⚙ CircuitSecrets

Cable & Wire Calculator Dashboard

Complete engineering suite for cable sizing, voltage drop, short circuit, and power loss calculations based on IEC/BS standards.

Size by Current Voltage Drop Size by VDrop Resistance Ampacity Short Circuit Power Loss Conduit Size All-in-One Weight & Cost

Calculator 01

Cable Size by Current

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

Load Current A

Cable MaterialCopperAluminium

Ambient Temp °C

No. of Cables (Grouping)

Installation MethodIn Conduit / TrunkingClipped DirectOn Tray (Touching)On Tray (Spaced)In Free AirBuried in Ground

InsulationPVC (70°C)XLPE (90°C)

Calculation Results

Recommended Cable Size

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Calculator 02

Voltage Drop Calculator

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

Current A

Cable Length m

Cable Size mm²1.52.54610162535507095120150185240

MaterialCopperAluminium

System Voltage V

Phase3-Phase1-Phase

Calculation Results

Voltage Drop

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Drop %

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Receiving Voltage

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Calculator 03

Cable Size by Voltage Drop

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

Load Current A

Cable Length m

System Voltage V

Max Voltage Drop %

MaterialCopperAluminium

Phase3-Phase1-Phase

Calculation Results

Calc. Area

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Std. Size

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Actual Drop

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Calculator 04

Resistance & Impedance

R = ρ × L / A  |  Z = √(R² + X²)  [Ω]

Cable Size mm²

Cable Length m

Temperature °C

MaterialCopperAluminium

Reactance X mΩ/m (optional)

Calculation Results

R/m

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Total R

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Total X

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Total Z

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Calculator 05

Cable Ampacity (Current Capacity)

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

Cable Size mm²1.52.54610162535507095120150185240

MaterialCopperAluminium

Ambient Temp °C

Grouping (No. of cables)

InsulationPVC (70°C)XLPE (90°C)

InstallationIn Conduit (Ci=1.0)Clipped Direct (Ci=1.20)In Free Air (Ci=1.30)Buried Direct (Ci=0.90)

Calculation Results

Base Rating

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Temp Factor Ca

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Group Factor Cg

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Derated Rating

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Calculator 06

Short Circuit Withstand

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

Fault Current kA

Fault Duration s

MaterialCopperAluminium

InsulationPVC (70°C)XLPE (90°C)

Calculation Results

Min. Area

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Std. Cable Size

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k Factor

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Calculator 07

Power Loss in Cable

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

Current A

Cable Size mm²

Cable Length m

System Voltage V

MaterialCopperAluminium

Phase3-Phase1-Phase

Power Factor

Energy Rate ৳/kWh

Calculation Results

Power Loss

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Loss %

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Daily Cost

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Monthly Cost

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Calculator 08

Conduit Size Calculator

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

Cable Size mm²1.52.5461016253550

Number of Cables

Cable TypeSingle Core3-Core Multicore4-Core Multicore

Calculation Results

Total Cable Area

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Min. Conduit Ø

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Std. Conduit Size

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Calculator 09

Cable All-in-One Summary

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

MaterialCopperAluminium

Phase3-Phase1-Phase

Max VDrop %

Calculation Results

Load Current

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Size by Current

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Size by VDrop

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Final Recommended

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Voltage Drop

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Drop %

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Power Loss

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Conduit Size

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Calculator 10

Cable Weight & Cost Estimator

Weight = Volume × Density  |  Volume = Area × Length × Cores

Cable Size mm²

Length m

CoresSingle Core (1C)3-Core (3C)4-Core (4C)

MaterialCopper (8.96 g/cm³)Aluminium (2.70 g/cm³)

Market Price ৳/kg

Calculation Results

Total Estimated Cost

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Total Weight

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Weight per Meter

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Data Management

Saved Setups (Update / Edit)

Click "Save Setup" inside any calculator to store its values. Click "Update" below to automatically scroll to that calculator and load the values back.

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