Wiper Blade Size Guide Calculator

Wiper blades are one of the most important safety items on a vehicle, and one of the most neglected.
Worn or wrong-sized blades cause streaking, skipping and poor visibility, all of which are dangerous in rain, snow or fog.

How to Measure Your Wiper Blades

If you don’t know your wiper sizes, measure them directly:

1. Lift the wiper arm away from the windshield until it locks in the raised position
2. Measure the full length of the rubber blade (not the arm) from tip to tip
3. Note the sizes for both driver and passenger sides, they are almost always different lengths

Most cars have the driver-side wiper longer than the passenger side. Some vehicles have a rear wiper with a third, shorter blade.

Common Wiper Sizes

These are ranges, not specifications. Two sedans of the same size can differ by two inches because of windshield curvature and where the arms are pivoted. The estimate this page gives from vehicle type is a starting point for a shopping trip, not a part number.

The connection type catches more people than the size does

Blade length is easy. What sends people back to the store is the fitting. Wiper arms end in one of four common attachments, and a 24-inch blade with the wrong one simply will not go on:

• J-hook: by far the most common, a hooked end that the blade clips into
• Pinch tab: a small tab you squeeze on the side of the connector
• Bayonet: a flat blade end that slides straight into the arm
• Side pin / push button: a pin through the side, common on European cars

Most premium blades ship with two or three adapters in the box. Cheap ones often ship with the J-hook only. Look at the arm before you buy, or take a photograph of it on your phone.

Blade Types

When to Replace Wiper Blades

Replace wiper blades every 6 to 12 months, or immediately if you notice:

• Streaking, leaving bands of water
• Skipping or chattering noise
• Squealing
• Blade lifting at high speeds
• Visible cracks or tears in the rubber

Installation Tips

Always replace both wiper blades at the same time, because they wear at the same rate and a new one next to a worn one just makes the worn one obvious. Many auto parts stores will install them for free, which is worth taking them up on if the arm has a fitting you have not seen before.

Wiper Fluid

Change your wiper fluid seasonally.
In winter, use fluid rated for -20°C (-4°F) or lower.
In summer, use a formula with insect remover.

Never use plain water. It has no surfactants, it freezes, and it leaves mineral deposits baked onto the glass. A frozen reservoir also tends to split the pump, which turns a two-dollar problem into a workshop visit.