Grated Parmesan price in Boston.

How we got these numbers

• Instacart — Aldi:Category multiplier against Walmart base, adjusted for Northeast Urban ($4.47)
• Walmart+:Regional baseline ($4.70)
• Amazon Fresh (Prime):Category multiplier against Walmart base, adjusted for Northeast Urban ($5.64)
• Instacart — Whole Foods:Category multiplier against Walmart base, adjusted for Northeast Urban ($9.88)

Live observations come from public weekly ads (Aldi, Whole Foods) and BLS Average Retail Food Prices, refreshed daily. Estimates use a per-category multiplier calibrated to NPR, Consumer Reports, and Tasting Table grocery comparison studies.

Why this category prices the way it does

Dairy is the most regionally stable category — milk and eggs track USDA market reports closely, so the price gap between services is usually under 25%.

Boston grocery context

Boston's grocery scene is shaped by the local Stop & Shop (Ahold Delhaize), Star Market (Albertsons), Market Basket (cult favorite, not on Instacart), and Roche Bros. Wegmans has multiple Boston-area stores (Newton, Burlington, Medford) with strong local following. Aldi has dense MA coverage. Whole Foods has multiple Boston and Cambridge locations. The metro's narrow streets and college-density mean delivery vehicles often double-park briefly — building access varies hugely between Back Bay brownstones and South End apartments.

Boston shoppers consistently get the best value from Instacart-Aldi for staples. Add Wegmans-via-Instacart for produce and prepared foods — the Newton and Medford stores have wide same-day windows. For Cambridge and Somerville, Trader Joe's is the cheapest premium fill-in option.

Grated Parmesan prices in other cities

• New York City, NY
• Philadelphia, PA
• Washington, DC