Getting a salad dressing right is mostly a numbers game. Too little oil and acid and the result is thin and disappointing. Too much and it turns heavy, salty or bitter. This free Salad Dressing Ratio Calculator removes the guesswork. You enter the dressing volume and pick the style, and the tool gives you the oil, acid, mustard, sweetener and salt, all measured and ready to mix. You get a clear answer in seconds, and you can adjust the inputs until the result fits your pan, your guests and your taste. The tool is free, needs no account, and works in your browser on a phone or a computer, so you can use it right at the stove.
The rule behind the calculator is simple and based on standard kitchen practice. A classic vinaigrette uses 3 parts oil to 1 part acid, a light one uses 2 parts oil to 1 part acid, and a sharp one uses 1.5 parts oil to 1 part acid, with about 1 teaspoon of mustard per 60 millilitres and 1 teaspoon of honey per 120 millilitres. These numbers are not guesses. They come from the ratios cooks use every day, scaled to your exact amount. That scaling is where most home cooks go wrong, because doubling a recipe by eye rarely doubles every ingredient evenly. The calculator does the maths for you, so a small batch and a large batch both come out right.
Why does the ratio matter so much? Mustard does more than add flavour: it helps the oil and acid stay mixed instead of splitting apart in the jar. Without it, a vinaigrette separates within minutes, and the salad gets oil on some leaves and pure vinegar on others. When the balance is right, flavours stay clear and nothing overpowers the rest. When it is wrong, one ingredient dominates and no amount of stirring fixes it later. That is why measuring beats tasting your way out of trouble. Taste at the end to fine-tune, but start from a ratio you can trust.
Small choices change the result more than people expect. Mix the dressing in a jar with a tight lid and shake it hard for 20 seconds. Then taste it on a single leaf, not from a spoon, because a dressing always tastes stronger alone than it does on the salad. The calculator lets you test those choices before you commit. Change one input at a time, watch the result change, and pick the version that fits your meal. This quick test saves ingredients and avoids a ruined batch, which matters most when you are cooking for guests.
The most common mistake is scaling by eye. The most common mistake is dressing the salad too early. Salted dressing wilts soft leaves within minutes, so keep the dressing apart until the moment you serve, then toss quickly and serve at once. It feels faster, but it quietly changes the balance, and the error grows with the batch size. A second mistake is using the wrong unit, for example grams where the recipe meant millilitres. The calculator keeps units clear, so check the label on your input before you trust the output.
Plan the rest of the meal around the same numbers. Make a double batch and keep the extra in a sealed jar in the fridge for up to a week. Shake well before each use, because even a mustard dressing settles overnight, and a jar of ready dressing makes weeknight salads much faster. Write the result down before you start cooking, and measure everything out first. Cooking goes much more smoothly when the ingredients are ready and the pan is hot. If you are cooking for guests, make the batch a little larger rather than a little smaller, because running out mid-meal is worse than having a small amount left over.
Leftovers and storage deserve a quick thought too. Most of these preparations keep well for a day or two in the fridge when stored in a sealed container, and many freeze well for longer. Taste leftovers before reheating, and add a splash of liquid if they have thickened in the fridge. A good batch cooked once can feed you twice, which makes the measuring effort pay off again.
Save this page for the next time you cook a salad dressing. The Salad Dressing Ratio Calculator is free, needs no sign-up, and works on any device with a browser. Enter your amounts, check the result, and cook with confidence instead of guessing. Good cooking is mostly good preparation, and a calculator that handles the numbers leaves you free to enjoy the cooking itself.
Spanish version: Calculadora de Proporción de Aliño para Ensalada – Aceite, Ácido y Mostaza