Ramen Broth Calculator

Tare is the concentrated seasoning base that gives each ramen style its signature flavour — soy sauce reduction for Shoyu, salt brine for Shio, fermented miso paste for Miso, and rendered pork fat seasoning for Tonkotsu. A typical ratio is 15–30 ml of tare per 300–400 ml of finished broth, and this calculator estimates the right amount based on your bowl size, servings, and broth style.

A rich Tonkotsu broth typically uses a 1:2 to 1:3 ratio of pork bones to water by weight — meaning 1 kg of bones per 2–3 litres of water. This calculator adjusts the ratio based on your chosen concentration (light, medium, or rich) to give you precise gram measurements for your batch size.

Simmer time varies greatly by style. Tonkotsu requires a rolling boil for 8–12 hours to emulsify collagen and achieve its milky texture. Shoyu and Miso broths are typically simmered 3–6 hours, while a delicate Shio broth only needs 2–4 hours. The calculator displays a recommended range based on your selected style and concentration.

Aromatic oil — called mayu in Tonkotsu ramen — is a flavoured fat drizzled on top of each bowl just before serving. Common versions include charred garlic oil, sesame oil, or lard infused with aromatics. It adds richness and fragrance. About 5–10 ml per bowl is standard, and this calculator gives you a per-bowl estimate if you choose to include it.

Yes — the servings field accepts up to 50 bowls, making it practical for catering batches. Simply enter your desired number of servings and bowl size, and all ingredient quantities will scale proportionally. For very large batches (100+ bowls), multiply the outputs by your required factor.

These are Japanese terms describing broth richness. Assari (light) broths are clear, thin, and delicate — typical of Shio or light Shoyu styles. Kotteri (rich) broths are thick, cloudy, and heavy with collagen or fat — classic Tonkotsu falls here. The concentration selector adjusts the bone-to-water ratio and simmer time accordingly.

During long simmering, significant water evaporates — a 12-hour Tonkotsu boil can lose 30–40% of the starting liquid volume. The calculator adds an evaporation buffer to your starting water so you end up with the correct volume of finished broth per serving rather than coming up short.

A plain broth base (without noodles or toppings) contains roughly 50–150 calories per 350 ml serving depending on style. Tonkotsu is the richest at 100–150 kcal per serving due to emulsified fat and collagen. Shio and Shoyu broths are lighter at 50–80 kcal. Toppings like chashu, egg, and corn add significantly more.