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Most adults can drink up to two 8-oz cappuccinos (≈120–160 mg caffeine) a day; keep total caffeine under 400 mg and adjust for size.

A Tim Hortons large hot coffee is about 20 fl oz (591 mL), which equals roughly 2½ US cups (8 fl oz per cup).

Start with 12 tablespoons (about 60–72 g) of medium-ground coffee for 6 cups of water; adjust a little up or down for taste.

A Starbucks Coffee Traveler holds 96 fl oz—enough for twelve 8-oz cups of brewed coffee.

Most men can enjoy 3–4 cups of brewed coffee (up to 400 mg caffeine) a day; adjust for size, caffeine sensitivity, meds, and sleep.

The safe number of decaf coffees per day depends on caffeine per cup; aim for 3–5 cups of decaf for most adults, adjusting for your caffeine sources.

For healthy adults, coffee becomes risky above about 4–5 cups (≈400 mg caffeine) per day; sensitive groups should stay below 1–2.

For most healthy adults, around 400 mg of caffeine a day—about 3–5 eight-ounce cups of brewed coffee—is generally safe, depending on strength and sensitivity.

Most healthy adults can enjoy 3–5 decaf coffees per day; keep total caffeine under ~400 mg and limit to ~200 mg if pregnant.

For teenagers, a practical cap is about 100 mg of caffeine per day—roughly one 8-oz cup of brewed coffee—and energy drinks aren’t advised.