Electrical Calculation Pro is an electrical calculation application compliant with the NF C 15-100 standard, designed for electricians, engineering firms, and tradespeople in France.

Size your electrical installations in seconds. Accurate results, compliant with the NF C 15-100 standard, usable on-site or in the design office.

CABLE CROSS-SECTION CALCULATION
Find the optimal cable cross-section based on 3 criteria: permissible current (table 52H), voltage drop, and protective rating. Correction factors K1, K2, and K3 are calculated automatically. Copper and aluminum cables, single-phase and three-phase.

VOLTAGE DROP VERIFICATION
Verify voltage drop compliance with an intuitive visual gauge: 3% for lighting, 5% for other uses. Compatible with single-phase and three-phase installations, compliant with NF C 15-100.

PROTECTION CALCULATION — CIRCUIT BREAKER AND RESIDUAL CURRENT DEVICE
Determine the appropriate circuit breaker rating: check IB ≤ In ≤ Iz, curves B, C, and D. Select the 30 mA residual current device, type A or AC. Automatic selection based on circuit type (lighting, sockets, cooktops, etc.).

SHORT-CIRCUIT CALCULATION
Calculate the short-circuit current Icc at the end of the line. Verify the breaking capacity of the circuit breaker. Take upstream impedance into account.

PERMITABLE CURRENTS — TABLE 52H
Interactive Table 52H: filter by material (copper, aluminum), insulation type, and reference method. Instant results for cable sizing.

NF C 15-100 REFERENCE GUIDE
Consult the essential data of the NF C 15-100 standard: minimum number of circuits per dwelling, equipment heights, bathroom volumes, main distribution board (MDB), surge protection. Everything an electrician needs on site.

PROFESSIONAL FEATURES
- 5 complete electrical calculators
- Multi-circuit project management
- PDF export for your reports and quotes
- Works 100% offline — ideal for on-site use
- Standards updates included
- Compatible with international standards: IEC 60364, BS 7671, NEC

FREE TRIAL — NO OBLIGATION
3 free calculations per day on the Cross Section and Voltage Drop calculators. Try before you buy.

ONE PAYMENT — LIFETIME ACCESS
No monthly subscription, no ads. The most economical electrical calculation application on the market.

Electrical calculation application developed in France for electrical professionals.