/

💨 Bathroom Exhaust Fan Cost Calculator

Estimate the cost to install a bathroom exhaust fan. Choose basic, light combo, or light+heater combo based on bathroom size and duct run length.

Project Details

Bathroom Size (sq ft)

Multiply length × width; standard bathroom is 40–80 sq ft

Fan Features

Duct Run Length (ft)

Distance from fan to exterior vent cap through attic or wall

Your Estimate

—

Adjust the fields to see your estimate.

Cost Breakdown

Recommended Tools & Supplies

Cut the ceiling opening for the fan housing — score then cut cleanly

Prepare electrical connections — always turn off the breaker first

Verify power is off before touching any wiring in the junction box

Pro Tips

✓ Size the fan by CFM: multiply bathroom sq ft by 1.1 (e.g., 60 sq ft = 66 CFM minimum; round up)
✓ Vent to exterior ONLY — never into an attic. Attic moisture causes mold and structural damage
✓ Use rigid metal duct for runs over 5 ft; flexible duct traps more lint and reduces airflow
✓ A combination fan+light+heater replaces two or three fixtures — saves space and electrical runs
✓ Look for Energy Star certified fans — they're quieter and cost less to run

Prices are estimates. Links go to Amazon — we may earn a small commission at no extra cost to you.

Shop These Items on Amazon

More Bathroom & Laundry Calculators