Wind Energy Calculator — FarmTracker Design Group

0 kW

Turbine Size

0 kWh

Annual Output

Capacity Factor

Net Cost

— yrs

Payback

0 tons

CO₂ Offset/yr

Wind Resource & Site

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Yellow = your primary inputs Green = site/data inputs Blue = calculated results

Avg wind speed: >12 mph (Excellent) 10–12 mph (Good) <10 mph (Moderate)

☝ Click a station to auto-fill wind speed data.

Selected Location

— No location selected —

💨 Wind data applied

Auto-fills: average annual wind speed at 33 ft (10m), adjusted to hub height via wind shear formula.

Wind Speed & Site Conditions

Average Annual Wind Speed (mph) at 33 ft

Hub Height (ft)

Site Terrain

Air Density (lb/ft³, auto)

Wind Speed at Hub Height (mph)

Wind Speed at Hub (m/s)

Turbine Specifications

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Yellow = your primary inputs Green = site/data inputs Blue = calculated results

Practical turbine efficiency is 30–45% (Betz limit is ~59%). Swept area is a circle with diameter equal to rotor diameter.

Turbine Rated Power (kW)

Rotor Diameter (ft)

Cut-in Wind Speed (mph)

Cut-out Wind Speed (mph)

Turbine Efficiency (%)

Swept Area (sq ft)

Theoretical Max Power at Hub Wind (kW)

Estimated Capacity Factor (%)

Annual Energy Output

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Green = your inputs Blue = calculated results

Annual output uses a simplified Rayleigh wind distribution to estimate capacity factor. Actual output depends on site-specific wind distribution and turbine power curve.

Annual kWh Production (single turbine)

Average Daily Output (kWh/day)

Number of Turbines

Total System Output (kWh/yr)

Equivalent Homes Powered

CO₂ Offset (metric tons/yr)

System Costs

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Green = your inputs Blue = calculated results

Federal Investment Tax Credit (ITC) is 30% for wind systems through 2032. Installed cost per kW includes turbine, tower, and installation labor.

Installed Cost per kW ($/kW)

Tower & Foundation ($)

Grid Connection / Inverter ($)

Annual O&M Cost ($/yr)

Equipment Cost (turbine × kW)

Total Installed Cost (gross)

Federal ITC (30%)

Net Cost After ITC

Financial Returns

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Green = your inputs Blue = calculated results

Electricity Rate ($/kWh)

Annual Rate Escalation (%)

System Lifetime (years)

Year 1 Savings

Payback Period

Lifetime Savings

Net Profit (lifetime − net cost)

Environmental Impact

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EPA U.S. average grid emissions factor: 0.386 kg CO₂ per kWh (2023). Each tree absorbs ~21 kg CO₂/yr. Average car emits 4.6 metric tons CO₂/yr (EPA).

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Metric tons CO₂ offset / year

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Equivalent trees planted / year

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Cars removed from road

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Homes powered / year

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Gallons of gasoline offset / year

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Lifetime CO₂ offset (metric tons)