Yerba Mate Caffeine Calculator
Yerba mate is traditionally sipped from a shared gourd through a metal straw, refilled with hot water again and again over an afternoon. A 2024 lab study measured what happens to caffeine across those refills: each one pulls out roughly 20% less than the one before it. The first pour is genuinely the strongest thing in the gourd — everything after is a gradually fading tail.
How much caffeine is in yerba mate? A standard tea bag runs about 20–40 mg. A tablespoon of loose leaf steeped like tea (French press style) yields roughly 50–60 mg. A full traditional gourd session, refilled repeatedly over an extended sitting, totals around 150–200 mg. Canned yerba mate energy drinks vary widely by brand and flavor, from about 80 mg to 160 mg per can.
Every refill is weaker than the last — measured, not assumed
A 2024 study published in the journal Molecules measured caffeine across sequential mate infusions and found the second brew of the same leaves pulled about 20% less caffeine than the first. Traditional gourd culture — refilling the same leaf many times over a session — isn't just a ritual. It's also a real, measurable caffeine taper built into how the drink is meant to be consumed.
Calculate your mate
Compiled from product labels + peer-reviewed brew researchestimated caffeine — Canned energy drink, standard flavor (15.5 oz)
These are compiled estimates from product labels and published brew research, not lab measurements of any specific batch. Yerba mate's natural caffeine content varies by origin — Uruguayan-grown leaf tends to run higher, Brazilian-grown lower — so actual results will vary by brand.
The gourd, refill by refill
Modeled on a typical first-pour serving, applying the ~20% per-refill decline found in the 2024 Molecules study.
What this means if you drink mate traditionally
If you're pacing your caffeine through the day with a shared gourd, the first two or three refills carry most of the actual dose — by the fourth or fifth, you're mostly drinking flavor and ritual. This is also why "how much caffeine is in a gourd of mate" doesn't have one clean answer: it depends entirely on how many refills you're counting.
Complete yerba mate caffeine chart
Traditional preparation
| Format | Estimate |
|---|---|
| Tea bag (single serving, single brew) | 20–40 mg |
| Loose leaf, French press style (1 tbsp) | 50–60 mg |
| Traditional gourd, first pour | ~55 mg |
| Traditional gourd, full session (multiple refills) | 150–200 mg |
Scientific analysis of the raw leaf found a wide natural range, roughly 25–175 mg of caffeine per gram of dry leaf depending on origin — Uruguayan-grown mate tends toward the high end, Argentine in the middle, and Brazilian toward the low end.
Canned and bottled yerba mate
| Format | Estimate |
|---|---|
| Canned energy drink, standard flavor (15.5 oz) | 150 mg |
| Canned energy drink, lower-caffeine flavor (12 oz) | 80–120 mg |
| Bottled unsweetened mate tea (16 oz) | 140 mg |
| Higher-caffeine canned brands (e.g. Clean Cause style) | ~160 mg |
Flavor genuinely changes caffeine within the same canned lineup — some flavors are formulated as a full-strength energy drink, others as a milder fruit-forward option, even from the same brand.
What surprises people about yerba mate's caffeine
- Each gourd refill measurably loses caffeine — about 20% less with every subsequent pour, confirmed by lab testing rather than tradition alone.
- Raw leaf caffeine content varies enormously by origin — a roughly 7× range between the lowest and highest measured leaf samples in scientific analysis.
- Canned yerba mate flavors from the same brand can differ by nearly 2× in caffeine, depending on whether that flavor is formulated as a full-strength energy drink or a milder option.
- A full gourd session isn't one dose — it's several, declining ones. Treating "a gourd" as a single caffeine figure misses that most of the caffeine front-loads into the first few pours.
- Water temperature matters more than boiling harder. Research found water around 70°C (158°F) extracted slightly more caffeine than fully boiling water, consistent with how mate is traditionally served — hot, not boiling.
Yerba mate vs coffee and tea
| Drink | Caffeine |
|---|---|
| Higher-caffeine canned mate (~160 mg) | 160 mg |
| Standard canned mate energy drink, 15.5 oz | 150 mg |
| Drip coffee, 8 oz | 95 mg |
| Full gourd session (multiple refills) | 150–200 mg |
| Loose leaf, French press style | 55 mg |
| Black tea, standard cup | 40–70 mg |
| Yerba mate tea bag | 20–40 mg |
| Green tea, standard cup | 25–45 mg |
A single canned yerba mate drink is genuinely comparable to a strong cup of coffee, while a plain tea bag sits closer to standard black or green tea.
How much yerba mate a day is safe?
The U.S. Food and Drug Administration cites 400 mg a day as an amount not generally associated with negative effects in healthy adults.
| Format | Share of 400 mg guideline |
|---|---|
| Tea bag (30 mg) | 8% |
| French press / gourd first pour (55 mg) | 14% |
| Standard canned mate energy drink (150 mg) | 38% |
| Full gourd session (up to 200 mg) | 50% |
| Two standard canned mate drinks (300 mg) | 75% |
Some research has raised questions about very heavy, long-term traditional mate consumption (multiple daily sessions over years) and certain health risks, separate from caffeine itself — this is a different question from a single day's caffeine total, and worth discussing with a doctor if it applies to your habits specifically. Lower ceilings are commonly cited for some groups: around 200 mg a day in pregnancy, reachable with about one and a half standard canned drinks, and roughly 100 mg for adolescents. Sensitivity varies a great deal between individuals. Talk to a doctor or pharmacist if you're pregnant, have a heart condition or anxiety disorder, or take medication that interacts with stimulants.
Yerba mate caffeine: frequently asked questions
How much caffeine is in yerba mate?
It depends heavily on format. A tea bag runs 20–40 mg, loose leaf steeped like tea yields 50–60 mg, a full traditional gourd session totals 150–200 mg across multiple refills, and canned energy drinks range from about 80 to 160 mg per can.
Does each refill of a mate gourd have less caffeine?
Yes, measurably. A 2024 study found the second infusion of the same leaves pulled roughly 20% less caffeine than the first, with the decline continuing through subsequent refills.
How much caffeine is in Guayaki yerba mate?
Guayaki's standard 15.5 oz canned energy drink flavors run about 150 mg, while some milder fruit-forward flavors in smaller 12 oz cans run 80–120 mg. Tea bags are commonly around 40 mg, and 16 oz bottled unsweetened tea is about 140 mg.
Is yerba mate stronger than coffee?
A standard canned yerba mate drink is comparable to or slightly stronger than an 8 oz cup of drip coffee. A full traditional gourd session, counted across all its refills, can exceed a single cup of coffee, though the caffeine arrives gradually rather than all at once.
Why does caffeine content vary so much between yerba mate brands?
Raw leaf caffeine content varies enormously by growing origin, with scientific analysis finding roughly a 7-times range between the lowest and highest measured samples. Uruguayan-grown mate tends to run highest, Argentine in the middle, and Brazilian lowest.
Does brewing temperature affect yerba mate's caffeine?
Slightly. Research found water around 70°C extracted marginally more caffeine than fully boiling water — consistent with how mate is traditionally served hot rather than boiling.
How much caffeine is in a whole gourd of yerba mate?
There's no single answer, since a gourd is typically refilled many times over a session and each refill carries less caffeine than the last. A full session is commonly estimated at 150–200 mg total, but the first two or three refills carry most of that dose.
Sources and method
Tea bag, loose leaf, and canned/bottled figures are compiled from product labeling and independent testing across multiple yerba mate brands. The refill-decline model is based on a 2024 peer-reviewed study published in the journal Molecules, which measured caffeine across sequential mate infusions and found roughly a 20% decline with each subsequent brew, applied here to a representative first-pour estimate. Leaf caffeine content range and origin variation reflect published scientific analysis of dry mate leaf samples.
- Peer-reviewed study, journal Molecules, 2024 — caffeine content across sequential mate infusions and brew temperature
- Product labeling for canned, bottled, tea bag, and loose leaf yerba mate brands
- Published scientific analysis of dry mate leaf caffeine content by growing origin
- U.S. Food and Drug Administration — Spilling the Beans: How Much Caffeine Is Too Much?
- American College of Obstetricians and Gynecologists — guidance on moderate caffeine consumption in pregnancy
This page is an independent reference and is not affiliated with, endorsed by or sponsored by any yerba mate brand. Caffeine values are estimates and vary by brand, leaf origin, brewing method, and refill count. Nothing here is medical advice.