Cable & Wire Calculator Dashboard

🔌 CABLE & WIRE CALC Dashboard 9 Calculators

Overview

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Calculators

9

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Materials

Cu / Al

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Phase Support

1Φ & 3Φ

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Standards

IEC / BS

Calculators

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Cable Size by Current

Select cable cross-section from load current

I_design = I_load / (Ca × Cg × Ci)  |  Select cable ≥ I_design

Load Current (A)

Cable Material Copper Aluminium

Ambient Temp (°C)

No. of Cables (Grouping)

Installation Method In Conduit / Trunking Clipped Direct On Tray (Touching) On Tray (Spaced) In Free Air Buried in Ground

Insulation PVC (70°C) XLPE (90°C)

Recommended Cable Size

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Size (mm²)	Base Rating (A)	Derated Rating (A)	Status

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Voltage Drop Calculator

Voltage drop across cable run

VD = (2 × ρ × L × I) / A [1Φ]  |  VD = (√3 × ρ × L × I) / A [3Φ]

Current (A)

Cable Length (m)

Cable Size (mm²) 1.52.5 46 1016 2535 5070 95120 150185 240300

Material Copper (0.0175 Ω·mm²/m) Aluminium (0.028 Ω·mm²/m)

System Voltage (V)

Phase 3-Phase 1-Phase

Voltage Drop

—

Drop %

—

Receiving Voltage

—

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Cable Size by Voltage Drop

Min cable size to keep drop within limit

A = (ρ × mult × L × I) / VD_allowed  [mm²]

Load Current (A)

Cable Length (m)

System Voltage (V)

Max Voltage Drop (%)

Material Copper Aluminium

Phase 3-Phase 1-Phase

Calc. Area

—

Std. Size

—

Actual Drop

—

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Cable Resistance & Impedance

R, X, Z per metre & total

R = ρ × L / A  |  Z = √(R² + X²)  [Ω]

Cable Size (mm²)

Cable Length (m)

Temperature (°C)

Material Copper (α=0.00393) Aluminium (α=0.00403)

Reactance X (mΩ/m) — optional

R/m (mΩ)

—

Total R (Ω)

—

Total X (Ω)

—

Total Z (Ω)

—

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Cable Ampacity (Current Capacity)

Rated current capacity with derating

I_rated = I_base × Ca × Cg × Ci  [Derating Factors]

Cable Size (mm²) 1.52.5 46 1016 2535 5070 95120 150185 240300

Material Copper Aluminium

Ambient Temp (°C)

Grouping (No. of cables)

Insulation PVC (70°C) XLPE (90°C)

Installation In Conduit / Trunking (Ci=1.0) Clipped Direct (Ci=1.20) Cable Tray – Touching (Ci=1.0) Cable Tray – Spaced (Ci=1.15) In Free Air (Ci=1.30) Buried Direct (Ci=0.90)

Base Rating

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Temp Factor Ca

—

Group Factor Cg

—

Derated Rating

—

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Short Circuit Withstand

Min cable size for fault current

A = (I_sc × √t) / k  [mm²]  Cu:k=115(PVC),143(XLPE) | Al:k=76(PVC),87(XLPE)

Fault Current (kA)

Fault Duration (s)

Material Copper Aluminium

Insulation PVC (70°C) XLPE (90°C)

Min. Area (mm²)

—

Std. Cable Size

—

k Factor

—

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Power Loss in Cable

I²R losses & energy cost

P_loss = conductors × I² × R  [W]  |  Energy = P × Hours / 1000 [kWh]

Current (A)

Cable Size (mm²)

Cable Length (m)

System Voltage (V)

Material Copper Aluminium

Phase 3-Phase 1-Phase

Power Factor

Energy Rate (৳/kWh)

Power Loss

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Loss %

—

Daily Cost

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Monthly Cost

—

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Conduit Size Calculator

Conduit size for cable bundles

Fill Ratio ≤ 40% (multi-cable) or 53% (single)  |  A_conduit ≥ ΣA_cable / fill

Cable Size (mm²) 1.52.5 46 1016 2535 50

Number of Cables

Cable Type Single Core 3-Core Multicore 4-Core Multicore

Conduit Type Round (PVC/Steel) Rectangular Trunking

Total Cable Area

—

Min. Conduit Ø

—

Std. Conduit Size

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Cable All-in-One Summary

Complete cable sizing: Current capacity + Voltage drop + Power loss + Conduit — all in one

Complete cable check: Load → I → Size(Current) vs Size(VDrop) → Final → VDrop% → Power Loss → Conduit

Load Power (kW)

System Voltage (V)

Power Factor

Cable Length (m)

Material Copper Aluminium

Phase 3-Phase 1-Phase

Max VDrop (%)

Load Current

—

Size by Current

—

Size by VDrop

—

Final Recommended

—

Voltage Drop

—

Drop %

—

Power Loss

—

Conduit Size

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