts (W)

Formula used

V = I × R
P = V × I
P = I² × R
P = V² ÷ R

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Power Supply Sizing Calculator

Add margin to a known DC load current.

Known Load Current (A) Safety Margin %

Formula used

Recommended amps = load amps × (1 + margin %)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Voltage Drop Calculator

Estimate voltage drop using a conductor table or custom resistance.

Method Phase Voltage (V) Load Current (A) One-way Distance (ft) Material Wire Size Custom Ω / 1000 ft

Formula used

Single-phase/DC VD = 2 × I × D × Ω/1000
Three-phase VD = √3 × I × D × Ω/1000
Drop % = VD ÷ source voltage × 100

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

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4-20mA Signal Scaling Calculator

Convert a 4-20mA signal to engineering units.

Signal (mA)Low Engineering ValueHigh Engineering Value

Formula used

Percent = (mA − 4) ÷ 16
Value = low + percent × (high − low)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Area & Volume Calculator

Calculate area and rectangular volume.

Length (ft) Width (ft) Height / Depth (ft)

Formula used

Area = length × width
Volume = length × width × height

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Battery Runtime Calculator

Estimate runtime from battery capacity, load, usable capacity, and efficiency.

Battery Voltage (V) Battery Capacity (Ah) Load (W) Usable Battery % Efficiency %

Formula used

Usable Wh = volts × Ah × usable %
Runtime = usable Wh × efficiency % ÷ load watts

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Concrete Calculator

Estimate concrete for slabs, footings, and round piers.

Shape / Type Waste % Length (ft) Width (ft) Thickness / Height (in) Diameter (in, round only)

Formula used

Cubic yards = cubic feet ÷ 27
Round pier volume = π × radius² × height

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Control Transformer Sizing Calculator

Estimate control transformer VA from steady load, inrush, and margin.

Steady Load VA Largest Inrush VA Safety Margin %

Formula used

Minimum VA = (steady VA + inrush VA) × (1 + margin %)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Heat Trace Load Calculator

Estimate heat trace watts and current.

Cable Length (ft)Cable Watts / ftVoltage (V)

Formula used

Watts = length × watts/ft
Current = watts ÷ volts

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Motor FLA Estimator

Estimate motor full-load current from HP, voltage, phase, efficiency, and power factor.

Horsepower (HP) Voltage (V) Phase Efficiency % Power Factor

Formula used

3-phase A = HP × 746 ÷ (√3 × V × efficiency × PF)
1-phase A = HP × 746 ÷ (V × efficiency × PF)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Ohm's Law Calculator

Enter any two values to calculate the others.

Volts (V) Amps (A) Ohms (Ω) Watts (W)

Formula used

V = I × R
P = V × I
P = I² × R
P = V² ÷ R

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Power Supply Sizing Calculator

Add margin to a known DC load current.

Known Load Current (A) Safety Margin %

Formula used

Recommended amps = load amps × (1 + margin %)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Pump Runtime Calculator

Estimate pump run time from volume and flow.

Volume (gal)Pump Flow (GPM)

Formula used

Runtime minutes = gallons ÷ GPM

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Sensor Range Scaling Calculator

Scale a raw input value to an engineering range.

Raw InputRaw LowRaw HighEngineering LowEngineering High

Formula used

Percent = (raw − raw low) ÷ (raw high − raw low)
Value = engineering low + percent × engineering span

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Solar Sizing Calculator

Rough solar array and battery bank sizing for DC systems.

Daily Load (Wh/day) Sun Hours System Voltage (V) Reserve Days Usable Battery % System Loss %

Formula used

Solar watts = daily Wh ÷ sun hours × loss factor
Battery Ah = daily Wh × reserve days ÷ (system volts × usable %)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Temperature Converter

Convert between Fahrenheit and Celsius.

Fahrenheit (°F) Celsius (°C)

Formula used

°C = (°F − 32) × 5 ÷ 9
°F = (°C × 9 ÷ 5) + 32

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Unit Converter

Quick common field conversions.

Feet Inches Gallons PSI

Formula used

ft × 0.3048 = m
in × 25.4 = mm
gal × 3.78541 = L
psi × 0.0689476 = bar

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

VFD Speed / Frequency Calculator

Estimate motor speed from frequency, pole count, and slip.

Frequency (Hz) Motor Poles Slip %

Formula used

Synchronous RPM = 120 × frequency ÷ poles
Loaded RPM = synchronous RPM × (1 − slip %)

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Voltage Drop Calculator

Estimate voltage drop using a conductor table or custom resistance.

Method Phase Voltage (V) Load Current (A) One-way Distance (ft) Material Wire Size Custom Ω / 1000 ft

Formula used

Single-phase/DC VD = 2 × I × D × Ω/1000
Three-phase VD = √3 × I × D × Ω/1000
Drop % = VD ÷ source voltage × 100

Quick reference only. Verify final designs against applicable codes, site conditions, and manufacturer data.

Ohm's Law Calculator

Voltage Drop Calculator

Battery Runtime Calculator

Ohm's Law / Power Calculator

Voltage Drop Calculator

Battery Runtime Calculator

Solar Sizing Calculator

4-20mA Signal Calculator

Heat Trace Load Calculator

Pump Runtime Calculator

Unit Converter

Area / Volume Calculator

Power Supply Sizing Calculator

Temperature Converter

Concrete Slab Calculator

Concrete Pier / Sonotube Calculator