How to Sand Wooden Cutting Boards for a Safe, Smooth Finish (120–400 Grit)

Wooden cutting boards need occasional sanding to stay smooth, hygienic, and free from knife marks. Whether you’re making a new board or restoring an old one, sanding ensures a food-safe surface that’s pleasant to use and easy to clean.

Why Sand Cutting Boards?

Knife marks and moisture can raise the grain of wood, leaving the board rough and prone to bacteria buildup. Sanding smooths the surface, removes stains, and preps the board for oiling or waxing.

Tools You’ll Need

• Orbital sander or sanding block
• Vacuum or tack cloth
• Food-safe mineral oil or board wax
• Wet/dry sandpaper sheets (120–400 grit)

Recommended Grit Sequence

• 120 grit: Leveling knife marks and stains.
• 220 grit: General smoothing before oiling.
• 320–400 grit: Final finish for a silky, food-safe surface.

Step-by-Step Process

1. Clean the board. Wash and dry completely before sanding.
2. Start with 120 grit. Use 120 grit (25-pack) to remove knife marks and surface stains.
3. Refine with 220 grit. Smooth surfaces using 220 grit (50-pack) wet/dry sheets.
4. Finish with 320–400 grit. For a silky touch, sand with 400 grit (10-pack) before applying oil.
5. Clean thoroughly. Vacuum or wipe with a tack cloth to remove dust.
6. Oil the board. Apply food-safe mineral oil until fully absorbed, then buff with cloth.

Special Cases

For end-grain cutting boards, sanding may take longer—use consistent pressure and progress slowly through grits. Avoid coarse grits below 120 unless repairing deep gouges.

Pro Tips

• Sand with the grain to prevent scratches.
• Apply multiple coats of oil after sanding for maximum protection.
• Refresh boards every few months with light sanding and re-oiling.
• Avoid varnishes or finishes not rated as food-safe.

Aftercare

• Reapply mineral oil monthly or as needed.
• Hand wash only—never place wooden boards in the dishwasher.
• Store upright to allow air circulation and prevent warping.

FAQs

• Can I use coconut oil instead of mineral oil? Not recommended—cooking oils can go rancid.
• Do I need to sand every time I re-oil? Only if the board feels rough or has visible knife marks.
• What grit is best for final sanding? 320–400 grit provides a smooth yet durable finish for cutting boards.

Watch & Learn

Sanding keeps cutting boards looking great and performing safely in the kitchen. Stock up on medium sheets and fine grits to handle every stage of your cutting board restoration.