Calculation Tools

Free Wind Energy Calculators

15 vanilla-JS calculators covering planning, permitting, and economics. All tools have transparent formulas and clearly state when they are pre-indication only — versus when an official accredited expert report is required.

Note: The tool interfaces are currently German-only — the calculation logic is universal, but text labels are in German. Use the tool descriptions below to understand the inputs; results work for any wind project but the regulatory references (BImSchG, TA Lärm, LAI) are German-specific.

Shadow Flicker Calculator

Maximum shadow length from turbine geometry and sun elevation. LAI thresholds (30 h/yr astronomical, 30 min/day, 8 h/yr real) explained.

Ice-Throw Distance

Safety distance for ice fall (1.5 × (D+H) standstill formula) + ice throw with rotation (Seifert formula).

Turbulence Indicator

Simplified Frandsen wake-turbulence calculation for park layout pre-check against IEC-61400-1 turbine classes.

Repowering Yield Calculator

Yield difference between old and new turbine configurations from rated capacity and full load hours.

Internal rate of return calculator from CAPEX, annual cash flow, term, discount rate.

LCOE Calculator

Levelized cost of energy in EUR/MWh from CAPEX, OPEX, full load hours, lifetime, WACC.

Full Load Hours Estimator

Weibull-based rough estimate from mean wind speed and turbine class.

Setback Distance Checker

Minimum distance to residential buildings per German state regulation (10H Bavaria, 1,000 m NRW/BB, TA Lärm).

Sound Pressure Calculator

Point-source approximation (L_WA → L at receiver) with comparison to TA Lärm thresholds.

BImSchG Permit Pre-Check

4-question quiz determining whether simplified (§ 19) or formal (§ 10) permit procedure applies, with EIA implications.

Permit Application Cost Estimator

Estimated total cost of full BImSchG permit application (expert reports + agency fees + project management).

CAPEX Estimator

Specific investment EUR/kW from base price, terrain difficulty, grid distance, repowering bonus.

Self-Consumption vs. Direct Sale

Compare self-consumption (on-site industrial customer) vs. EEG direct sale economics.

Bird Survey Season Planner

German bird survey methodology (Südbeck standards) — 6–10 site visits March–August, raptor nest checks.

Natura 2000 Pre-Check

FFH/Bird Protection Area pre-assessment from distance to area + species sensitivity → recommendation (pre-check vs. full assessment).

Need professional expert reports for a German wind project?

We broker to accredited German engineering offices — for the official versions of all these reports. First contact is free.