Measure overall length, maximum width, and height to the tie-down line, then add drop on both sides and both ends. A generic tarp can protect a parked car short-term, but a soft fitted cover is usually better for daily outdoor storage.
The biggest car-cover mistakes are buying by vehicle class nickname alone and leaving a loose sheet that turns into sandpaper in the wind.
Generic tarp vs fitted car cover
A rectangular tarp is a fast, cheap weather shell. A fitted car cover is shaped for mirrors, bumpers, and antennas and often has a softer lining. Use a tarp for temporary protection; consider a fitted cover if the car will live outdoors for months.
How to measure
- Measure bumper-to-bumper length.
- Measure widest point, including mirrors if they stay out.
- Measure height to the line where you want the cover to end.
- Add side and end drops so the cover can be secured under or around the body.
Starting points
| Vehicle class | Planning notes | Common tarp starting range |
|---|---|---|
| Compact / sedan | Lower height, moderate length | Often 20×20 to 25×20 ft class |
| SUV / crossover | More height and width | Often 20×30 ft class |
| Pickup | Longer outline, mirrors, bed rack options | Measure carefully; length grows fast |
Material choice
Soft, non-abrasive covers are safer for paint. Heavy industrial tarps can work in a storm emergency but may chafe more. Avoid trapping grit against the finish, and do not use a cover as a substitute for regular washing if tree sap or bird droppings are already on the paint.
Use and storage tips
- Clean loose dust before covering.
- Pad antennas, racks, and sharp trim.
- Tension the cover so it cannot flap.
- Dry both car and cover before long storage.
Frequently asked questions
Is a tarp good enough as a car cover?
For short-term outdoor protection, yes. For daily long-term outdoor storage, a softer custom-fit car cover usually reduces chafe and fits mirrors and antennas better than a stiff generic tarp.
What size tarp do I need for a sedan?
Many sedans land in the 20×20 to 25×20 ft planning range once length, width, height, and tie-under allowance are included. Measure your car; trim level and racks change the outline.
Will a tarp scratch my paint?
It can if dust is trapped underneath or the cover flaps in wind. Clean the car first, pad contact points, and keep the cover taut. A soft inner surface is safer than a rough industrial sheet.
Should I cover a car completely to the ground?
Full coverage helps weather protection, but you still need secure tie-downs and some ability for moisture to escape. A cover that balloons in wind can damage mirrors and paint.
Can I drive with a tarp on the car?
No. Tarps and casual covers are for parked storage only.
How this guide was prepared
We separate geometry and unit conversions from product claims, use exact standards where available, and flag specifications that vary by manufacturer. See our editorial policy for the review process.