The Classic Marinade Ratio
A great marinade is not a mystery, it is a ratio. The time-tested template is 3 parts oil to 1 part acid, plus salt and aromatics. The oil carries fat-soluble flavors and helps with browning, while the acid (vinegar, citrus, wine, or yogurt) tenderizes the surface and brightens the taste. This calculator scales that template to whatever amount of meat you have, so 2 pounds of chicken thighs and 6 pounds of pork shoulder both get the correct balance.
The base volume here is about half a cup of marinade per pound of meat. That is enough to coat without drowning. Salt is calculated separately at roughly 1% of the meat weight by weight, which is the same principle as a light brine and the single biggest lever for seasoned, juicy results.
How the Math Works
Total marinade = 8 tbsp x lb x protein factor
Acid = Total / (oilRatio + 1)
Oil = Total - Acid
Salt = lb x 453.6g x 1% (approx 15g per tbsp)
Different proteins want different intensities. Delicate fish and shrimp need less acid and a shorter soak (the factor drops to 0.7), while tofu and vegetables soak up more flavor and can take a heavier hand (1.15). Beef and lamb get slightly less acid so the texture stays firm.
Why Salt Matters Most
If you remember one number, make it the salt. At 1% of weight, a 2-pound batch needs about 9 grams (a bit under 2 teaspoons of kosher salt). Salt dissolves into the muscle and helps it retain moisture during cooking, which is why a properly salted marinade beats a fancy acidic one with no salt every time.
Frequently Asked Questions
How much marinade do I need per pound of meat?
A good rule is about half a cup of marinade per pound of meat, which is enough to coat every surface without wasting ingredients. This calculator uses that baseline and adjusts up or down based on the protein you select, since vegetables and tofu absorb more while delicate fish needs less.
What is the ideal oil to acid ratio?
The classic ratio is 3 parts oil to 1 part acid, which keeps the marinade from being too harsh or sour. Punchier marinades using wine or soy sauce work better at 2 to 1, while creamy yogurt or buttermilk marinades can go to 4 to 1 because dairy acid is much gentler than vinegar or citrus.
How long should I marinate meat?
Most cuts hit their sweet spot between 2 and 12 hours, where the salt has time to penetrate and the surface tenderizes. Avoid going past 24 hours with acidic marinades, since vinegar and citrus can break the proteins down too far and leave the texture chalky or mushy.
Can I marinate fish the same way as chicken?
No, fish and shrimp need a gentler approach because their delicate proteins cook in acid the way they do in ceviche. Select the fish option to cut the acid back, and limit the soak to 15 to 30 minutes so the flesh stays firm rather than turning opaque and grainy before it ever hits heat.
Practical Guide for Marinade Ratio Calculator
Think of a marinade as three jobs in one bowl: oil for flavor delivery and browning, acid for surface tenderizing and brightness, and salt for deep seasoning and moisture retention. Aromatics like garlic, ginger, herbs, and pepper ride along on the oil. When you keep the oil-to-acid ratio steady and scale everything by weight, you get a repeatable result instead of a different outcome every time you cook.
Salt is the ingredient most home cooks underuse. At roughly 1% of the meat weight, salt acts like a quick brine, dissolving into the muscle fibers and helping them hold onto water as they cook. That is why a simply salted piece of chicken often tastes better than one drowned in a complicated acidic marinade with no salt at all. If you only measure one thing, measure the salt.
Marinate time is a curve, not a ladder. The first few hours do most of the work as salt migrates inward and the surface picks up flavor. After about 12 hours you hit diminishing returns, and past 24 hours strong acids start to denature the surface proteins so far that the meat turns mealy. Match the time to the protein: long for tough cuts and yogurt, short for fish and shrimp.
Quick Checklist
- Mix oil and acid first, then whisk in salt until it dissolves before adding meat.
- Use a zip-top bag or shallow dish so the marinade contacts every surface.
- Marinate in the refrigerator, never on the counter, to stay food-safe.
- Pat the meat dry before cooking so it sears instead of steams.